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2. PHD Thesis / Tesis PHD
3. Solar Energy Research Institute / Institut Penyelidikan Tenaga Suria (SERI)

Title:	Optimization of solar assisted adsorption air conditioning system utilizing activated carbon fiber / ethanol as the refrigeration pair for hot and humid climate
Authors:	Alkhair Mohammed Abdulmajeed (P57158)
Supervisor:	Lim Chin Haw, Ar. Dr.
Keywords:	Carbon fiber Ethanol Solar air conditioning
Issue Date:	28-Nov-2016
Description:	Air conditioning system is one of the major consumers of electrical energy consumption in many hot and humid climate regions around the world. The demand for cooling energy is the main reason that caused the effect of global warming as most of the electrical energy generation comes from fossil fuel which is the primary cause of carbon dioxide emission to the environment. Therefore, an urgent need is required to change the air conditioning systems from fossil fuel energy to greener energy source. So that, a new technologies should be developed and applied to overcome some of conventional air conditioning systems which are currently used in the building sector. These alternative systems should be environmentally friendly and efficient to reduce the global warming and/or electricity costs. Solar energy has great potential in supplying sustainable energy source which can be used in driving solar assisted air conditioning systems. There are mainly two types of solar assisted air conditioning systems namely the solar absorption and solar adsorption cooling system. Solar assisted adsorption air conditioning system utilizing activated carbon fiber and ethanol as the refrigeration pair. A prototype system has been designed, fabricated and tested under local hot and humid climatic conditions. The main objective of this thesis is to enhance the performance of the adsorption air conditioning system that is directly driven by solar energy as the main source of heat collected by using evacuated tube solar collector. To fulfill the objectives of the thesis, both theoretical and experimental analyses have been presented with variable operating conditions under local weather conditions and cooling load. High temperature of inlet hot water into the system could improve the efficiency and the performance as well as increasing the COP. Besides that, the design of condenser and evaporator with an optimized adsorption bed will also enhance the overall performance. The test rig was designed and fabricated based on the fundamentals of heat and mass transfer. The most effective parameters that influence the efficiency as well as the performance of the system are the hot water inlet temperature, the cooling water inlet temperature, the switching time and the amount of ethanol. It was found that the adequate amount of ethanol is 700 g, and the optimum inlet hot water and cooling water temperatures are 85 and 25°C respectively. The optimum cycle switching time between the two adsorption beds for the system is 5 min. The outlet chilled water temperature could reach 16.3°C after 10 cycles. The indoor and outdoor temperatures and humidity also been investigated during the operating of the adsorption air conditioning system with the electricity consumption of water pumps and control valves.,Certification of Master's/Doctoral Thesis" is not available
Pages:	221
Call Number:	TH7687.9.A237 2016 3 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Solar Energy Research Institute / Institut Penyelidikan Tenaga Suria (SERI)

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