GRAD geothermal heat and cooling unit
Ground source heat pump unit is a kind of new type energy utilization technology which uses shallow ground energy to make heating or cooling and it is one of heat pumps.
Heat pump unit generally means to transfer the heating or cooling from underground to the required places. Generally, heat pumps are used for refrigeration and heating. Ground source heat pump has also utilized the strong heat and coldness storing capacity of the underground soil, to transfer the heat in underground soil to the inner buildings and to transfer the heat in the buildings to underground. One circle, one year.
The ground source heat pump unit applies the underground soil as the heat or cooling source, so it has the following advantages:
1. Renewable technology:the shallow surface is a large solar energy collector gathering 47% of solar energy from the sun sending out to the earth. Besides,as a energy storing system, ground source heat pump saves energy in winter and utilizes in summer. Therefore, this system is a new renewable technology.
2. Economical efficient energy saving technology: the temperature of ground energy is relative stable which makes running efficiency of the ground source heat pump unit 40% high than traditional one and saves about 30%-40% running cost. It needs no cooling tower and wastes no water resource.
3. Remarkable environmental benefits: compared with the air source heat pump unit, this unit exhausts pollution 70% less.
4. Multiple functions: one heat pump unit can offer domestic hot water as well as cooling and heat.
5. It takes up no ground area: the heat exchanger will be buried underground and can be set around the buildings. It covers no ground area and needs no boiler plant also.
Components
1. Semi-hermetic screw refrigeration compressor, with simpler structure, even and continuous inlet and exhaust air, small running shock, high stability and long life span.
2. Shell & tube evaporator and condenser
3. Expansion valve: electronic expansion valve control system can meet as much as 2600 steps control precision, which can make the unit keep optimal condition.
4. All the assembly work will be finished in the factory and the unit can be delivered after qualified operation and trial test.
5. Microcomputer control system.
The standard operation conditions:
Cooling conditions:the underground water inlet temperature: 25°C, outlet temperature:30°C; cold water inlet temperature 12°C, outlet temperature 7°C.
Heating conditions: the underground water inlet temperature: 0°C, outlet temperature:__°C; hot water inlet temperature 40°C, outlet temperature __°C.
The outlet temperature under heating conditions depends on the water flow under cooling conditions.
Usually we use plywood package or naked package. Some of the products like fan coil unit or table tennis board have standard carton package. The shipping terms are LCL, 20’ container, 40’ container
Shandong GRAD Group Co., Ltd. is located in Dezhou city, Shandong Province,covering an area of 450,00 square meters. It is a large modern enterprise group with central air-conditioning, ventilation, FRP products research development, design, production, sales, installation and maintenance.It is the backbone enterprise of "Dezhou • Central air-conditioned city" named by China Refrigeration and Air Conditioning Industry Association(CRAA).
GRAD Group products include: central air conditioning series products(chillers, air conditioners, fan coils, cooling towers, ventilators and accessory products), FRP series products (FRP winding pipes and storage tanks), SMC moulding products (water tanks, table tennis boards, basketball boards, manhole covers, etc) . All products have been inspected by the national quality inspection department.
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