Abstract
Air source heat pump is one of the most popular heat pump systems. This chapter starts with the discussion of heat rejection and heat absorption operations of air source heat pump. Power consumption of key components of the heat pump is also examined. Then the operations of water-to-water heat pumps are discussed. Heat pumps are devices that operate in the vapor compression refrigeration system. Energy and exergy analysis are important in investigating vapor compression refrigeration system. With advanced technology, heat pump is capable to provide many functions. The basic functions of heat pump are heating and cooling. Water-to-water heat pump is capable to provide both hot water for heating and chilled water for cooling. However, the water-to-water heat pump is unable to apply to system that does not have a balance demand for heating and cooling. With recent heat pump technology, total energy heat pump is available to serve chilled water and hot water plant and is capable to produce chilled water and hot water to meet fluctuating cooling and heating demand. A case study on hotel is employed to illustrate the application of total energy heat pump.
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Abbreviations
- A :
-
Area
- COP:
-
Coefficient of performance
- C p :
-
Specific heat
- dp:
-
Total pressure
- \(\dot{E}\) :
-
Energy rate
- h 1 :
-
Specific enthalpy at stage 1
- h 2 :
-
Specific enthalpy at stage 2
- h 3 :
-
Specific enthalpy at stage 3
- h 4 :
-
Specific enthalpy at stage 4
- ∆h (h2−h1):
-
Enthalpy difference stage 2 and stage 1
- HR:
-
Heat rejection
- \(\dot{m}\) :
-
Mass flow rate
- η :
-
Efficiency
- q :
-
Air volume delivered
- Q :
-
Output capacity
- \(\dot{Q}\) :
-
Heat transfer rate
- U :
-
Overall heat transfer coefficient
- W :
-
Power input (W)
- \(\dot{W}\) :
-
Power
- \(\dot{W}_{\text{i}}\) :
-
Compression indicated power
- comp:
-
Compressor
- cond:
-
Condenser
- dest:
-
Destroy (or destruction)
- fan:
-
Fan
- eva:
-
Evaporator
- ht:
-
Heat exchanger
- in:
-
Inlet (or input)
- out:
-
Outlet (or output)
- r:
-
Refrigerant
- w:
-
Water
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Lun, Y.H.V., Tung, S.L.D. (2020). Total Energy Heat Pump. In: Heat Pumps for Sustainable Heating and Cooling. Green Energy and Technology. Springer, Cham. https://doi.org/10.1007/978-3-030-31387-6_5
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DOI: https://doi.org/10.1007/978-3-030-31387-6_5
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