Extra Close Control

Applied Thermal Control offers an optional Extra Close Control feature for its units, incorporating a stepper-motor controlled hot gas bypass valve. This advanced mechanism achieves a remarkable temperature stability of +/-0.02°C, providing finer control over the temperature by balancing a mix of hot and cold refrigerant. This system is particularly effective in scenarios where cooling load varies or when the system operates at low loads, preventing the evaporator from becoming too cold and potentially freezing. The electronically controlled hot gas bypass valve is crucial in maintaining stable temperatures, automatically adjusting the amount of hot refrigerant gas to ensure optimal efficiency.

The valve operates by continuously monitoring the temperature and pressure of the refrigerant. If the temperature falls below a certain threshold, the valve opens to allow hot gas to bypass the evaporator and blend with the colder, low-pressure refrigerant. This process ensures a more stable control of the temperature, making it particularly useful in variable load conditions, low-load operations, and temperature-sensitive applications like pharmaceutical processing or food production, where precise temperature control is essential.

While the Extra Close Control feature offers significant advantages, such as improved temperature precision and system efficiency, its primary considerations include an increased cost and lead time. These factors are important when evaluating the system’s overall value and suitability for specific applications.