Air conditioning system The energy efficiency ratio of air direct expansion to chiller is 50

Hello, direct expansion air conditioning units include various forms of air conditioning products, such as unit air conditioners, ceiling air conditioners, ceiling air duct machines, multi-online (also known as "one-to-many" units, inverter multi-online, etc.), rooftop air conditioners, and also include: dehumidifiers, precision air conditioners, etc.

Refrigerant machine vs water machine, the difference is a bit big:

1。Principle structure.

Generally, the refrigerant unit has only one circulation system. It is the freon refrigeration cycle.

The chiller has three cycles, Freon Cycle, Cooling Water Cycle, and Chilled Water Cycle.

2。Scope of use.

Refrigerant unit: The applicable construction area is relatively narrow and the refrigeration capacity is limited. However, this is suitable for general household ** air conditioners.

Because refrigerants and copper pipes are expensive. In the event of a leak, there is a risk of leakage. Representative system:

It's a home air conditioner, a VRV air conditioner.

Chiller: Due to the use of water-borne cooling, the use of a large construction area, which can be a building or several buildings. It can be operated in parallel with multiple machines, and the temperature change is stable, and the comfort is generally maintained. The average 5-star hotel will definitely choose a good water machine with high energy efficiency.

3。Cost. Refrigerant units are cheap to build due to their characteristics. But it doesn't save energy.

Chillers are highly fake, but energy-saving. The COP of the centrifuge can reach 5 or even 7 or more. Of course, there are also screw units with less counterfeiting.

Personally, I usually look at the basic knowledge and comparison of air conditioning in the industry ** and forums, and I hope it can help you.

This depends on the performance of the compressor and the set temperature of refrigeration, the higher the set temperature of refrigeration. the higher the energy efficiency ratio.

The energy efficiency ratio of household air conditioners is around.

Large air-conditioning chillers are about 3 4.

The freezer depends on the refrigeration temperature of about 2 to 3, or even lower.

A chiller refers to a hot and cold source device.

Direct expansion air-conditioning unit - the literal understanding should refer to the kind of air handling equipment that uses refrigerant directly into the combined air-conditioning unit, which belongs to the end product of refrigeration.

Conventional chillers are divided into vapor compression type (vortex, screw, centrifugation) and absorption type (lithium bromide), etc., which belong to the equipment that does not provide cold and heat sources at the end.

Air conditioning units, fan coil units, capillary air conditioners, etc. belong to terminal equipment.

The direct expansion air-conditioning unit should be composed of a cold and heat source unit + a combined air-conditioning unit, because there is no water pump, the refrigerant enters the combined air-conditioning unit through the pressure provided by the compressor, so the distance between the refrigeration unit and the end group can not be too far, otherwise it will attenuate greatly.

Chillers, on the other hand, generally deliver chilled water through a water pump, which can be larger in terms of functional range.

Generally speaking, the chiller has a better cooling effect, lower energy consumption and a wider range of applications.

Hello, I'm Matson Refrigeration Hole. Direct evaporation has a higher energy efficiency ratio. However, the stability of the system is not as good as the fan number. Generally, direct evaporation is used in low temperature environments, and direct evaporation is generally considered around -10. If you want to read the book, you can directly find the principle of refrigeration, and the textbook has it.

There are many types of chillers! It is also a device that provides a source of cold and heat at the end.

The combination of water-cooled chiller + air conditioning box has a higher overall energy efficiency ratio.

Of course, this premise is that the heat exchange capacity of the air conditioning box is appropriate, that is, it matches the output capacity of the water-cooled host.

The energy efficiency ratio of the water-cooled chiller itself is much higher than that of the direct expansion unit, and the overall energy efficiency ratio is still high after increasing the motor power of the cooling water pump, cooling tower, chilled water pump and air conditioning box after supporting use.

And the direct expansion air conditioning box is generally not large.