Auxiliary Accessory and Cooling Methods of industrial chiller

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This article will introduce the common auxiliary accessory of chiller, including water flow switch, pressure controller, differential pressure controller, temperature controller and solenoid valve, as well as brief introduction of three refrigeration modes, compression-type refrigeration cycle, gas expansion refrigeration and thermoelectric refrigeration.

common auxiliary parts of chiller
1. Water flow switch
The water flow switch is used as the control or cut-off protection of the fluid flow in the pipeline. When the fluid flow reaches the set value, the switch automatically cuts off (or turns on) the electricity circuit.

GE-315 Adjustable Paddle Flow Switches

The GE-315 Series Paddle Water Flow Switch is a new design, adopt mic...

2. Pressure controller
The pressure controller is used for pressure control and pressure protection. The unit has low-pressure and high-pressure controllers to control the working range of the system pressure. When the system pressure reaches the set value, the switch automatically cuts off (or turns on) the circuit.

3. Differential pressure switches controller
The differential pressure  switches controller is used to control the differential pressure. When the differential pressure reaches the set value, the switch automatically cuts off (or turns on) the circuit.

GE-511C Differential Pressure Switches

GE-511C differential pressure switches adopt stainless steel material,...

4. Temperature switches controller
The temperature controller is used as the control or protection of the unit. When the temperature reaches the set value, the switch automatically cuts off (or turns on) the circuit. In our products, the temperature control is often used to control the start-up and shutdown of the machine with the water tank temperature. Some, like antifreeze, require a temperature controller.

Dual Metal Temperature Switches

This compact bimetallic temperature switch will could work with most i...

5. Solenoid valve
Cut off the water system circuit when the compressor is shut down to avoid liquid hammer when the compressor is next started. Generally used in larger refrigeration system.

Solenoid Valve with Welding Connection

Solenoid Valve with Welding Connection for Refrigerating Chiller, CAST...

Three refrigeration modes
1. Compression-type refrigeration cycle :
1) compression: the normal temperature gas state changes to the high pressure and high temperature gas state.
2) condensation: high pressure and high temperature gas state changes into high pressure liquid state.
3) evaporation: the high-pressure liquid state changes into the low-pressure gas state to absorb heat and realize refrigeration.

2. Gas expansion refrigeration:
Gas expansion refrigeration uses the adiabatic expansion of high-pressure gas to achieve low temperature, and uses the heat recovery process of the expanded gas under low pressure to refrigeration. Due to the different equipment of gas adiabatic expansion, there are generally two ways: one is to expand the high-pressure gas through the expander, with external power output, so the temperature drop of the gas is large, and the refrigeration capacity is also large during the heat recovery, but the expander structure is complex The other way is to expand the gas through the throttle valve, output reactive power, reduce the temperature drop of the gas, and reduce the cooling capacity. However, the throttle valve is simple in structure and easy to adjust the gas flow.

3.Thermoelectric cooling uses the Peltier effect to create a heat flux at the junction of two different types of materials. A Peltier cooler, heater, or thermoelectric heat pump is a solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current. Such an instrument is also called a Peltier device, Peltier heat pump, solid state refrigerator, or thermoelectric cooler. It can be used either for heating or for cooling, although in practice the main application is cooling. It can also be used as a temperature controller that either heats or cools.