High Temperature Water Circuit without Heater

A high temperature water circuit without a heater is an optional feature for some cooling system units, particularly relevant for systems operating at elevated temperatures. The material selection for the water circuit in a chiller system is influenced by various factors, including the temperature range, fluid type, and system pressure. When dealing with temperatures above 80°C, using plastic return lines may lead to several issues such as softening or melting, chemical degradation, leaks, and reduced lifespan. These issues arise because high temperatures can compromise the structural integrity of plastic, making them prone to deformation, brittleness, or joint failure. Therefore, it’s crucial to choose a water circuit that is specifically rated for the intended temperature range and ensure proper insulation and maintenance to minimise risks.

In scenarios where the system operates at temperatures exceeding 65°C and lacks a high-temperature water circuit, there are strategies to mitigate the impact on plastic return lines. One approach is to increase the flow rate of the chilled water to remove more heat from the process, thereby lowering the return temperature. Adjusting the temperature set point of the chilled water leaving the chiller can also help in reducing the return temperature. Another method involves incorporating a heat exchanger into the water circuit, transferring heat from the process to a secondary water loop for cooling by the chiller. If the process consistently returns high temperatures, upgrading to a chiller with a higher cooling capacity might be necessary to manage the heat effectively.

While implementing these adaptations can provide some level of protection for plastic return lines in high-temperature scenarios, they are not a substitute for a dedicated high-temperature water circuit. Each method, from increasing flow rate to adding a heat exchanger or upgrading the chiller, has its own implications for system operation and efficiency. These solutions can be effective interim measures but may not match the reliability and performance of a system specifically designed for high temperatures. When dealing with such demanding conditions, consulting with our sales team to determine the most appropriate setup for the specific requirements of the process cooling system is advisable.