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Impact of district heat source on primary energy savings of a desiccant-enhanced evaporative cooling system

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  • Dong, Hye-Won
  • Lee, Sung-Joon
  • Yoon, Dong-Seob
  • Park, Joon-Young
  • Jeong, Jae-Weon

Abstract

The purpose of this research is to evaluate the primary energy savings of a desiccant-enhanced evaporative (DEVap) cooling system with a district heat source. The DEVap system consists of an internally cooled liquid desiccant dehumidifier and dew point evaporative cooler connected in series. The liquid desiccant unit requires a heat source for regenerating the weak desiccant solution, which means that the DEVap cooler is a thermally driven cooling system. It can provide energy benefits when the supplied heat comes from waste heat or renewable heat sources. In this research, district heat obtained from a combined heat and power (CHP) system was used as the heat source for the DEVap system. The primary energy consumption and CO2 emission rate of the proposed system with a district heat source were estimated using a detailed energy simulation and compared with those powered by a conventional gas boiler. The results showed that the DEVap system with district heat source consumed 46.2% less primary energy and produced 40.5% less CO2 compared with the system using the conventional gas boiler.

Suggested Citation

  • Dong, Hye-Won & Lee, Sung-Joon & Yoon, Dong-Seob & Park, Joon-Young & Jeong, Jae-Weon, 2017. "Impact of district heat source on primary energy savings of a desiccant-enhanced evaporative cooling system," Energy, Elsevier, vol. 123(C), pages 432-444.
    • Handle: RePEc:eee:energy:v:123:y:2017:i:c:p:432-444
    DOI: 10.1016/j.energy.2017.02.005
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    Cited by:

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    2. Giampieri, Alessandro & Ma, Zhiwei & Smallbone, Andrew & Roskilly, Anthony Paul, 2018. "Thermodynamics and economics of liquid desiccants for heating, ventilation and air-conditioning – An overview," Applied Energy, Elsevier, vol. 220(C), pages 455-479.
    3. Kim, Min-Hwi & Kim, Deukwon & Heo, Jaehyeok & Lee, Dong-Won, 2020. "Energy performance investigation of net plus energy town: Energy balance of the Jincheon Eco-Friendly energy town," Renewable Energy, Elsevier, vol. 147(P1), pages 1784-1800.
    4. Saedpanah, Ehsan & Pasdarshahri, Hadi, 2021. "Performance assessment of hybrid desiccant air conditioning systems: A dynamic approach towards achieving optimum 3E solution across the lifespan," Energy, Elsevier, vol. 234(C).
    5. Beom-Jun Kim & Junseok Park & Jae-Weon Jeong, 2019. "Indoor Air Quality Enhancement Performance of Liquid Desiccant and Evaporative Cooling-Assisted Air Conditioning Systems," Sustainability, MDPI, vol. 11(4), pages 1-16, February.
    6. Yu-Jin Hwang & Jae-Weon Jeong, 2021. "Energy Saving Potential of Radiant Floor Heating Assisted by an Air Source Heat Pump in Residential Buildings," Energies, MDPI, vol. 14(5), pages 1-14, March.
    7. Kim, Min-Hwi & Kim, Deukwon & Heo, Jaehyeok & Lee, Dong-Won, 2019. "Techno-economic analysis of hybrid renewable energy system with solar district heating for net zero energy community," Energy, Elsevier, vol. 187(C).
    8. Dong, Hye-Won & Jeong, Jae-Weon, 2020. "Energy benefits of organic Rankine cycle in a liquid desiccant and evaporative cooling-assisted air conditioning system," Renewable Energy, Elsevier, vol. 147(P1), pages 2358-2373.

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