Abstract
Modeling is very useful tool in order to predict the effect of the operating parameters like pipe length, radius, depth of burial and air flow rate on the thermal performance and heating/cooling capacity of earth-air heat exchanger (EAHE) systems. Till date many researchers have carried out a number of studies on calculation models for earth-air heat exchanger systems. The analysis of EAHE systems started with the development of one-dimensional models. The two-dimensional models came into practice during the 1990s and were replaced by three-dimensional models in recent years. Latest models are dynamic and technically more advanced which can provide room for all types of grid geometry to produce detailed thermal analysis of EAHE systems. This paper reviews on calculation models of EAHE systems as of the end of March, 2014.
Highlights
The present world energy scenario indicates that the conventional energy sources are depleting and per capita energy consumption is indication of living standard of a nation so, it becomes very important to find and explore nonconventional energy sources to meet the energy requirement of the society
This paper aims to review the current state of the art regarding calculation models of earth-air heat exchanger (EAHE) systems by going through research publications in scientific journals and conferences
The EAHE system if properly designed can be feasible and economical option to replace conventional air-conditioning systems as there is no need of compressors, burners, or chemicals and only blowers are required to move the air
Summary
The present world energy scenario indicates that the conventional energy sources are depleting and per capita energy consumption is indication of living standard of a nation so, it becomes very important to find and explore nonconventional energy sources to meet the energy requirement of the society. The nonconventional energy sources are better option of clean and sustainable energy. This kind of energy is, at principle, inexhaustible and can be found and exploited well on the planet [1]. The conventional air conditioners working on vapor compression refrigeration cycle are effective and most widely used means to achieve comfort conditions. In order to save our planet from hazardous effects of UV rays by minimizing depletion of the ozone layer, the world scientific community has developed eco-friendly refrigerants. To minimize depletion of the ozone layer and global warming and to reduce high grade energy consumption, numerous alternative techniques are being currently explored [2, 3]. One of the promising techniques is earth-air heat exchangers
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