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Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers
Comfortable, efficient, and affordable heating, ventilation, and air conditioning systems in buildings are highly desirable due to the demands of energy efficiency and environmental friendliness. Traditional vapor-compression air conditioners exhibit a lower coefficient of performance (COP) (typical...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5227918/ https://www.ncbi.nlm.nih.gov/pubmed/28079171 http://dx.doi.org/10.1038/srep40437 |
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author | Tu, Y. D. Wang, R. Z. Ge, T. S. Zheng, X. |
author_facet | Tu, Y. D. Wang, R. Z. Ge, T. S. Zheng, X. |
author_sort | Tu, Y. D. |
collection | PubMed |
description | Comfortable, efficient, and affordable heating, ventilation, and air conditioning systems in buildings are highly desirable due to the demands of energy efficiency and environmental friendliness. Traditional vapor-compression air conditioners exhibit a lower coefficient of performance (COP) (typically 2.8–3.8) owing to the cooling-based dehumidification methods that handle both sensible and latent loads together. Temperature- and humidity-independent control or desiccant systems have been proposed to overcome these challenges; however, the COP of current desiccant systems is quite small and additional heat sources are usually needed. Here, we report on a desiccant-enhanced, direct expansion heat pump based on a water-sorbing heat exchanger with a desiccant coating that exhibits an ultrahigh COP value of more than 7 without sacrificing any comfort or compactness. The pump’s efficiency is doubled compared to that of pumps currently used in conventional room air conditioners, which is a revolutionary HVAC breakthrough. Our proposed water-sorbing heat exchanger can independently handle sensible and latent loads at the same time. The desiccants adsorb moisture almost isothermally and can be regenerated by condensation heat. This new approach opens up the possibility of achieving ultrahigh efficiency for a broad range of temperature- and humidity-control applications. |
format | Online Article Text |
id | pubmed-5227918 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-52279182017-01-17 Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers Tu, Y. D. Wang, R. Z. Ge, T. S. Zheng, X. Sci Rep Article Comfortable, efficient, and affordable heating, ventilation, and air conditioning systems in buildings are highly desirable due to the demands of energy efficiency and environmental friendliness. Traditional vapor-compression air conditioners exhibit a lower coefficient of performance (COP) (typically 2.8–3.8) owing to the cooling-based dehumidification methods that handle both sensible and latent loads together. Temperature- and humidity-independent control or desiccant systems have been proposed to overcome these challenges; however, the COP of current desiccant systems is quite small and additional heat sources are usually needed. Here, we report on a desiccant-enhanced, direct expansion heat pump based on a water-sorbing heat exchanger with a desiccant coating that exhibits an ultrahigh COP value of more than 7 without sacrificing any comfort or compactness. The pump’s efficiency is doubled compared to that of pumps currently used in conventional room air conditioners, which is a revolutionary HVAC breakthrough. Our proposed water-sorbing heat exchanger can independently handle sensible and latent loads at the same time. The desiccants adsorb moisture almost isothermally and can be regenerated by condensation heat. This new approach opens up the possibility of achieving ultrahigh efficiency for a broad range of temperature- and humidity-control applications. Nature Publishing Group 2017-01-12 /pmc/articles/PMC5227918/ /pubmed/28079171 http://dx.doi.org/10.1038/srep40437 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Tu, Y. D. Wang, R. Z. Ge, T. S. Zheng, X. Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers |
title | Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers |
title_full | Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers |
title_fullStr | Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers |
title_full_unstemmed | Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers |
title_short | Comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers |
title_sort | comfortable, high-efficiency heat pump with desiccant-coated, water-sorbing heat exchangers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5227918/ https://www.ncbi.nlm.nih.gov/pubmed/28079171 http://dx.doi.org/10.1038/srep40437 |
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