DEV Community: GD kaydeli

From Equipment Procurement to Engineering Coordination How Overseas Industrial Customers Evaluate Temperature Control Solutions

GD kaydeli — Thu, 29 Oct 2026 03:16:36 +0000

As manufacturers accelerate their global expansion, procurement criteria for industrial temperature-control equipment are changing. Industry observers report that overseas customers are less likely to select equipment solely on cooling capacity, heating capacity, and price. They increasingly examine whether a temperature-control system can meet actual process requirements, operate reliably over the long term, and receive continuing support throughout delivery, installation, and maintenance.

This shift reflects rising requirements for production continuity and product consistency. In plastics processing, precision manufacturing, chemicals, new energy, food production, and other industries, temperature is not simply an environmental parameter; it is an important process variable. Even when two factories use chillers with the same specifications, their temperature ranges, control accuracy, circulating media, load variations, and operating hours may differ significantly.

Process Compatibility Comes Before Parameter Comparison

Process compatibility is usually the starting point for evaluating an overseas project. The purchaser must identify the process served by the equipment, the amount of heat that must be removed or supplied, changes in ambient temperature at the site, and whether the production line requires continuous year-round operation. In low-temperature, explosion-proof, and high-temperature heating applications, material selection, safety configuration, and control methods also form part of the assessment.

If equipment is selected solely on the basis of theoretical load while actual production cycles and peak conditions are ignored, the system may cool too slowly, temperatures may fluctuate repeatedly, or equipment may cycle frequently. These problems affect energy consumption and may also extend production cycles and increase inspection, rework, and downtime risks. A supplier's ability to understand the customer's process conditions and translate them into appropriate system parameters therefore often receives more attention than any single performance metric.

Energy Efficiency Assessment Shifts to Actual Operation

Energy efficiency is another major criterion for international customers, but the focus is shifting from rated data to actual operating performance. Industrial production loads generally vary with seasons, orders, and equipment utilization, so temperature-control systems rarely remain at full load. In addition to efficiency under rated conditions, purchasers assess part-load regulation and whether pumps, heat exchangers, and control systems can operate in a coordinated manner.

Factories that require both cooling and heating are also paying greater attention to waste heat recovery and coordinated cooling and heating. When temperature conditions and the timing of supply and demand align, heat discharged by certain production processes can be used for cleaning, preheating, or other heat-consuming operations. Whether such a solution delivers practical benefits must still be calculated using energy prices, operating hours, piping distances, and retrofit costs rather than judged solely by equipment parameters.

Reliability Shapes Long Term Cost

Industrial production has more direct reliability requirements than ordinary commercial buildings. If the temperature-control system stops, connected production equipment may be forced to reduce load or shut down. Customers therefore commonly examine core-component configurations, protection mechanisms, ease of maintenance, and spare-parts availability, while also reviewing operating experience in similar industries and climates. Serviceability and rapid fault identification also affect lifecycle cost.

Reliability assessments also consider whether the supplier provides clear maintenance intervals, a list of common spare parts, and fault-handling procedures. For overseas factories located far from the equipment's manufacturing base, transparent maintenance information and timely access to spare parts are often as important as equipment performance itself.

Cross Border Delivery Tests Coordination Capabilities

Cross-border delivery makes project management more complex. Countries and regions differ in voltage and frequency, climate, water quality, transportation constraints, and technical standards. Industrial temperature-control equipment must also interface with production lines, piping, electrical systems, and automated controls. From solution confirmation and manufacturing tests to packaging, transportation, and on-site installation, any information discrepancy can make commissioning more difficult.

This is why overseas customers increasingly include installation, commissioning, and after-sales support in pre-purchase evaluations. Beyond the equipment itself, projects often require installation-condition documentation, operator training, maintenance plans, remote diagnostics, and spare-parts support. In cross-border projects, complete technical documentation and timely communication can directly affect whether equipment enters production on schedule.

From Equipment Supply to Engineering Participation

Companies with long-standing experience in industrial temperature-control equipment R&D and manufacturing are adapting to this change in procurement logic. Through its work with overseas customers, KAYDELI Group has observed that customer questions are becoming more systematic. Discussions that once focused on cooling capacity and price now extend to process flows, operating loads, energy conditions, and subsequent maintenance.

According to information provided by the company, KAYDELI operates in industrial refrigeration, industrial heating, low-temperature refrigeration, and waste heat recovery, and its products have entered more than 50 countries and regions. Its Shenzhen branch has more than 20 years of technology R&D experience and holds 28 R&D patents. As its overseas business expands, differences in climate, energy supply, and service conditions across markets are prompting the company to participate more extensively in preliminary equipment selection and engineering coordination in addition to manufacturing.

From an industry perspective, industrial temperature-control equipment remains the hardware foundation of a project, but its practical value emerges only when it is integrated into a specific production system. International customers are assessing suppliers more comprehensively: they consider product parameters as well as process understanding, purchase cost as well as long-term energy use and downtime risk, and on-time delivery as well as continuing support after commissioning.

Competition in industrial temperature control is therefore gradually shifting from comparisons of individual units to comprehensive assessments of manufacturing, engineering, and service capabilities. For equipment companies including KAYDELI, adapting temperature-control solutions to production conditions in different countries will remain a central question as they expand in international markets.

High- and Low-Temperature Demands Coexist: How Industrial Cooling and Heating Equipment Can Adapt to Diverse Global Manufacturing Needs

GD kaydeli — Mon, 26 Oct 2026 08:10:25 +0000

As manufacturers worldwide continue to upgrade production facilities, improve energy efficiency, and diversify their supply chains, thermal management is receiving greater attention across industrial operations. From the precision temperature control required in semiconductor manufacturing and low-temperature refrigeration in chemical processing to high-temperature process heating in food production, pharmaceuticals, and materials manufacturing, temperature requirements can vary significantly from one process to another.
Determining how to configure cooling, refrigeration, temperature-control, and heating equipment according to actual process conditions is therefore becoming an increasingly important consideration for industrial companies seeking to optimize production systems and manage operating costs.
According to the International Energy Agency's (IEA) 2026 heat pump monitoring report, industrial heat pumps remain at a relatively early stage of adoption in global industrial heating applications. However, commercially available technologies already have the technical potential to meet approximately 20% of global industrial heat demand, primarily in low- and medium-temperature processes. This assessment highlights the development potential of industrial thermal-management technologies. It also suggests that equipment upgrades should not simply focus on increasing cooling or heating capacity, but should take into account process temperature requirements, available energy sources, and the feasibility of system integration.
Process Differences Are Driving Greater Specialization in Industrial Cooling and Heating Equipment
Across the global industrial landscape, temperature-control requirements vary considerably between industries.
Electronics manufacturing, precision machining, and new energy materials production typically place a strong emphasis on temperature stability. Cooling systems must not only remove process heat effectively but also minimize the impact of temperature fluctuations on product quality and process consistency. For production lines operating continuously, part-load performance, operational reliability, and long-term energy efficiency are also important considerations.
Chemical processing, pharmaceuticals, and food production often involve more complex combinations of cooling and heating requirements. Chemical reactions, for example, may require reaction heat to be removed during specific stages, while material cooling, crystallization, and certain low-temperature processes may require entirely different refrigeration temperature ranges.
Rapid cooling and low-temperature storage in food processing must likewise be designed around material characteristics, processing capacity, and hygiene requirements. At the same time, processes such as cleaning, drying, and concentration may require a stable heat supply, meaning that cooling and heating demands can exist simultaneously within the same facility.
These differences make it difficult for a single type of industrial thermal-management equipment to cover every production scenario.
Air-cooled chillers, water-cooled chillers, screw chillers, magnetic-bearing centrifugal chillers, and gas-bearing chillers each have their own appropriate operating conditions. Low-temperature refrigeration systems and industrial high-temperature heat pumps, meanwhile, are designed for more specialized refrigeration and heating applications.
Manufacturers therefore need to evaluate load variations, target temperature ranges, site conditions, and operating hours comprehensively before establishing a temperature-control system that matches actual production requirements.
Moving from Individual Equipment Selection to Comprehensive System Evaluation
In industrial projects, the selection of cooling and heating equipment is not determined solely by rated cooling or heating capacity. The actual capacity available under real operating conditions can be affected by factors including ambient temperature, cooling-water conditions, supply and return water temperatures, flow rates, and heat-exchange system configuration.
For cooling systems, engineers need to determine the actual process heat load, allowable temperature fluctuation, and variations in production cycles, and then verify equipment performance under the intended design conditions.
For low-temperature refrigeration applications, additional consideration must be given to the suitability of the secondary refrigerant or heat-transfer fluid at low temperatures, heat-transfer efficiency, and system operating safety. Selecting equipment solely on the basis of nominal specifications can result in insufficient capacity under actual operating conditions, excessive energy consumption, or frequent equipment cycling.
The evaluation of high-temperature heating systems is equally complex.
Industrial heat pumps use electrical energy to upgrade heat from a lower-temperature source to a temperature level that can be utilized by the process. Their performance is influenced by factors such as heat-source temperature, required supply temperature, and overall temperature lift.
For industrial facilities with usable waste heat, recovering heat rejected by cooling systems and redirecting it to suitable heating processes can potentially reduce demand for external energy. However, the economic viability of such a system still depends on whether cooling and heating demands are properly matched, whether their operating schedules coincide, and how local electricity prices, equipment investment, and maintenance conditions affect lifecycle economics.
As a result, industrial companies are increasingly evaluating cooling and heating systems based not only on individual equipment performance but also on overall operating performance, including annual energy consumption, adaptability to production requirements, maintenance costs, and system reliability.
A Multi-Temperature Product Portfolio for Diverse Global Requirements
As industrial applications become increasingly specialized, the ability to provide equipment covering different temperature ranges and process conditions is becoming an important capability within the industrial temperature-control sector.
KAYDELI, a manufacturer specializing in industrial heating, cooling, and temperature-control equipment, offers a portfolio that includes magnetic-bearing centrifugal chillers, gas-bearing chillers, air-cooled and water-cooled chillers, screw chillers, explosion-proof chillers, low-temperature refrigeration systems, industrial high-temperature heat pumps, and integrated engineering solutions such as waste heat recovery systems.
These technologies cover a range of applications including industrial cooling, low-temperature processing, precision temperature control, and process heating.
From an application perspective, each product category addresses different production requirements. Conventional chillers can be used for industrial equipment cooling and process-loop cooling, while low-temperature refrigeration systems serve processes requiring temperatures below conventional chilled-water ranges. Industrial high-temperature heat pumps provide another technical option for process heating where suitable heat-source conditions are available.
Under appropriate operating conditions, magnetic-bearing and gas-bearing chiller systems can use oil-free bearing and control technologies to address industrial cooling applications where energy efficiency and maintenance requirements are important considerations.
For projects involving potentially explosive atmospheres, equipment selection must comply with the applicable hazardous-area classification and relevant technical and safety standards.
According to publicly available information and information provided by the company, KAYDELI's Shenzhen operations have accumulated more than two decades of technical R&D experience and hold 28 technology R&D patents. Its products have been exported to more than 50 countries and regions, with markets covering Southeast Asia, the Middle East, Central Asia, Russia, Japan, Europe, and other regions.
This cross-regional presence also reflects a practical challenge facing industrial temperature-control equipment suppliers: climate conditions, energy prices, industrial standards, and operating practices vary considerably between markets. Equipment and system configurations therefore need to be evaluated against local conditions rather than simply replicating an existing design from another market.
Industrial Thermal Management Is Increasingly Focused on Long-Term Operating Value
As manufacturers continue to focus on production costs and energy efficiency, procurement criteria for industrial cooling and heating equipment are also evolving.
Instead of comparing equipment solely on initial purchase price, an increasing number of projects are evaluating efficiency across different load conditions, ease of maintenance, equipment service life, and the system's ability to accommodate future changes in production requirements.
This is particularly relevant for factories with simultaneous cooling and heating demands, where establishing an effective energy-utilization strategy can have a direct impact on the value of a system upgrade.
However, integrated heating and cooling and waste heat recovery are not universally applicable. Stable energy savings are more likely to be achieved when process temperatures, thermal loads, and operating schedules are sufficiently matched to support effective system integration.
From a broader industry perspective, competition in the global industrial cooling and heating equipment market is no longer defined solely by temperature range or equipment configuration. It is increasingly extending to a supplier's understanding of process requirements, ability to match technologies to actual operating conditions, and capacity to provide lifecycle services.
For industrial temperature-control equipment manufacturers such as KAYDELI, a product portfolio covering multiple temperature ranges provides a foundation for serving diverse markets and applications. Ultimately, however, comprehensive competitiveness will depend on whether each system can deliver stable and economical operation under actual process conditions while complying with applicable local technical and safety requirements.
As manufacturing methods continue to evolve, industrial thermal management is moving beyond its traditional role as an auxiliary utility and becoming an increasingly important factor in production quality, energy utilization, and operational efficiency.
Finding the right balance between diverse process temperature requirements and long-term operating costs will continue to shape the development of industrial cooling, heating, and temperature-control technologies worldwide.

Injection Molding Capacity Constrained by Cooling: How Should the Return on a Chiller System Upgrade Be Calculated?

GD kaydeli — Tue, 13 Oct 2026 06:58:03 +0000

In a modern injection molding workshop, a time breakdown of the operating cycle of a fully automated injection molding machine reveals a common industry pattern: cooling typically accounts for 50% to 80% of the total injection molding cycle time.

When orders surge and production capacity becomes constrained by the cooling stage, management and equipment engineers often face a critical decision: should the existing industrial chiller and temperature-control system be upgraded? However, many companies assess such projects by looking only at the chiller purchase cost and the change in hourly electricity expense. This often leads to the conclusion that the upgrade is expensive while its benefits are difficult to quantify.

A sound assessment of the actual return from upgrading an injection-molding chiller system cannot be limited to the apparent electricity cost. It must also quantify the additional capacity released by shorter cooling times, the reduction in scrap, and the decrease in downtime losses, while defining an appropriate measurement period and clear payback criteria.

I. Breaking Down Hidden Costs: Cooling Time, Scrap Rate, and Downtime Losses
When an injection-molding cooling system has bottlenecks, such as insufficient cooling capacity, inadequate water-flow pressure, or poor temperature-control accuracy, the resulting losses often far exceed what is immediately visible. They are mainly concentrated in three hidden cost centers:

Excess Cooling Time Creates a Capacity Drain
If poor heat-transfer efficiency forces each molding cycle to run 2 to 3 seconds longer, a precision injection molding machine operating for thousands of hours per year can lose tens of thousands of molding cycles. Because equipment depreciation and labor costs remain largely fixed, a longer cycle directly increases the fixed manufacturing cost per part.
Rising Scrap Rates: Warpage and Excessive Residual Stress
Uneven or excessively slow cooling is a major cause of warpage, shrinkage, dimensional deviation, and stress whitening in plastic parts. If local hot spots exist in the mold and the chiller cannot provide a stable, low-temperature, high-flow coolant supply, scrap and rework rates will remain high. Discarded resin, wasted electricity, and manual sorting costs then become a substantial hidden loss.
Downtime and Maintenance Losses
An aging or incorrectly sized chiller operating continuously at high load is prone to frequent alarms and protective shutdowns. An unplanned production stoppage caused by a temperature-control issue not only disrupts the production schedule but also causes abrupt mold-temperature changes and produces substantial scrap during restart.

II. Rebuilding the Cost Model: Comparing Cost per Qualified Unit Before and After the Upgrade
From financial and lean-manufacturing perspectives, the key to evaluating the return on a chiller-system upgrade is to compare the total cost per qualified unit before and after the upgrade:

Before the Upgrade: Conventional Pain Points
A low coefficient of performance (COP) combined with continuous high-load operation keeps electricity consumption high. Excess cycle time limits overall equipment effectiveness (OEE), while unstable temperature control causes material waste and scrap losses. Together, these factors keep the total manufacturing cost allocated to each qualified part at a high level.

After the Upgrade: Lean Operating Conditions
By introducing a high-efficiency temperature-control solution precisely matched to mold flow resistance and thermal load, the molding cycle can be compressed toward its physical limit. Dimensional stability improves substantially and the scrap rate approaches zero. At the same time, variable-frequency control and precise temperature regulation significantly reduce overall power consumption under partial-load conditions. Although the upgrade requires additional upfront investment, the sharp reduction in total cost per qualified unit creates greater overall profit potential for the manufacturer.

III. How Should the Measurement Period and Payback Criteria Be Defined?
To provide a clear financial basis for an injection-molding workshop upgrade, the project team should use a disciplined method to define the measurement period and the criteria for evaluating investment payback:

Define a Key Measurement Period, Such as 30 Days of Stable Production Before and after the system upgrade, track production data for at least 30 days using the same mold, the same raw-material batch, and the same process parameters. The following indicators should be collected:

Actual duration of each injection molding cycle, measured to one decimal place;

Average scrap and rework rates per shot;

Combined electricity consumption of the injection molding machine and chiller, such as energy consumption per unit output in kWh/kg;

Number and duration of unplanned shutdowns caused by temperature-control issues.

Define the Investment Payback Criteria: ROI Evaluation Quantify both the direct and indirect benefits generated by the upgrade:

Benefit A: Incremental gross profit generated by the additional capacity released through shorter cycle times;

Benefit B: Savings in raw-material and manual sorting costs resulting from a lower scrap rate;

Benefit C: Electricity-cost savings delivered by a high-efficiency, variable-frequency chiller system.
When these benefits are combined, most injection molding companies that complete a targeted temperature-control upgrade can typically recover the full upgrade cost through aggregate savings within 8 to 15 months.

IV. Industrial Temperature-Control Implementation: KAYDELI Injection-Molding Chillers and Customized Solutions
In high-load, high-throughput injection molding operations, general-purpose standard chillers often cannot fully accommodate the variable flow resistance of complex molds or the heat-rejection demands associated with high heat-flux density.

To address production-capacity constraints caused by the cooling stage, KAYDELI can provide custom mold chillers and high-accuracy, high-flow temperature-control solutions based on cavity layout, cooling-circuit pressure-drop characteristics, and the required part demolding temperature. For molds with dense, small-diameter cooling channels, the KAYDELI engineering team precisely matches high-head, high-flow variable-frequency circulation pump sets with independent multi-circuit temperature-control modules. This ensures efficient turbulent heat transfer throughout the cooling circuits and eliminates local dead zones. The solution not only overcomes the thermal boundary layer that limits mold heat dissipation, but also minimizes cooling time while maintaining dimensional accuracy and preventing warpage, helping injection molding manufacturers advance lean production with lower energy consumption and higher returns.

TOPCon Workshops Require Both Heating and Cooling: Why Conventional HVAC Designs Cannot Simply Be Replicated

GD kaydeli — Mon, 12 Oct 2026 09:50:50 +0000

In the mass production of n-type TOPCon (tunnel oxide passivated contact) solar cells, photovoltaic manufacturing has entered an era of extreme competition defined by micrometer-scale structural control and incremental conversion-efficiency gains of 0.1 percentage points. When building or expanding TOPCon workshops, many cell manufacturers habitually adopt comfort-air-conditioning or standard central-HVAC schemes used in general industrial buildings, expecting one system to handle both workshop cooling and equipment heat rejection.

In actual production, however, this approach often creates a series of engineering risks. In summer, excessive workshop humidity can degrade screen-printing pastes; temperature drift in wet-cleaning baths can cause nonuniform etching; and in winter, residual heat from high-temperature diffusion and firing areas may not be removed effectively, causing frequent chiller overload alarms.

TOPCon cell production is far more complex than simply supplying cool air in summer and warm air in winter. Stable, high-yield continuous production requires a fundamental distinction between workshop environmental loads and process-cooling demand, followed by a temperature-control architecture matched to process-section characteristics and seasonal transitions.

I. Core Decoupling: Workshop Environmental Loads (HVAC) vs. Process Cooling Demand (PCW)
The central mistake in copying a conventional air-conditioning design is attempting to use a single system to address both indoor environmental conditions and precision heat removal from high-power equipment. In a TOPCon workshop, these two load categories have fundamentally different physical characteristics and control logic.

Workshop Environmental Loads (HVAC System)
The HVAC system primarily manages airflow distribution in the cleanroom, heat released by personnel, heat transfer through the building envelope, and makeup air required after large-volume exhaust. Its core objective is to maintain workshop temperature (for example, 22°C ± 1°C), relative humidity (for example, 45% ± 5%), and cleanliness within specified ranges, thereby preventing particle deposition and condensation in the workshop.
Process Cooling Demand (PCW System)
The process cooling water system primarily serves high-temperature equipment and chemical process baths on TOPCon production lines, including tube diffusion furnaces, PECVD systems, ALD (atomic layer deposition) equipment, laser-doping systems, and wet-cleaning equipment. The substantial heat generated by this equipment is not released directly into workshop air; it must be removed through direct heat exchange in internal equipment heat exchangers using high-precision process cooling water.

If these functions are confused and workshop recirculation airflow is increased in an attempt to cool diffusion furnaces or PECVD equipment, the result is not only excessive fan energy consumption but also disruption of cleanroom positive pressure and airflow organization, creating serious quality risks and energy waste.

II. Multiple Variables: Effects of Process Sections, Temperature and Humidity, and Seasonal Change
TOPCon workshops impose demanding requirements on temperature-control systems because they integrate complex chemical, thermal, and optical processes and are strongly affected by outdoor conditions and exhaust-air volumes.

Differentiated Temperature-Control Requirements Across Process Sections

Wet texturing and cleaning: These sections require temperature control of large volumes of acid and alkaline process solutions. Even a small bath-temperature fluctuation of 0.5°C can directly alter chemical reaction rates and produce nonuniform pyramid-texture morphology on silicon wafers. The section therefore requires rapid thermal response while also accommodating the substantial sensible and latent loads removed by corrosive exhaust systems.

High-temperature diffusion and PECVD/ALD: These are typical high-heat-load, continuous-operation applications. Furnace bodies and high-frequency power supplies generate sustained, substantial heat, requiring the process chilled-water system to maintain very high stability during 24-hour continuous operation, without cooling-water temperature drift or interruption.

Screen printing: This process is highly sensitive to ambient relative humidity (RH). The viscosity of electrode materials such as silver paste can vary significantly with humidity. If workshop humidity is too high, the paste may absorb moisture, leading to screen-mesh blockage or line-width deviation and directly reducing cell conversion efficiency.

Seasonal Conflict Between High Exhaust Rates and Makeup-Air Heat and Moisture Treatment Because wet-process and chemical-use areas in TOPCon workshops require extensive corrosive exhaust, large volumes of outdoor makeup air must be introduced through makeup air units (MAUs). This creates pronounced seasonal load variations:

Hot and humid summer conditions: Outdoor makeup air has a high moisture content, so MAUs require substantial cooling capacity for deep dehumidification and cooling. The cooling-source system must therefore handle simultaneous peaks in sensible and latent loads.

Cold and dry winter conditions: Although outdoor air is cold, high-temperature process equipment inside the workshop continues to release large quantities of heat. Outdoor makeup air must be heated and humidified, while the process cooling water system (PCW) still operates at full cooling duty. The facility therefore experiences the complex condition of a cold exterior, a hot interior, and simultaneous heating and cooling demand.

III. A Practical Path Forward: Cascaded Cooling and Free Cooling
To address the complex requirements of TOPCon workshops, modern photovoltaic temperature-control architectures are evolving toward staged supply, precise temperature control, and dynamic energy optimization:

Cascaded water supply and temperature-zone separation: PCW supply-temperature requirements vary by equipment. Laser equipment and high-precision sensors, for example, may require high-accuracy chilled water at 18°C to 20°C, whereas PECVD equipment and the external surfaces of diffusion furnaces can use medium-temperature water at 22°C to 25°C. Cascaded cooling with separate temperature zones avoids wasting high-grade cooling capacity by supplying unnecessarily cold water to medium-temperature equipment.

Reducing energy consumption through free cooling: Because TOPCon workshops require process cooling throughout the year, lower outdoor temperatures during transitional seasons and winter can be used to produce process water through plate heat exchangers in free-cooling mode. This allows chiller compressors to shut down partially or completely and can significantly reduce manufacturing cost per watt of cell output.

IV. Industrial Temperature-Control Implementation: KAYDELI Photovoltaic-Specific Equipment and Customized PCW Solutions
In the construction and retrofit of temperature-control systems for TOPCon cell workshops, standard general-purpose chillers often cannot accommodate the combined requirements of wet-process bath temperature control, high-load PECVD heat rejection, and high-precision cooling water for laser equipment. To address these industry challenges, KAYDELI provides customized cascaded PCW supply and multi-loop constant-temperature solutions designed around TOPCon processes.

For project implementation, KAYDELI develops application-specific models based on the actual heat-load characteristics and piping-network topology of each TOPCon process section. Separate water distribution is configured for the different heat-rejection requirements of PECVD equipment, diffusion furnaces, wet-cleaning baths, and other systems, with high-head variable-frequency pump sets and high-accuracy temperature-control modules matched accordingly. This approach helps prevent localized overheating caused by hydraulic imbalance and enables flexible switching to free-cooling mode during seasonal transitions, supporting low-energy operation while maintaining high cell yield.

Heating, cooling, temperature, and humidity control in a TOPCon workshop cannot be solved by simply adding conventional comfort-air-conditioning systems. Only by fully decoupling workshop HVAC from process-equipment PCW, and by applying cascaded cooling and precise temperature control according to the physical characteristics of wet processing, diffusion, screen printing, and other sections, can stable mass production of high-efficiency cells be supported.

TOPCon Workshops Require Both Heating and Cooling: Why Conventional HVAC Designs Cannot Simply Be Replicated

GD kaydeli — Mon, 12 Oct 2026 07:37:18 +0000

I. Core Decoupling: Workshop Environmental Loads (HVAC) vs. Process Cooling Demand (PCW)

The central mistake in copying a conventional air-conditioning design is attempting to use a single system to address both indoor environmental conditions and precision heat removal from high-power equipment. In a TOPCon workshop, these two load categories have fundamentally different physical characteristics and control logic.

1. Workshop Environmental Loads (HVAC System)

The HVAC system primarily manages airflow distribution in the cleanroom, heat released by personnel, heat transfer through the building envelope, and makeup air required after large-volume exhaust. Its core objective is to maintain workshop temperature (for example, 22°C ± 1°C), relative humidity (for example, 45% ± 5%), and cleanliness within specified ranges, thereby preventing particle deposition and condensation in the workshop.

2. Process Cooling Demand (PCW System)

The process cooling water system primarily serves high-temperature equipment and chemical process baths on TOPCon production lines, including tube diffusion furnaces, PECVD systems, ALD (atomic layer deposition) equipment, laser-doping systems, and wet-cleaning equipment. The substantial heat generated by this equipment is not released directly into workshop air; it must be removed through direct heat exchange in internal equipment heat exchangers using high-precision process cooling water.

II. Multiple Variables: Effects of Process Sections, Temperature and Humidity, and Seasonal Change

TOPCon workshops impose demanding requirements on temperature-control systems because they integrate complex chemical, thermal, and optical processes and are strongly affected by outdoor conditions and exhaust-air volumes.

1. Differentiated Temperature-Control Requirements Across Process Sections

2. Seasonal Conflict Between High Exhaust Rates and Makeup-Air Heat and Moisture Treatment

Because wet-process and chemical-use areas in TOPCon workshops require extensive corrosive exhaust, large volumes of outdoor makeup air must be introduced through makeup air units (MAUs). This creates pronounced seasonal load variations:

III. A Practical Path Forward: Cascaded Cooling and Free Cooling

To address the complex requirements of TOPCon workshops, modern photovoltaic temperature-control architectures are evolving toward staged supply, precise temperature control, and dynamic energy optimization:

IV. Industrial Temperature-Control Implementation: KAYDELI Photovoltaic-Specific Equipment and Customized PCW Solutions

In the construction and retrofit of temperature-control systems for TOPCon cell workshops, standard general-purpose chillers often cannot accommodate the combined requirements of wet-process bath temperature control, high-load PECVD heat rejection, and high-precision cooling water for laser equipment. To address these industry challenges, KAYDELI provides customized cascaded PCW supply and multi-loop constant-temperature solutions designed around TOPCon processes.