Performance analysis of the CO 2 heat pump-combined desiccant air-conditioning systems applied to dedicated outdoor air systems

Yaw-Shyan Tsay, Shinsuke Kato, Ryozo Ooka, Makoto Koganei, Kousaku Nishida, Norio Shoda, Koichi Kawamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A desiccant air-conditioning system has been suggested as being suitable to improve indoor air quality due to its superior humidity control. However, this system has the drawback of being less energy efficient, so it is typically used in conjunction with co-generation systems or solar heating systems to improve its energy efficiency. In previous studies, we proposed a new type of desiccant air-conditioning system combined with a CO 2 heat pump, and studied its applicability through experiments and simplified calculations. In this system, the CO 2 heat pump can provide the desiccant air-conditioning system with a steady heat source for both cooling and heating (regeneration). In this paper, the combined system is assumed to be applied to the dedicated outdoor air system of a hotel, and theoretical calculations were carried out to study the system performance. As a result, we propose a system whose overall coefficient of performance is higher than conventional air-conditioning systems.

Original languageEnglish
Title of host publicationIAQVEC 2007 Proceedings - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings
Subtitle of host publicationSustainable Built Environment
Pages93-100
Number of pages8
Publication statusPublished - 2007 Dec 1
Event6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment, IAQVEC 2007 - Sendai, Japan
Duration: 2007 Oct 282007 Oct 31

Publication series

NameIAQVEC 2007 Proceedings - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment
Volume1

Other

Other6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment, IAQVEC 2007
CountryJapan
CitySendai
Period07-10-2807-10-31

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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