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020 _aTHE0009408 (Local)
_qHardback
040 _aUMP
_beng
_cUMP
_erda
090 _aFTKMA.F33 2021 r Thesis
100 1 _aAhmad Fadzil Sharol,
_eauthor.
245 1 0 _aIntegrated cross-matrix absorber-phase change material in double-pass solar air heater /
_cAhmad Fadzil Sharol
264 _aPahang :
_bUMP,
_c2021
264 _c© 2021
300 _axxi, 205 pages :
_bIllustration ;
_c30 cm. +
_e1 CD-ROM
336 _atext
_2rdacontent
336 _atext
_2rdacontent
337 _aunmediated
_2rdamedia
337 _acomputer
_2rdamedia
338 _avolume
_2rdacarrier
338 _acomputer disc
_2rdacarrier
347 _atext file
_bPDF
_2rda
500 _aFaculty of Mechanical and Automotive Engineering Technology
502 _aThesis (Doctor of Philosophy) -- Universiti Malaysia Pahang – 2021
504 _aIncludes bibliographical reference
520 3 _aThe intermittent nature of solar radiation required a solar heater design that can effectively harness the radiant energy and convert it into useful heat. This is especially true when one needs to consider the application of solar energy source related devices in the tropical climatic condition of Malaysia. Therefore, this study aims to design, fabricate and investigate the performance of solar air heater of cross-matrix absorber (CMA) with latent heat energy storage material in the form of phase change material (PCM) integration. The performances of four different types of solar air heaters were investigated. The first test has been done on the influence of staging and zigzag arrangement of square aluminium tube absorber from the single-pass solar air heater with cross-matrix absorber (SPSAH-CMA) configuration. In addition, the heat transfer performance of the solar air heater with the best tube arrangement was evaluated based on the double-pass solar air heater with cross-matrix (DPSAH-CMA) configuration. The comparison studies were conducted between all solar air heaters at an identical operating condition, with the reference made with the conventional flat plate DPSAH. The mathematical modelling of the physical system has been developed, and technoeconomic evaluation has been performed on the DPSAH-CMA configurations. Based on the indoor experimental work, at a mass flow rate of 0.005 kg/s, besides having a large cumulative heat gained rate of 6.12 kW at 900 W/m2, DPSAH-CMA-with PCM was superior as compared to the other solar air heater designs in terms of thermal buffer capability and thermal storage efficiency. The thermal buffer and storage efficiency of DPSAH-CMA-with PCM were -0.81 °C/min and 60%, respectively. Evaluation of convection heat transfer coefficient also revealed that a higher value of 88.87 W/m2 K at a low temperature difference of 7.13°C for DPSAH-CMA-with PCM contributed to better heat transfer and storage performances. In terms of analysis of top losses, the lower average of top loss value of 10.00 W/m2 K by DPSAH-CMA-with PCM led to the higher thermal efficiency value of 68.80%. This value was 5.01%, 15.48% and 17.88% higher than DPSAH-CMA-without PCM, SPSAH-CMA-staging and SPSAH-CMA-zigzag tube configuration, respectively. Evaluation under outdoor conditions revealed that the DPSAH-CMA-with PCM provides a better thermal buffer for stabilizing the output temperature profile at a mass flow rate of 0.004 kg/s. DPSAHCMA-with PCM achieved a better thermal buffer of -0.52 °C/min than other SAHs at the solar irradiance level of 660 W/m2. The maximum achievable value of thermal efficiency for DPSAH-CMA-with PCM and -without PCM was calculated to be 44.97% and 27.00%, at a solar irradiance of 400 W/m2 and 320 W/m2, respectively. The mathematical model is developed based on the K-value method derived from the Nils’ correlation for DPSAH-CMA configuration. The cost-benefit ratio for DPSAH-CMA-with PCM was determined to be 0.17 RM/kWh. In conclusion, the application of DPSAH-CMA-with PCM proved beneficial to the application of solar-related drying processes, especially in the tropical climatic condition country such as Malaysia.
610 2 0 _aFaculty of Mechanical and Automotive Engineering Technology
650 0 _aUniversities and colleges
650 0 _aThesis
942 _2lcc
_cRESTRICT