Air Source Heat Pump (ASHP)


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Description There are three main types of heat pumps, vapour compression, adsorption and absorption heat pumps.

In the majority of cases compression heat pumps are used. For operation they need mechanical energy. Heat pumps reverse the natural heat flow from a higher to a lower temperature. In heating mode heat pumps transfer heat from the surroundings into buildings. In cooling mode they transfer heat in the opposite direction.
The most frequently used sources of energy for heat pumps are air (Air Source Heat Pump, ASHP) and water (Water Source Heat Pump, WSHP), but also soil and waste can be used. Centralized and decentralized heat pumps are available, whereby the latter are used to heat or cool one room or part of the building only.

Advantages
  • Low CO2-emissions
  • Allows for heating and for cooling
  • Lower operating costs compared to conventional gas condensing boilers
  • Subsidies
Disadvantages
  • High investment cost (technology is still very expensive)
  • Limited application of ground water heat pumps
  • Restrictions regarding the use of soil water pumps
  • Decentralized heat pumps: acoustic emission
Characteristic features

Interior space heating and cooling is provided by air source heat pumps

Application barriers
  • High investment cost (Costs range from 200 – 500 €/kWth for ambient air as energy source to 1000 – 1500 €/kWth for ground systems)
  • Limited usability
Information sources http://heatpumpcentre.org
http://waermepumpe.de
http://colt-info.de (decentralized heat pumps)
Image 200px-Heatpump.svg.png
Trade: Building services
Parameter Minimal Value Maximal Value Unit
Dimensions

871/300/630

1680/1000/1710

W/D/H in mm

Weight

57

148

kg

COP

1.98

5.0

COP Annual Degradation Rate

%

Permitted Operating Temperature

-25

58

°C

Heating Capacity

2.97

20.20

kW

EER

2.2

2.5

Cooling capacity

4.2

13.1

kW

Heat Transfer Nominal Flow

0.18

2.754

m3/h

Pressure Level

0.05

3.1

MPa

Sound Power Level

42

76

dBA

Type of Refrigerant

R404A, R410A, R407C

CO Emission

medium

medium

ppm

NOX Emission

high

high

ppm

Investment Cost

380

8.533

€/kW

Operating Cost

1.16

34.79

€/kW

Replacement Cost

low

low

€/year

Life Expectancy

15

20

years

Deterioration Description
Causes
Parameter
Degradation Rate
Measurement


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