Project Overview To control air pollution in Beijing , the Beijing Institute of Geological Investigations in Canada undertake the completion of the geothermal heat pump water heating demonstration project. Winter heating a total of six office buildings and family wings, construction area of about 30,000 square meters, brick structure, originally designed for coal-fired heating boiler heating, end series on a single pipe to send the next time the system, cast iron four-poster 813-type radiator. Demonstration project for the geothermal heat source wells, water temperature 68 , water 125m3 / h, two 45m Quaternary shallow wells, water temperature 16 , the single well out of water 50m3 / h, well spacing of 100m.
The project construction period due to limitations of geothermal drilling, heating experiment in two phases. A project from December 5, 1999 to March 8, 2000 , to 16 water as heat source, using water source heat pump on the five-story office building for heating test.
Gailou construction area of 4078m2, building height 18m, March 7 walls, single glazed windows. Heating before the 14-year-old running piping for heating chemical cleaning, replacement of some of the rust damaged radiator. Heating effect for the contrast and summer cooling, in one story office building to install a fan coil. No. 1 Well from the 16 water pumped into evaporator heat pump absorbs heat well after the 2 poured back underground, to protect groundwater sources. 52 hot water heat pump output on the office building heating.
The second phase from March 8, 2000 (geothermal wells completed) to April 5, to increase water source heat pump geothermal heating run test. Geothermal well 68 in water on the 25,000 m2 building for "a" heating, in part, through the board for water temperature dropped to 13 after the discharge of water as a disposable, cold side of the side plate for circulating water through heat pump heat output after conversion 52 hot water on the building for heating.
I n summer 2000, using 1,2 pumping, irrigation wells and water source heat pump unit to the building were Refrigeration and Air Conditioning.
Main technical parameters Pump Host: GHP-type water source heat pump, a platform, on behalf of the heating capacity of 360kW, cooling capacity of 275kW, installed power of 64kW, the system thermal condition condenser out / return water temperature of 52 / 42 , cooling conditions a backwater under the evaporator temperature 7 / 12 , heating / cooling, switching from the water pipeline valve group switches to achieve. Plate heat exchanger: BR0.24 type 1 units, 12m2, 300kW ,40-13 / 10-15 , stainless steel. Cold water submersible pump: QJ50-50 / 6 type 2 units, flow 50m3 / h, Head 50m, power of 7.5kW. Southern Branch Heating circulation pump: ISG-type 80-160,3 Taiwan, traffic 50m3 / h, Head 32m, power 7.5kW. Cold water circulation pump: DFB80-32B type 2 units, flow 42m3 / h, head 24m, power of 5.5kW.
10.3 Operating Results
Winter heating, water heat pump 126 days continuous operation, stable performance for the return water temperature (52/42 ) press start and stop control, the average hourly power consumption of 40 degrees, cold well water consumption 18m3 / h, outdoor temperature is -10 , the majority of the room temperature 18 , heating the end of a small number of rooms 15-16 , installed wind disk room temperature up to 20-25 . Summer cooling, water source heat pump to run continuously for 120 days in a chilled water return water temperature (12 ) press start and stop control, outside temperature 33-40 , room temperature 22-26 .
Article Source: business.ezinemark.com
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