This work deals with the comparison of different optimized configurations of solar-assisted
ground-source CO 2 heat pump systems using the Taguchi method and Grey Relational …

Natural refrigerants are attractive candidates for replacing the high Global-Warming-
Potential fluorinated refrigerants used in ground-source heat pumps (GSHPs). This paper …

This paper presents the work on develo** accurate and computationally efficient PCHE off-
design quasi-steady state performance models for both recuperator and pre-cooler in a …

In this article, the effects of using expander and Internal Heat Exchanger (IHE) have been
investigated numerically in a horizontal Direct-Expansion Geothermal Heat Pump (DX …

A transient coupled model for a variable speed CO 2 direct expansion ground source heat
pump (DX-GSHP) is developed. An annual simulation for integrated space heating and …

Recently, the use of natural refrigerants in air conditioners and heat pumps has raised
special interest from industry and the scientific community. It is seen as one of the most …

An analytical model for the calculation of fluid temperature profiles in geothermal boreholes
with multiple U-tubes is presented. A linear system of first order differential equations is built …

In this paper, a numerical simulation model has been extended for analyzing the energy and
exergy of direct-expansion geothermal heat pumps (DX-GHP) in domestic hot water and …

CO 2-based ground-source heat pumps (GSHPs) have the potential to be very
environmentally friendly, since GSHPs operate with high energy efficiency, and CO 2 has no …

The present paper deals with a comparative exergo-economic analysis among four different
horizontal Direct-Expansion Geothermal Heat Pumps (DX-GHP) with Carbon Dioxide (CO 2) …