International Journal of Sustainable and Green Energy

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R-290 Vapor Compression Heat Pump for Recovering and Upgrading Waste Heat of Air-Conditioner by Using Spiral Coil Tank

Received: 29 October 2014    Accepted: 31 October 2014    Published: 12 January 2015
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Abstract

In this study, a concept of using a vapor compression heat pump for recovering and upgrading waste heat of an air-conditioner has been presented. R-290 has been selected due to its high efficiency and the environmental impact. R-290 heat pump at heating capacity 3 kW has been constructed to recover waste heat from the discharge refrigerant leaving compressor of R-134a air-conditioner at cooling capacity 1 TR. From the study results, it could be seen that the modified unit gives better EERAC when the cooling water does not over 43 ºC. A set of simplified model has been developed to predict the system performance and the simulated results agree quite well with the measured data. Moreover, profile of hot water consumption in the department of children's hospital room, Maharaj Nakorn Chiang Mai Hospital is chosen to study. It was found that the hospital requires hot water is 0.815 m3/d at 50 ºC temperature, one unit of R-290 heat pump is enough to generate hot water with the economic results of saving cost and payback period around 765.46 USD/y and 1.97 y, respectively.

DOI 10.11648/j.ijrse.s.2015040101.18
Published in International Journal of Sustainable and Green Energy (Volume 4, Issue 1-1, January 2015)

This article belongs to the Special Issue Renewable Energy Applications in the Agricultural Field and Natural Resource Technology

Page(s) 50-56
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Air-Conditioner, Vapor Compression Heat Pump, Performance Curve, Heat Recovery, Spiral Coil Tank

References
[1] N. Chaiyat, C. Chaichana, “Working fluid selection for geothermal heat pump”, Engineering Journal Chiang Mai University, 2006, 13: 27–32.
[2] N. Chaiyat, T. Kiatsiriroat, “Recovering and upgrading waste heat of air-conditioner by combining R-123 vapor compression heat pump,” In: Proceeding of the 9th Conference on Energy Heat and Mass Transfer in Thermal Equipment, Prachuap Khiri Khan, Thailand, March 11–12, 2010.
[3] F. S. Singharajwarapan, N. Chaiyat, “Vapor compression heat pump using low temperature geothermal water: A case study of northern Thailand”, In: Proceeding of the 10th Asian Geothermal Symposium, Tagaytay, Philippines, September 22–24, 2013.
[4] V. R. Pendyala, S. Devotta, V. S. Patwardhan, “Heat pump assisted dryer Part 2: Experimental study”, International Journal of Energy Research, 1990, 14: 493–507.
[5] S. K. Chou, M. N. A. Hawlader, J. C. Ho, N. E. Wijeysundera, and S. Rajasekar, “Heat pump in the drying food products”, The Science and Technology Information Network of the Philippines, 1994, 8: 1–4.
[6] S. Clements S, S. Jia, P. Jolly, “Experimental verification of a heat pump assisted continuous dryer simulation model”, International Journal of Energy Research, 1993, 17: 19–28.
[7] G. S. Young, S. Birchall, R. L. Mason, “Heat pump drying of food products prediction of performance and energy efficiency”, In: Proceeding of the 4th ASEAN Conference on Energy Technology, Bangkok, Thailand, October17–20, 1995.
[8] A. Sadchang, “Design and construction of heat pump dryer prototype for small industry,” Master Engineering Dissertation, Chiang Mai University, Chiang Mai, Thailand, 2006.
[9] M. Burapha, T. Kiatsiriroat, “Simplified model of solar water heating with heat pump assisted”, The journal of industrial technology, 2008, 2: 15–23.
[10] American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc, “ASHRAE Handbook fundamentals,” Refrigerant, American, 2009.
[11] Properties of R-32, [Accessed 1 June 2014].
[12] Properties of R-410a, [Accessed 1 June 2014].
[13] Exchange rate, [Accessed 1 June 2014].
Author Information
  • School of Renewable Energy, Maejo University, Chiang Mai, Thailand

  • School of Renewable Energy, Maejo University, Chiang Mai, Thailand

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    Nattaporn Chaiyat, Natthawud Dussadee. (2015). R-290 Vapor Compression Heat Pump for Recovering and Upgrading Waste Heat of Air-Conditioner by Using Spiral Coil Tank. International Journal of Sustainable and Green Energy, 4(1-1), 50-56. https://doi.org/10.11648/j.ijrse.s.2015040101.18

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    ACS Style

    Nattaporn Chaiyat; Natthawud Dussadee. R-290 Vapor Compression Heat Pump for Recovering and Upgrading Waste Heat of Air-Conditioner by Using Spiral Coil Tank. Int. J. Sustain. Green Energy 2015, 4(1-1), 50-56. doi: 10.11648/j.ijrse.s.2015040101.18

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    AMA Style

    Nattaporn Chaiyat, Natthawud Dussadee. R-290 Vapor Compression Heat Pump for Recovering and Upgrading Waste Heat of Air-Conditioner by Using Spiral Coil Tank. Int J Sustain Green Energy. 2015;4(1-1):50-56. doi: 10.11648/j.ijrse.s.2015040101.18

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  • @article{10.11648/j.ijrse.s.2015040101.18,
      author = {Nattaporn Chaiyat and Natthawud Dussadee},
      title = {R-290 Vapor Compression Heat Pump for Recovering and Upgrading Waste Heat of Air-Conditioner by Using Spiral Coil Tank},
      journal = {International Journal of Sustainable and Green Energy},
      volume = {4},
      number = {1-1},
      pages = {50-56},
      doi = {10.11648/j.ijrse.s.2015040101.18},
      url = {https://doi.org/10.11648/j.ijrse.s.2015040101.18},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ijrse.s.2015040101.18},
      abstract = {In this study, a concept of using a vapor compression heat pump for recovering and upgrading waste heat of an air-conditioner has been presented. R-290 has been selected due to its high efficiency and the environmental impact. R-290 heat pump at heating capacity 3 kW has been constructed to recover waste heat from the discharge refrigerant leaving compressor of R-134a air-conditioner at cooling capacity 1 TR. From the study results, it could be seen that the modified unit gives better EERAC when the cooling water does not over 43 ºC. A set of simplified model has been developed to predict the system performance and the simulated results agree quite well with the measured data. Moreover, profile of hot water consumption in the department of children's hospital room, Maharaj Nakorn Chiang Mai Hospital is chosen to study. It was found that the hospital requires hot water is 0.815 m3/d at 50 ºC temperature, one unit of R-290 heat pump is enough to generate hot water with the economic results of saving cost and payback period around 765.46 USD/y and 1.97 y, respectively.},
     year = {2015}
    }
    

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  • TY  - JOUR
    T1  - R-290 Vapor Compression Heat Pump for Recovering and Upgrading Waste Heat of Air-Conditioner by Using Spiral Coil Tank
    AU  - Nattaporn Chaiyat
    AU  - Natthawud Dussadee
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    DO  - 10.11648/j.ijrse.s.2015040101.18
    T2  - International Journal of Sustainable and Green Energy
    JF  - International Journal of Sustainable and Green Energy
    JO  - International Journal of Sustainable and Green Energy
    SP  - 50
    EP  - 56
    PB  - Science Publishing Group
    SN  - 2575-1549
    UR  - https://doi.org/10.11648/j.ijrse.s.2015040101.18
    AB  - In this study, a concept of using a vapor compression heat pump for recovering and upgrading waste heat of an air-conditioner has been presented. R-290 has been selected due to its high efficiency and the environmental impact. R-290 heat pump at heating capacity 3 kW has been constructed to recover waste heat from the discharge refrigerant leaving compressor of R-134a air-conditioner at cooling capacity 1 TR. From the study results, it could be seen that the modified unit gives better EERAC when the cooling water does not over 43 ºC. A set of simplified model has been developed to predict the system performance and the simulated results agree quite well with the measured data. Moreover, profile of hot water consumption in the department of children's hospital room, Maharaj Nakorn Chiang Mai Hospital is chosen to study. It was found that the hospital requires hot water is 0.815 m3/d at 50 ºC temperature, one unit of R-290 heat pump is enough to generate hot water with the economic results of saving cost and payback period around 765.46 USD/y and 1.97 y, respectively.
    VL  - 4
    IS  - 1-1
    ER  - 

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