School of Mechanical and Industrial Engineering

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Browsing School of Mechanical and Industrial Engineering by Author "Abdi, Mirgissa"

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    Optimization of A Heat Pump for A Hybrid Pvt-Heat Pump System; A Case Study for Bale Mountains Lodge
    (AAU, 2017-10) Abdi, Mirgissa; Demiss, Alemu (PhD)
    As a greater part of the globe is facing the wrath of environmental illnesses, it is an undeniable fact that the new technologies coming into light should always play the role of curing the short comings faced related to these environmental problems. In line with this, there has been a set of laws and regulations that forces environmentally friendly lodges or eco-lodges to implement or put in place any form of equipment or technology that won’t be an additional burden to the ecology. Putting this in perspective and considering the requirement from the site under analysis, a PVT-assisted heat pump has been recommended for the location under study. In this thesis, as an extension of an existing research on the analysis concerned with the photovoltaic-thermal section, the final hot water output from the PVT panel has been used as an inlet working fluid to which more heat (thermal ) energy would be added to come up with the required final domestic hot water temperature. In order to come up with the necessary results, the MATLAB code has been used for simulation. As an input for the analysis, a heat pump manufacturer’s data based on inlet water and ambient temperature has been used. The study analyzes the performance of the proposed system without a thorough look into the thermophysical property analysis of each component. Using the data from the manufacturer and the corresponding information of the location, a COP and Compressor Power surface plot has been generated. Utilizing that, thermal power from the heat pump has been developed for every hour of the year under study. And finally, a heat balance undertaken at the storage tank receiving the output heat from the heat pump has given the required raise in temperature of the water required for domestic use. the results from the generated code have shown that the parallel use of ten heat pumps simultaneously working to increase the temperature have come up with the required domestic hot water temperature. Finally, a total of ten heat pumps have been found to perfectly meet the required temperature in the storage tank. And it has also been observed that these heat pumps will operate simultaneously to come up with the required property of the domestic hot water lying between temperature ranges of 318 K and 343 K.