What is an industrial chiller?
次 Source: Shenzhen Simpson Refrigeration Technology Co., Ltd. Release time: 2019-11-16 Browse: 342 times
Industrial chiller Industrial chiller is a type of chiller, which can be divided into air-cooled chiller and water-cooled chiller. Industrial chiller is a kind of water cooling equipment, which is a cooling equipment capable of providing constant temperature, constant current and constant pressure. The principle of the chiller is to inject a certain amount of water into the internal water tank of the machine, and then cool the water through the chiller refrigeration system. Then the water pump inside the machine injects low-temperature frozen water into the equipment that needs to be cooled. The heat is taken away, and the high-temperature hot water is returned to the water tank again to reduce the temperature. In this way, the cooling is cyclically exchanged to achieve the effect of cooling the equipment.
Industrial chiller refrigeration technology Industrial chiller is typically used as a complete packaged closed-loop system, including hot and cold water units, condensers and circulating pumps, expansion valves, no-flow shutdown, internal cold water tanks, and temperature control stations. The internal tank helps maintain cold water temperature and prevents temperature spikes. Closed loop industrial chiller recirculates water-cooled equipment and instrument cleaners at constant temperature and pressure, increasing stability and repeatability with conditions addititives or clean water. Water flow is cooled to the angle of use and back of the application.
If the temperature difference between the two is high, the large external water tank will be used to store cold water. In this case, the cooling water does not come directly from the chiller application, but goes deep into the outside of the water tank as a "temperature buffer sorting behavior. The cold water tank is much larger than the internal water tank. The application of cold water from the external fuel tank And when returning hot water from the application can be traced to the external fuel tank, not to the unit.
The less common open-loop controlled industrial refrigerator is an open tank or oil pan where it continuously circulates the temperature of the liquid. The liquid comes from the tank, passes through the pump unit, and returns to the tank. An adjustable thermostatic sensory makeup liquid temperature, circulating cooler to keep the tank constant temperature.
One of the new developments in industrial chillers is the use of air cooling instead of cooling water. In this case, the condenser is not cooled with hot air refrigerant, but a cooling tower is used to cool the water. This development allows more than 15% reduction and allows for a significant reduction in energy requirements due to the small area of surface water in the cooler, condensers and fans. In addition, fans allowed a drastic reduction in noise levels.
Most industrial chillers use a cooling medium to cool them, but some simple technologies, such as air or water, include cooling coil flows that regulate temperature. Water is the most commonly used coolant in the freezing process, although cooling mixtures (mainly with coolant additives to enhance cooling water) are often used.
Composition of industrial chiller:
The operation of industrial chiller systems works through three interconnected systems: the refrigerant cycle system, the water cycle system, and the electrical control system.
The liquid refrigerant in the refrigeration cycle evaporator absorbs the heat in the water and begins to evaporate. Finally, a certain temperature difference is formed between the refrigerant and the water. The liquid refrigerant also completely evaporates to a gaseous state, and is sucked in and compressed by the compressor (pressure and As the temperature increases), the gaseous refrigerant releases heat through the condenser (air-cooled / water-cooled) and condenses into a liquid. After throttling through an expansion valve (or capillary tube), it becomes a low-temperature and low-pressure refrigerant and enters the evaporator to complete the refrigerant cycle process.
The water circulation pump is responsible for pumping water out of the water tank to the equipment that the user needs to cool. After the heat is taken away by the frozen water, the temperature rises, and then returns to the frozen water tank.
The electric appliance self-control includes power supply part and automatic control part.
The power supply part supplies power to the compressor, fan, water pump, etc. through the contactor.
The automatic control part includes the functions of temperature controller, pressure protection, time delay, relay, overload protection, etc. to achieve automatic start, stop and protection of the water temperature. Generally above 10P adopts water-cooled heat dissipation, and below 10P adopts air-cooled heat dissipation.
The air-cooled industrial chiller is generally a whole machine, and the evaporator, compressor and condenser are made together. For the air-cooled industrial chiller with slightly higher power, the heat dissipation problem of the condenser cooling fan during its operation needs to be considered. In air-conditioning plant applications, the whole machine needs to be set up with an exhaust duct to direct the heat from the cooling fan to the outside.
The air-cooled industrial chiller can also be used as a body type. The condenser is directly placed outdoors (called an outdoor unit), and the evaporator and compressor are placed indoors (called an indoor unit). However, considering the heat absorption of the refrigerant during the transfer between the condenser and the evaporator, the distance between the indoor unit and the outdoor unit should be controlled within 6 meters. In addition, the copper pipes that transport the refrigerant need to be insulated. The fan's power supply cable and control cable can be routed together with the copper pipe, so that the air conditioning plant only needs to open a hole to penetrate the pipe.
For industrial applications where small-flow and small-heat-dissipation air-cooled chiller is used, the integral type is generally used directly, and the heat dissipation problem can be ignored at this time. For air-cooled chiller with large flow and large heat dissipation, split type can be selected.
The cooling effect of the condenser of the air-cooled chiller is slightly affected by the changes in the seasonal climate of the external environment, while the water-cooled chiller uses a water tower to stabilize the heat dissipation effect. The disadvantage is that a water tower is required and the mobility is poor.