Download Applications and Efficiency of Heat Pump Systems: by V. R. Pendyala, V. S. Patwardhan (auth.), I. E. Smith (eds.) PDF

By V. R. Pendyala, V. S. Patwardhan (auth.), I. E. Smith (eds.)

The papers during this assortment have originated from Britain, japanese and Western Europe and India, with the delegates coming from fifteen nations, together with a powerful contingent from Japan. this means a frequent curiosity within the program of warmth pumps. the warmth pump suffers from an environmental dichotomy. at the one hand it saves fossil gasoline strength, thereby decreasing CO emissions. nonetheless, within the vapour compression shape, 2 it typically employs CFCs that are harmful to our protecting ozone layer in addition to contributing to the greenhouse impact. Taking the 1st, warmth pumps, might be have the widest program numerically within the heating (and cooling) of structures and a very good paper describes case reports referring to 3 huge Norwegian inns. In those, warmth used to be pumped from the adjoining river or sea whilst heating was once required, and through the summer time, while cooling turned invaluable, to generate family scorching water. the warmth pumps have been put in through SINTEF Refrigeration Engineering, Norway, and feature validated payback sessions of approximately years. The fractional overall power saving of the 3 lodges used to be 30% for this reason, a powerful determine, certainly. the same paper by means of a Belgian architectural consortium exhibits how this method should be effectively utilized to the cooling of a giant tv complicated the place significant amounts of warmth have been being generated through the luminaries. during this workout the cooling load was once effectively pumped to supply scorching water.

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Additional resources for Applications and Efficiency of Heat Pump Systems: Proceedings of the 4th International Conference (Munich, Germany 1–3 October 1990)

Example text

Condenser pressures are controlled so as to divide the condensation load between the two condensers. The complete thermodynamic cycle for this system is superimposed on the P-H-z diagram, Figure 2. 9 bara (C2). 1, and the diagram shows the split in composition achievable using the two-condenser system. j:>. U1 ').. If SV CV RV NO NC SIC RIC WI EI - Fig. 1 :" - -[RIC 110 NC CVI @ I 9 SV2 ! --- t . I ,I -----+1\ 1:A=II . ER CONDCNSER.. ~! / "r;::A t-- ) SOlENOID(CHANGEOVER)VAlVE CONTROL VALVE RElIEFVAlVE NORM All Y OPEN NORMAllY CLOSED STROKEINDICATOR/CONTROllER RATIO INDICATOR/CONTROllER COOLING WAT£R ENERGy INDICATOR KEY TO DIAGRAM SYMBOLS ~gArf> LOAD ® ----.

The design parameters of the heat pump were determined as follows: Heat source (cooling water) Heat sink (wash water): 25/5 "C 15/85 "C The big temperature gap to be bridged over \80 °C), the of the heat sink (85 "C), and last but not least temperature change of the external media, especially sink (70 "C), make the task expressly suitable for advantages of hybrid heat pumping. high temperature the significant that of the heat emphasizing the Thorough theoretical investigations [13, 15, 18, 19] and laboratory examination of processes in the heat exchangers [16] preceded the establishment of the pilot plant.

5 m. The potential advantages of using a nonazeotropic mixture as working fluid have been widely studied (Berntsson and Schnitzer 1984; Ofner et al. 1986; Patwardhan et al. 1987). Redermacher (1986) has proposed heat pump schemes utilising a solution circuit to achieve high outlet temperatures from a vapour compression system whilst retaining a low pressure ratio. p. over a conventional single-fluid heat pump. The advantages that accrue have been shown by Patwardhan (1987) to be very sensitive to the working fluid composition.

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