Introduction to the working principle of ground source heat pump

In nature, water always flows from high to low, and heat always passes from high to low. People can use water pumps to pump water from a low point to a high place, so that water can flow from low to high, and the heat pump can also transfer heat from low temperature to high temperature.

Therefore, the heat pump is essentially a heat-lifting device, which consumes a small amount of electric energy during operation, but can extract 4-7 times of electric energy from the environmental medium (water, air, soil, etc.), and raises the temperature for utilization. This is also the reason for the heat pump energy saving.

Ground-source heat pump is a kind of heat pump. It is an air-conditioning technology that uses buildings or water as a source of cold and heat to cool the building in winter and cool in summer. The ground source heat pump only “transfers” energy between the earth and the room. Minimize power to maintain the temperature required in the room.

In the winter, 1 kilowatt of electricity, 4-5 kilowatts of heat from the soil or water source is sent indoors. In the summer, the process is reversed, the heat in the room is transferred to the soil or water by the heat pump, so that the room gets cool air. The energy obtained underground will be used in the winter. This week, the building space and nature are united. Get the most comfortable living environment at the lowest price.

Heat pump principle

The heat pump unit consists of four parts: a compressor, a condenser, an evaporator and an expansion valve. The liquid working medium (refrigerant or refrigerant) is continuously completed: evaporation (absorption of heat in the environment) → compression → condensation (heat release) ) → throttling → re-evaporation of the thermal cycle process, thereby transferring heat from the environment to the water. Compressor: It plays the role of compression and conveying circulating fluid from low temperature and low pressure to high temperature and high pressure. It is the heart of heat pump (refrigeration) system. Evaporator: It is the device that outputs cooling capacity. Its function It is to evaporate the refrigerant liquid flowing in through the throttle valve to absorb the heat of the object to be cooled, and to achieve the purpose of cooling; Condenser: is a device for outputting heat, and the heat absorbed from the evaporator together with the work of the compressor The converted heat is carried away by the cooling medium in the condenser to achieve the purpose of heating; Expansion valve or Throttle: throttling and depressurizing the circulating working medium, and regulating the evaporation into the evaporation The circulating fluid flow of the device. According to the second law of thermodynamics, the work (electric energy) consumed by the compressor plays a compensating role, so that the circulating working fluid continuously absorbs heat from the low temperature environment, radiates heat to the high temperature environment, and circulates reciprocally.

Heat pump classification

The heat pump is the heat that needs the condenser, and the evaporator absorbs heat from the environment. At this time, the object that takes heat from the environment is called the heat source; on the contrary, the cooling requires the cooling capacity of the evaporator, and the condenser discharges heat to the environment. The object of environmental heat removal is called a cold source.

The evaporator condenser is mainly divided into two types: air heat exchange and water heat transfer according to the difference between the circulating working medium and the environmental heat exchange medium. The heat pump can be divided into four types according to the different heat exchange mediums: water-water type, water-air type, air-water type, and air-air type. A heat pump that uses air as a source of cold heat is called an air source heat pump. Air source heat pumps have a long history and are easy to install and use, and are widely used. However, due to the difference in regional air temperature, the typical application range in China is the area south of the Yangtze River. In North China, the average temperature in winter is below zero degrees Celsius. The ordinary air source heat pump not only has poor operating conditions, but also has poor stability. Because of the frosting problem, the efficiency is low. Now, a new ultra-low temperature air source heat pump is specially designed for North China. The ultra-low temperature air source heat pump has good stability, high efficiency and high efficiency defrosting function. A heat pump that uses water or geothermal heat as a source of heat is called a ground source heat pump. Water and geothermal heat are an excellent heat source. They have large heat capacity and good heat transfer performance. Generally, the heat supply efficiency or capacity of the source heat pump is higher than that of the air source heat pump, but the application of the ground source heat pump is often limited by water source or geothermal heat.

The ground source heat pump system can be divided into closed cycle system, open cycle system and mixed cycle system according to its cycle form. For closed loop systems, most of the underground heat exchangers are closed loops, and the pipes used are high density polyethylene pipes. Pipes can be buried 150-200 feet deep through vertical wells, or buried 4-6 feet underground, or at the bottom of the pond. In the winter, the fluid in the pipe draws heat from the ground and brings it into the building. In the summer, the heat in the building is sent to the underground for storage. ̈For the open circulation system, the water in the pipe comes from the lake. The water source in a river or shaft, after exchanging heat with the building in the same way as a closed loop, the water flows back to its original location or to other suitable locations; for a hybrid circulation system, the underground heat exchanger is generally pressed The heat load is used to calculate that the additional cooling load required for summer is provided by a conventional cooling tower.

Ground source heat pump principle

The ground source heat pump uses the cold and heat exchange between water and ground energy (groundwater, soil or surface water) as the source of heat source for the ground source heat pump. In winter, the heat in the ground energy is “taken out” to supply indoor heating. The ground energy can be “heat source”; in summer, the indoor heat is taken out and released into ground water, soil or surface water, and the ground can be “cold source”.

Non-Metallic Ground Hardener
Scope of application:
Non-metallic Ground Hardener
For wear-resistant impact and reduce the dust on the ground, such as: warehouses, docks, factories, parking lots, maintenance workshops, garages, warehouse-style shopping malls until the ground.
Performance characteristics:
1, with a high degree of wear resistance;
2, reduce dust;
3, impact resistance
4, construction is convenient, easy to maintain;
5, rich colors (cement color, green, red, gray, blue, etc.)

Construction Technology:
1, leveling the horizon leveling, the aggregate evenly spread on the leveling layer;
2, two evenly spread wear-resistant aggregate. Mention pulp and trowel
3, saw the concrete in the appropriate position, make expansion joints, and caulk;
4, curing curing the ground.

Technical index:

Non-metallic Ground Hardener

Non-Metallic Ground Hardener,Red Non-Metallic Floor Hardener,Primary Non-Metallic Surface Hardener,Iron Green Non-Metallic Floor Hardener

Jiangmen Kasole Building Materials Co., LTD. , http://www.kasole-paint.com