Design and Analysis of a Solar Driven Vapour Absorption Refrigeration System as an Alternative to Solar PV Powered Refrigerators
Science Journal of Energy Engineering
Volume 7, Issue 1, March 2019, Pages: 1-12
Received: Mar. 11, 2019;
Accepted: Apr. 26, 2019;
Published: May 20, 2019
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Ogbonda Douglas Chukwu, Department of Electrical Electronics Engineering Technology, School of Engineering Technology, Captain Elechi Amadi Polytechnic, Port Harcourt, Nigeria
Fubara Ibinabo, Department of Electrical Electronics Engineering Technology, School of Engineering Technology, Captain Elechi Amadi Polytechnic, Port Harcourt, Nigeria
Raphael Okosiemiema, Department of Electrical Electronics Engineering Technology, School of Engineering Technology, Captain Elechi Amadi Polytechnic, Port Harcourt, Nigeria
There exists an immense need around the world for refrigeration capabilities where the infrastructure of dependable power does not exist. In this study, the concept of a flat plate collector for an intermittent ammonia absorption refrigeration system is analyzed. The design is juxtaposed against a solar photo-voltaic powered refrigerator to evaluate its feasibility. Relevant design equations, codes, standards and procedures were integrated to develop a system that would boil off approximately 0.34kg of ammonia from 0.553kg of calcium chloride capable of producing 0.91kg of ice. The results showed that a collector area of 0.93m2 was needed to produce the 782.4kJ of heat required, the required condenser volume was calculated to be 28.4 liters, and the evaporator volume to hold the ammonia calculated to be 0.51 liters (Length = 0.4 m, D = 40 mm). The copper fin – steel pipe stress due to thermal expansion of the system was calculated to be 59.159 MPa which was below, 249.944 MPa, the maximum allowable stress of the material. The system was designed to have a maximum operating pressure of 9653 kPa. In a test, the final prototype attained consistent generator temperatures in the 364 - 378K range and once switched to the “night cycle” attained evaporator temperatures in the 0°C to -7°C range thus confirming the concept of the flat design (the primary objective) as well producing consistent evaporator temperatures below 0°C (the secondary objective).
Ogbonda Douglas Chukwu,
Design and Analysis of a Solar Driven Vapour Absorption Refrigeration System as an Alternative to Solar PV Powered Refrigerators, Science Journal of Energy Engineering.
Vol. 7, No. 1,
2019, pp. 1-12.
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