Week 8 Water-source heat pump

Shallow water (groundwater, rivers, lakes, oceans, etc.) in the earth's surface absorbs the sun's radiation energy into the earth, and the temperature of the water is generally very stable. Water source heat pump system extracts heat from the water to the building to meet the needs of users of heating and cooling. Water source heat pump is a kind of clean renewable energy technology.

1.     High efficiency and energy saving 

Water source heat pump units use the water temperature of 12-22 degrees Celsius in winter, the water temperature is high than the ambient air temperature, so the heat pump cycle of the evaporation temperature is increased and the energy efficiency ratio is also increased. In summer, the water temperature is lower than the ambient air temperature and the efficiency of the unit is improved.

2.     Environmental benefits 

Water source heat pump use electric energy. Electric energy is a kind of clean energy, but in power generation process it consumes primary energy and lead to pollutants and carbon dioxide greenhouse gas emissions. Electricity consumption of water source heat pump units, compared with the air source heat pump, equivalent to more than 30% reduction, compared with electric heating, equivalent to less than 70%. Water source heat pump unit run without any pollution and can be built in a residential area. The system has no burning, no smoke, no need for stacking fuel waste sites and no long-range transport of heat. The transportation and storage cost of fossil fuel is saved, and the air pollution caused by the pollutant emission of the coal burning boiler is solved.

Reference List:

Wenku.baidu.com. (2011). Working principle of water source heat pump. [online] Available at: http://wenku.baidu.com/view/94b58d0202020740be1e9b9e.html?from=search [Accessed 30 Apr. 2016].