water source heat pump system application and case study
Heat pump systems are applied mostly in hot water supply,heating in HVAC and swimming pool temperature maintaining.Heat pump can replace oil-fired or gas-fired boilers in hotel,hospital,dormitory and gymnasium to reduce running cost.According to the application condition in buildings,heat pump systems can be classified into two typical categories which as air source and water source.Air source heat pump is easier to install and to use.But the problem is how to keep it operating at higher efficiency.On the otherhand,water source heat pump system is from time to time combined with HVAC system in building.It is more efficient than air source heat pump,even though there are more considerations need to consider in planning.
Heat pump business applications for almost 20 years of history, the
United States to 1985 there were 14,000 units heat pumps, to 1997 on the
installation of 45,000 units, up to now has been installed more than 400,000
units, and the rate of 10% per annum has increased steadily. In 1998 the U.S.
commercial buildings (International hotels, large hospitals), the heat pump
system, air conditioning accounts for 19% of the total capacity, which accounted
for 30% of new construction .
U.S. pump industry has been established by the
U.S. Department of Energy, EPA and many heat pumps manufacturers heat pump
composed of the United States Association, the Association will invest 100
million U.S. dollars in recent years engaged in the development, research and
extension work in 2001 to reach 400,000 units per year to install heat pumps
goal to reduce greenhouse gas emissions by 1 million tons, equivalent to a
reduction of 50 million cars or planting a tree discharge of pollutants a
million acres, the annual energy cost saving of 4.2 billion U.S. dollars, Since
then, the annual savings of energy costs an additional 170 million U.S. dollars .
And the United States the development of different heat pump, central and
northern Europe such as Sweden, Switzerland, Austria, Germany and other
countries are mainly the use of shallow geothermal resources, underground soil
buried coil (the depth of "400 m) and heat pumps, radiant floor fan coil for the
indoor and the provision of hot water. According to 1999 statistics, the
civilian heating devices, heat pumps proportion of 96% in Switzerland, Austria,
38%, Denmark 27% .
The global application of heat pump case since 1995,
produces around 59% of the growth rate of 9.7% annually in order to grow, most
concentrated in the United States and Europe, others such as Japan and Turkey,
heat pump unit installed capacity of about 6,875 MW, 2000 Nian Chu annual
consumption of 23,287 TJ / year (6,453 GWh / year), the number of actual
installation of about 500,000 units with a total capacity of about 12kW of heat
pump machine is equivalent to 570,000 units, 12kW for the United States and some
European countries the use of civilian-type heat pump specifications .
China
is a continental climate, four distinct seasons, the winter cold period of the
current value of the highly developed industrial and commercial, commercial
office buildings and homes have been concentrated in the local building codes
set out the need for air-conditioning heating, in which every winter under the
terms must have a considerable energy consumption, the increasing shortage of
crude oil and other energy sources today, heat pump heating is already
mainstream technology.
From: baidu.news
