How Is Chiller Capacity Determined in Industrial Facilities?
- Aug 7
- 5 min read
In industrial facilities, cooling demand is often reduced to a single question: “How many kW of chiller capacity is required?” However, determining the right chiller capacity is not simply a matter of selecting equipment power.
In a production line, hotel, hospital or factory, the cooling system directly affects production continuity, equipment performance, energy consumption and operational safety. For this reason, when determining chiller capacity, not only the size of the existing area or equipment catalogues, but also the facility’s real operating conditions should be evaluated together.
At Entema Mekanik, our approach to industrial cooling systems is based on analysing the requirement not only according to today’s capacity, but also in terms of process continuity, energy efficiency, automation needs and future operating conditions..
Why should chiller capacity be determined correctly?
Chiller capacity should be determined in a way that meets the cooling load required by the system. Both insufficient capacity and excessive capacity can create operational risks.
When insufficient capacity is selected, the system may struggle to maintain the temperature range required by the process. This affects production quality, performance and operating continuity.
When excessive capacity is selected, the initial investment cost increases. In addition, the system’s operating behaviour, energy consumption and operational efficiency are negatively affected.
Therefore, the right question is not only: “How many kW of chiller capacity should we purchase?”
The real question is to understand which process conditions create the facility’s actual cooling requirement.
Which data should be evaluated when determining chiller capacity?
When determining chiller capacity in an industrial facility, many project-specific variables should be evaluated together.
The type of process to be cooled
Target inlet and outlet water temperatures
Flow rate requirement
Operating hours and shift pattern
Seasonal temperature conditions
Heat load generated by machinery and equipment
Production capacity
The facility’s existing mechanical infrastructure
Condition of pumps, piping, valves, manifolds and auxiliary equipment
Automation and control requirements
Potential future capacity increase
A capacity selection made before these data points are clarified is only an approximate equipment preference. In industrial facilities, however, the cooling system is an integral part of the process.
Process cooling and comfort cooling are not the same
In an office, residence or commercial area, an air-conditioning system mostly aims to provide human comfort. In industrial processes, however, cooling is one of the production parameters.
For example, in a plastic injection facility, the mould must be kept within a specific temperature range. Loss of control over mould temperature affects cycle time, product quality and production capacity. Similarly, keeping hydraulic oil temperature under control is important for machine performance and equipment lifetime.
For this reason, when determining chiller capacity for process cooling, not only ambient conditions but also the technical needs of the production line should be taken into account.
Why is chiller capacity critical in plastic injection facilities?
In plastic injection facilities, mould and oil cooling systems are infrastructure elements that directly affect production quality.
When the mould is not cooled sufficiently and evenly, cycle time increases. This reduces production capacity. Instability in mould temperature also creates negative results in terms of product surface quality, colour stability and process repeatability.
An increase in hydraulic oil temperature also affects machine performance. Keeping the oil within the appropriate temperature range helps reduce performance loss, wear and energy loss.
For this reason, in plastic injection applications, chiller capacity should be evaluated together with the number of moulds, machine structure, target temperature, flow rate requirement and automation setup.
System design is as important as equipment selection
In industrial cooling systems, the chiller should not be considered as an independent piece of equipment operating on its own. Auxiliary equipment, pump groups, distribution lines, valve groups, automation systems and the operating scenario should be considered as a whole. Therefore, chiller capacity should be evaluated as part of the mechanical installation design process.
A chiller selected at the correct capacity may fail to deliver the expected performance because of an incorrect piping design made beforehand or insufficient flow control.
For this reason, the following questions should be answered during system design:
Which processes will the chiller serve?
How many pieces of equipment will operate at the same time?
When does the peak load occur?
Within which tolerance range should the process temperature be maintained?
Does the existing piping and pump group meet this requirement?
Is the system suitable for future expansion?
How will monitoring and control be provided through automation?
The answers to these questions are decisive not only for determining the correct chiller capacity, but also for the long-term performance of the system.
Should the free cooling option be evaluated?
In some industrial facilities, when outdoor air conditions are suitable, free cooling solutions can contribute to energy efficiency.
Free cooling is a system approach evaluated according to the temperature range required by the process and outdoor air conditions. It may not be suitable for every facility. However, under suitable conditions, it helps reduce the operating load of the chiller system.
For this reason, when determining chiller capacity, not only the main equipment capacity but also alternative solutions such as free cooling, evaporative cooling, dry coolers or wet-dry coolers should be evaluated specifically for the project.
The most common mistakes in capacity calculations
Some of the most common mistakes when determining chiller capacity in industrial facilities are as follows:
Making a decision only according to square metres
In process cooling, area size alone is not sufficient data. Production equipment, process temperature and operating conditions should be taken into account.
Repeating the existing system as it is
Even if the old system appears to be operating, it may be inefficient. The new capacity requirement should be re-evaluated according to current production conditions.
Failing to consider future capacity increase
If the facility’s production plan is expected to grow, the system’s ability to adapt to future needs should be considered from the beginning.
Ignoring auxiliary equipment
Elements such as pump capacity, pipe diameter, valve groups, manifolds, automation and insulation affect system performance.
Evaluating energy consumption only through equipment efficiency
Energy efficiency is related not only to chiller catalogue values, but also to the operating scenario of the entire system.
How is the correct chiller capacity determined?
To select the correct capacity, the facility’s actual requirement should first be understood. In this process, needs analysis, examination of the existing system, evaluation of process conditions and engineering calculations should proceed together.
The general approach consists of the following steps:
The cooling requirement of the process is analysed.
Target temperature values and flow rate requirements are determined.
Operating hours, peak load and seasonal conditions are evaluated.
The existing mechanical infrastructure is examined.
The chiller, pump, distribution line and automation system are designed together.
Energy efficiency alternatives are evaluated.
Commissioning and operating scenarios are planned.
This approach aims not only to select the correct equipment, but also to ensure that the system operates correctly on site.
Entema Mekanik’s approach
At Entema Mekanik, we do not evaluate the requirement in industrial cooling projects only in terms of equipment capacity.
We consider the temperature conditions required by the process, the facility’s operating pattern, existing infrastructure, energy consumption and operating continuity together. We evaluate different applications such as chiller systems, free cooling solutions, dry and wet-dry cooler applications, absorption chiller systems, heat pump cycles and mould and oil cooling systems in plastic injection facilities according to the needs of each project.
Our goal is to establish reliable, efficient and sustainable cooling infrastructures that respond to the real needs of the business.
Conclusion: The answer to “How many kW of chiller capacity is required?” is project-specific
In industrial facilities, chiller capacity should not be determined according to a single catalogue value or a general calculation. Each facility has a different process structure, operating conditions, production target and existing mechanical infrastructure.
For this reason, correct capacity selection requires an engineering evaluation.
If a new chiller system will be installed in your facility, if your existing cooling infrastructure is insufficient or if your production capacity is changing, you can contact Entema Mekanik for a project-specific evaluation of your cooling requirements.
