The investigation of energy saving and thermal comfort by using heat pipe in air-conditioning system

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The investigation of energy saving and thermal comfort by using heat pipe in air-conditioning system

 

Author: Chang, Yu
Title: The investigation of energy saving and thermal comfort by using heat pipe in air-conditioning system
Degree: M.Eng.
Year: 2015
Subject: Air conditioning -- Energy conservation.
Air conditioning -- Design and construction.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Building Services Engineering
Pages: vi, 102 pages : illustrations (some color)
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2826125
URI: http://theses.lib.polyu.edu.hk/handle/200/8221
Abstract: With the wide application of air conditioning equipment and the rapid increase of energy consumption in air conditioning buildings, the situation of energy deficiency is very severe. Thus, reduce the energy consumption in air conditioning building by the use of new energy-efficient technology and equipment is an urgent task for the research work. Employing heat pipe exchanger as air handling equipment in conditioning system, this paper investigates the energy consumption of a central air-conditioning system with primary return air. The study shows that compared with conventional central air-conditioning system with primary return air, a central air-conditioning system with primary return air by using heat pipe can decrease the peak cooling load, the capacity of refrigerator, and the energy consumption of air conditioning system without increasing the operating energy consumption of additional equipment and using the reheater causing energy loss occurred in cooling and reheating processes of air by means of the heat recovered from outside air to pre-cool outside or mixed air and to reheat supply air in air handling process. It has a great potential on energy saving.Furthermore, this paper presents the effect of indoor design temperature and relative humidity on thermal comfort and energy consumption. The study shows that under the same indoor thermal comfort condition, a conventional central air-conditioning system cannot decrease energy consumption just through increasing indoor temperature in summer. This disadvantage can be improved by heat pipe air-conditioning system, in which indoor thermal comfort equations under different working conditions are introduced by curve fitting method.

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