24 June 2014

Development of Thermally-Driven Ground Source Heat Pump Concept

This paper outlines design considerations and initial results from the development of a thermally-driven Ground Source Heat Pump concept, targeting residential and small- commercial applications. This concept employs a novel Binary Fluid Ejector (BFE)
technology. The BFE-GSHP is projected to offer operating cost savings versus baseline
heating and cooling systems and, in most regions, versus conventional electrically-driven
GSHPs as well. As a thermally-driven compression process, COP is inversely proportional
to compression ratio, therefore an application with a steadier and smaller temperature lift
(Tcond – Tevap) is better suited for a BFE system. This makes a ground source heat pump
system more suitable than an air source heat pump system for BFE space heating and
cooling applications.