Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working Fluids
Economic expedience of waste heat recovery systems (WHRS), especially for low temperature difference applications, is often questionable due to high capital investments and long pay-back periods. With a simple design, isobaric expansion (IE) machines could provide a viable pathway to utilizing other...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/14/5265 |
| _version_ | 1827623892079869952 |
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| author | Sander Roosjen Maxim Glushenkov Alexander Kronberg Sascha Kersten |
| author_facet | Sander Roosjen Maxim Glushenkov Alexander Kronberg Sascha Kersten |
| author_sort | Sander Roosjen |
| collection | DOAJ |
| description | Economic expedience of waste heat recovery systems (WHRS), especially for low temperature difference applications, is often questionable due to high capital investments and long pay-back periods. With a simple design, isobaric expansion (IE) machines could provide a viable pathway to utilizing otherwise unprofitable waste heat streams for power generation and particularly for pumping liquids and compression of gases. Different engine configurations are presented and discussed. A new method of modeling and calculation of the IE process and efficiency is used on IE cycles with various pure and mixed working fluids. Some interesting cases are presented. It is shown in this paper that the simplest non-regenerative IE engines are efficient at low temperature differences between a heat source and heat sink. The efficiency of the non-regenerative IE process with pure working fluid can be very high, approaching Carnot efficiency at low pressure and heat source/heat sink temperature differences. Regeneration can increase efficiency of the IE cycle to some extent. Application of mixed working fluids in combination with regeneration can significantly increase the range of high efficiencies to much larger temperature and pressure differences. |
| first_indexed | 2024-03-09T11:57:03Z |
| format | Article |
| id | doaj.art-f058961c641d495cb06f6519cc60d62e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T11:57:03Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f058961c641d495cb06f6519cc60d62e2023-11-30T23:08:51ZengMDPI AGEnergies1996-10732022-07-011514526510.3390/en15145265Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working FluidsSander Roosjen0Maxim Glushenkov1Alexander Kronberg2Sascha Kersten3Sustainable Process Technology, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The NetherlandsEncontech B.V. TNW/SPT, P.O. Box 217, 7500 AE Enschede, The NetherlandsEncontech B.V. TNW/SPT, P.O. Box 217, 7500 AE Enschede, The NetherlandsSustainable Process Technology, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The NetherlandsEconomic expedience of waste heat recovery systems (WHRS), especially for low temperature difference applications, is often questionable due to high capital investments and long pay-back periods. With a simple design, isobaric expansion (IE) machines could provide a viable pathway to utilizing otherwise unprofitable waste heat streams for power generation and particularly for pumping liquids and compression of gases. Different engine configurations are presented and discussed. A new method of modeling and calculation of the IE process and efficiency is used on IE cycles with various pure and mixed working fluids. Some interesting cases are presented. It is shown in this paper that the simplest non-regenerative IE engines are efficient at low temperature differences between a heat source and heat sink. The efficiency of the non-regenerative IE process with pure working fluid can be very high, approaching Carnot efficiency at low pressure and heat source/heat sink temperature differences. Regeneration can increase efficiency of the IE cycle to some extent. Application of mixed working fluids in combination with regeneration can significantly increase the range of high efficiencies to much larger temperature and pressure differences.https://www.mdpi.com/1996-1073/15/14/5265isobaric expansion enginesheat driven pumpcompressorslow-grade heatmixed working fluids |
| spellingShingle | Sander Roosjen Maxim Glushenkov Alexander Kronberg Sascha Kersten Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working Fluids Energies isobaric expansion engines heat driven pump compressors low-grade heat mixed working fluids |
| title | Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working Fluids |
| title_full | Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working Fluids |
| title_fullStr | Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working Fluids |
| title_full_unstemmed | Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working Fluids |
| title_short | Waste Heat Recovery Systems with Isobaric Expansion Technology Using Pure and Mixed Working Fluids |
| title_sort | waste heat recovery systems with isobaric expansion technology using pure and mixed working fluids |
| topic | isobaric expansion engines heat driven pump compressors low-grade heat mixed working fluids |
| url | https://www.mdpi.com/1996-1073/15/14/5265 |
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