Impact of uncertainties on estimations of heat pump cycle performance

Högberg, Marine, 1962 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Vamling, Lennart, 1954 (författare): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

Relaterad länk:: http://dx.doi.org/10...; visa fler...; https://doi.org/10.1...; https://research.cha...; visa färre...

Abstract Ämnesord

Stäng

Sensitivity analysis is used to show how uncertainties in basic factors, such as heat transfer, pressure drop,compressor efficiency, and thermophysical properties, influence the result of heat pump cycle performanceestimations. By comparing the results of this analysis with uncertainty levels of estimations and experimental determinations, it is established to what extent improvements in accuracy are needed. The investigation was carried out for several different applications and, as working fluids, both pure substances and non-azeotropic mixtures were examined. It was found that evaporation heat transfer and compressor efficiency are two areas where improvements are needed. It is also shown that estimates using very accurate, substance-specific, equations of state differ from those using more general types by up to 1 % for COP and 2% for capacity.

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Kemiteknik; och Kemiska processe ...

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