A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants
Abstract In seawater desalination, the energy efficiency of practical processes is expressed in kWh_electricity or low-grade-heat per m3 of water produced, omitting the embedded energy quality underlying their generation processes. To avoid thermodynamic misconceptions, it is important to recognize...
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Nature Portfolio
2021
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oai:doaj.org-article:33dc151e2f4a446282fb1205cb033c062021-12-02T14:21:11ZA thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants10.1038/s41545-021-00114-52059-7037https://doaj.org/article/33dc151e2f4a446282fb1205cb033c062021-04-01T00:00:00Zhttps://doi.org/10.1038/s41545-021-00114-5https://doaj.org/toc/2059-7037Abstract In seawater desalination, the energy efficiency of practical processes is expressed in kWh_electricity or low-grade-heat per m3 of water produced, omitting the embedded energy quality underlying their generation processes. To avoid thermodynamic misconceptions, it is important to recognize both quality and quantity of energy consumed. An unmerited quantitative apportionment can result in inferior deployment of desalination methods. This article clarifies misapprehensions regarding seeming parity between electricity and thermal sources that are sequentially cogenerated in power plants. These processes are represented by heat engines to yield the respective maximum (Carnot) work potentials. Equivalent work from these engines are normalized individually to give a corresponding standard primary energy (Q SPE), defined via a common energy platform between the adiabatic flame temperature of fuel and the surroundings. Using the Q SPE platform, the energy efficiency of 60 desalination plants of assorted types, available from literature, are compared retrospectively and with respect to Thermodynamic Limit.Kim Choon NgMuhammad BurhanQian ChenDoskhan YbyraiykulFaheem Hassan AkhtarM. KumjaRobert W. FieldMuhammad Wakil ShahzadNature PortfolioarticleWater supply for domestic and industrial purposesTD201-500ENnpj Clean Water, Vol 4, Iss 1, Pp 1-10 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
Water supply for domestic and industrial purposes TD201-500 |
| spellingShingle |
Water supply for domestic and industrial purposes TD201-500 Kim Choon Ng Muhammad Burhan Qian Chen Doskhan Ybyraiykul Faheem Hassan Akhtar M. Kumja Robert W. Field Muhammad Wakil Shahzad A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants |
| description |
Abstract In seawater desalination, the energy efficiency of practical processes is expressed in kWh_electricity or low-grade-heat per m3 of water produced, omitting the embedded energy quality underlying their generation processes. To avoid thermodynamic misconceptions, it is important to recognize both quality and quantity of energy consumed. An unmerited quantitative apportionment can result in inferior deployment of desalination methods. This article clarifies misapprehensions regarding seeming parity between electricity and thermal sources that are sequentially cogenerated in power plants. These processes are represented by heat engines to yield the respective maximum (Carnot) work potentials. Equivalent work from these engines are normalized individually to give a corresponding standard primary energy (Q SPE), defined via a common energy platform between the adiabatic flame temperature of fuel and the surroundings. Using the Q SPE platform, the energy efficiency of 60 desalination plants of assorted types, available from literature, are compared retrospectively and with respect to Thermodynamic Limit. |
| format |
article |
| author |
Kim Choon Ng Muhammad Burhan Qian Chen Doskhan Ybyraiykul Faheem Hassan Akhtar M. Kumja Robert W. Field Muhammad Wakil Shahzad |
| author_facet |
Kim Choon Ng Muhammad Burhan Qian Chen Doskhan Ybyraiykul Faheem Hassan Akhtar M. Kumja Robert W. Field Muhammad Wakil Shahzad |
| author_sort |
Kim Choon Ng |
| title |
A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants |
| title_short |
A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants |
| title_full |
A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants |
| title_fullStr |
A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants |
| title_full_unstemmed |
A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants |
| title_sort |
thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/33dc151e2f4a446282fb1205cb033c06 |
| work_keys_str_mv |
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