Exergy analysis of evaporative cooling for reducing energy use in a Malaysian building

Taufiq, B.N.; Masjuki, H.H.; Mahlia, T.M.I.; Afifi, Amalina M.; Faizul, Mohamad; Saidur, R.

doi:10.1016/j.desal.2007.04.033

Cited by 31 publications

(8 citation statements)

References 3 publications

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“…Pendingin evaporatif terjadi akibat penguapan air pada permukaan bebas dengan bantuan aliran udara (Pearlmutter et al, 2008). Keunggulan sistem pendingin evaporatif adalah tidak menggunakan energi komersial (yang mahal dan sulit ditemukan di lokasi panen), rendah energi, dan tidak memerlukan biaya investasi yang tinggi karena dapat dilakukan dengan memodifikasi gudang penyimpanan yang telah dimiliki petani, serta tidak merepotkan petani dengan keperluan tingkat keahlian tertentu (Taufiq et al, 2007). Selain itu, menurut Wang (2007), sistem pendingin evaporatif yang ada saat ini memiliki kelemahan, yaitu distribusi suhu yang kurang merata dalam ruang penyimpanan dingin.…”

Section: Pendahuluanunclassified

Disain dan Uji Kinerja Pendingin Evaporatif Tipe Aliran Searah Menggunakan CFD (Computational Fluid Dynamics)

Yuliasari

Syska

Ropiudin

2021

JTEP-L

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After harvesting, fruits will change due to physiological, physical, chemical, and microbiological influences, and they are living materials. Therefore, it is necessary to know how to harvest and handle fresh fruits and their storage conditions to handle the fruits after harvesting so that the quality of the products can be maintained. One of the first treatments in the fruit cold chain is evaporative cooling. In order to get an evaporative cooling system that has an even temperature distribution, it is necessary to make a spatial model when designing an evaporative cooling system using CFD (Computational Fluid Dynamics). The objectives of this research are: (1) design of direct flow type evaporative cooling systems and (2) test the performance of direct flow type evaporative coolers. This research method uses design methods, experiments, and computer simulations. The results showed the performance of the evaporative cooler system in the scenario with the roof on, the highest effectiveness value was 1.198, the highest approximation value was 2.832, and the highest range value was 4.589. In the scenario without a roof on the evaporative cooler system, the highest effectiveness value was 1.767, the highest approach value was 2.139, and the highest range value was 4.835. The CFD analysis in the scenario with a roof had the highest temperature value of 25.9 ° C and the lowest temperature of 21.9 ° C, while the CFD analysis in the scenario without roof had the highest temperature of 23.7 ° C and the lowest temperature of 20.4 ° C. Keywords: CFD, direct flow type, evaporative cooler, quality, fruit

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Section: Pendahuluanunclassified

Disain dan Uji Kinerja Pendingin Evaporatif Tipe Aliran Searah Menggunakan CFD (Computational Fluid Dynamics)

Yuliasari

Syska

Ropiudin

2021

JTEP-L

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“…Analysis of exergy losses provides information as to where the real inefficiencies in a system lie so as to detect and evaluate quantitatively the losses that occur in thermal and chemical processes. The identification of the inefficiencies and their sources allows having an effective management and optimization of thermal systems [9].…”

Section: Exergy Analysismentioning

confidence: 99%

Syngas Production and Losses Encountered in Gasification of Rice Husks

Kasembe¹,

Mganilwa²,

John³

et al. 2015

JPEE

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This paper addresses the syngas production and evaluation losses in high temperature gasification process using coffee husks. A fast and inexpensive way to evaluate the losses in gasification processes is by the application mathematical models which allow to predict the values needed in full scale. Hence, the quantification of gasifier's losses at temperatures ranges of 800 K-1400 K at an equivalence ratios of 0.3, 0.35 and 0.4 at 1 bar are revealed by using exergy model incorporating a chemical equilibrium model. The model evaluated the product syngas compositions, syngas heating values and degree of irreversibility values (losses). The results from the model showed that the production of H2 increased from 9.9% to 18.9% and the formation of CO2 ranges from 7.2% to 12.3%. CO production is from 21.8% to 17.2%. The irreversibility values obtained were less than 27%. Hence, reduction of losses protracts biomass resources to be used in energy generation.

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“…Saidur et al focused on developing energy guide label for domestic refrigerators [8], energy and exergy analysis of residential, transport and commercial sectors [9][10][11] and on greenhouse gas emissions from household appliances [12]. Taufiq et al [13] presented an exergy analysis of evaporative cooling in Malaysian buildings. The present study is on investigating the Malaysian scenario of energy resources, energy consumption pattern, available schemes of energy conservation and management in various key consumption sectors.…”

Section: Introductionmentioning

confidence: 99%