Modelling performance of ocean-thermal energy conversion cycle according to different working fluids
Ocean Thermal Energy Conversion (OTEC) is a promising renewable energy technology with the concept to harness the energy stored at the surface seawater (SSW) and the cold deep seawater (DSW). The operation is based on the Rankine cycle, and involves at a minimum temperature difference of 20 K of the...
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my.utm.700042017-11-14T06:23:15Z http://eprints.utm.my/id/eprint/70004/ Modelling performance of ocean-thermal energy conversion cycle according to different working fluids Samsuri, N. Shaikh Salim, S. A. Z. Musa, M. N. Mat Ali, M. S. TC Hydraulic engineering. Ocean engineering Ocean Thermal Energy Conversion (OTEC) is a promising renewable energy technology with the concept to harness the energy stored at the surface seawater (SSW) and the cold deep seawater (DSW). The operation is based on the Rankine cycle, and involves at a minimum temperature difference of 20 K of the SSW and DSW to generate electricity. This research focuses on the economic efficiency of different working fluids used in the OTEC Rankine cycle. The various working fluids include ammonia, ammonia-water mixture (0.9), propane, R22, R32, R134a, R143a, and R410a. Most of the existing commercial OTEC systems use ammonia as the working medium despite its toxic nature. This study shows that the ammonia-water mixture still gives the best results in terms of heat transfer characteristics because of its greater transport properties and stability compared to other fluids. However, fluids such as propane and R32 can also be used as a substitute for ammonia-water mixture despite having slightly lower efficiency, because they are non-toxic and safer towards the environment. The same developmental model was used to present the proposed modified OTEC Rankine cycle, which shows a 4% increase in thermal cycle efficiency. This study reveals economically efficient and environmentally friendly working fluids. Penerbit UTM Press 2016 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/70004/1/NorazreenSamsuri2016_ModellingPerformanceofOceanThermalEnergy.pdf Samsuri, N. and Shaikh Salim, S. A. Z. and Musa, M. N. and Mat Ali, M. S. (2016) Modelling performance of ocean-thermal energy conversion cycle according to different working fluids. Jurnal Teknologi, 78 (11). pp. 207-215. ISSN 0127-9696 http://dx.doi.org/10.11113/.v78.8741 DOI:10.11113/.v78.8741 |
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TC Hydraulic engineering. Ocean engineering Samsuri, N. Shaikh Salim, S. A. Z. Musa, M. N. Mat Ali, M. S. Modelling performance of ocean-thermal energy conversion cycle according to different working fluids |
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Ocean Thermal Energy Conversion (OTEC) is a promising renewable energy technology with the concept to harness the energy stored at the surface seawater (SSW) and the cold deep seawater (DSW). The operation is based on the Rankine cycle, and involves at a minimum temperature difference of 20 K of the SSW and DSW to generate electricity. This research focuses on the economic efficiency of different working fluids used in the OTEC Rankine cycle. The various working fluids include ammonia, ammonia-water mixture (0.9), propane, R22, R32, R134a, R143a, and R410a. Most of the existing commercial OTEC systems use ammonia as the working medium despite its toxic nature. This study shows that the ammonia-water mixture still gives the best results in terms of heat transfer characteristics because of its greater transport properties and stability compared to other fluids. However, fluids such as propane and R32 can also be used as a substitute for ammonia-water mixture despite having slightly lower efficiency, because they are non-toxic and safer towards the environment. The same developmental model was used to present the proposed modified OTEC Rankine cycle, which shows a 4% increase in thermal cycle efficiency. This study reveals economically efficient and environmentally friendly working fluids. |
format |
Article |
author |
Samsuri, N. Shaikh Salim, S. A. Z. Musa, M. N. Mat Ali, M. S. |
author_facet |
Samsuri, N. Shaikh Salim, S. A. Z. Musa, M. N. Mat Ali, M. S. |
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Samsuri, N. |
title |
Modelling performance of ocean-thermal energy conversion cycle according to different working fluids |
title_short |
Modelling performance of ocean-thermal energy conversion cycle according to different working fluids |
title_full |
Modelling performance of ocean-thermal energy conversion cycle according to different working fluids |
title_fullStr |
Modelling performance of ocean-thermal energy conversion cycle according to different working fluids |
title_full_unstemmed |
Modelling performance of ocean-thermal energy conversion cycle according to different working fluids |
title_sort |
modelling performance of ocean-thermal energy conversion cycle according to different working fluids |
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Penerbit UTM Press |
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2016 |
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http://eprints.utm.my/id/eprint/70004/1/NorazreenSamsuri2016_ModellingPerformanceofOceanThermalEnergy.pdf http://eprints.utm.my/id/eprint/70004/ http://dx.doi.org/10.11113/.v78.8741 |
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