DESIGN AND FABRICATION OF GEO-THERMAL SPACE HEATING AND COOLING SYSTEM

Abstract

Ground-source heat pump systems are one of the promising new energy technologies that can be a sustainable solution for ongoing energy crisis in Pakistan. The purpose of this study is to build a working model of geothermal space cooling & heating system for energy savings and demand reduction for residential, school and commercial building applications. The project deals in ground heat exchanger for extracting energy from ground, heat pump and delivering that energy to environment for space heating in winter and vice versa in summer. Ground-source heat pump systems make a significant contribution in energy saving and emission reductionand can be one of the promising new energy technologies that can be a sustainable solution for ongoing energy crisis in Pakistan. The purpose of this study is to build a working model of geothermal space cooling & heating system for energy savings and demand reduction for residential, educational and commercial building applications. The project deals in ground heat exchanger for extracting energy from ground, heat pump and delivering that energy to environment for space heating in winter and vice versa in summer. To make it a complete working model, temperatures of the soil, time required to change the temperature of the air in specified area and heat exchange through pipe and radiator considering losses in pipe are being calculated. The suitable material for pipe has been selected considering ground heat transfer and economics for different pipe materials. The length of the pipe has been determined depending on the heating and cooling load. The effect of flow rate on heat exchange and the length of the pipe has also been studied and a relationship between the pipe length and the heat exchange has been formulated.