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This study aims to compare two commonly used ASHP (air-source heat pump) and DX-GSHP (direct-expansion ground-source heat pump). There have been many debates on energy efficiency, system costs and relative payback period of DX-GSHP against ASHP systems over the past few years. In this context, and with the aim of enriching this debate, a detailed screening heat pump model previously developed.
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The key to the efficiency of a GSHP is the Coefficient of Performance: the “CoP”. In spite of the first law of thermodynamics, which tells us that energy can neither be created nor destroyed, a GSHP in a good installation can yield up to four units of heat for each unit of electricity consumed. The heat pump is not creating this energy, but merely separating a medium temperature from the.
For the purpose of this specification, COP will be calculated for closed loop and open loop systems in accordance with the International Standards Organization (ISO) Test Standard 13256-1 or 13256-2 as stated in Section 5 below. For DGX systems, COP will be calculated in accordance with the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) 870 conditions.
Ground Source Heat Pump: Green Energy Made Affordable Ground source heat pumps are an effective as well as environmentally friendly investment that can help you save up to 50% on heating bills when compared to conventional heating systems. Initial investments are high, but the ground source heat pump prices vary depending on the project. There are several different types of ground source heat.
A ground source heat pump system is one of the high-efficient technologies for space heating and cooling since it uses stable underground temperature. However, in actual application, many situations cannot be achieved due to the unsuitable design of operation. In particular, the design characteristics of buildings with different building load patterns are not reflected by the conventional.
It was also identified that COP values of the GSHP are higher than those for conventional air-air heat pumps, specifically when applied to these low temperature conditions. The COPHP and COPSYS were found to be between 2.3-3.8 and 2-3.5 respectively, with their value being highly dependent on the temperature within the greenhouse. The study identified that, in this district, the integration of.