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Computer simulation of ground-coupled liquid desiccant air conditioner for sub-tropical regions.

Author(s) : LEE C. K., LAM H. N.

Type of article: Article

Summary

A computer model for a novel ground-coupled liquid desiccant air conditioner (GCLDAC) was developed in which a liquid desiccant cycle selectively operated in parallel with a conventional ground-source heat pump cycle by employing just a single compressor. Reverse cycle operation was incorporated to provide heating in winter. Dynamic simulation was carried out for a single-zone sample building at two occupancy levels based on the weather data for Hong Kong and compared with those obtained using a conventional ground-source heat pump system (GSHP). It was found that the borehole length for GCLDAC was reduced by 10.1% on average under different groundwater velocities at a low occupancy level corresponding to a fresh air ratio of 0.066. A larger average reduction of 14.3% could be reached for a higher occupancy level corresponding to a fresh air ratio of 0.122. The energy consumptions for both systems were very close even when the additional parasitic energy consumption for GCLDAC was accounted for. A simple economic analysis indicated that if the borehole installation cost exceeded USD35.0/m, cost saving could be found for the new system at both occupancy levels. Should GCLDAC be manufactured in a low-cost region like China, the economic benefit could be furthered enhanced. [Reprinted with permission from Elsevier. Copyright, 2009].

Details

  • Original title: Computer simulation of ground-coupled liquid desiccant air conditioner for sub-tropical regions.
  • Record ID : 2011-0334
  • Languages: English
  • Source: International Journal of thermal Sciences - vol. 48 - n. 12
  • Publication date: 2009/12
  • DOI: http://dx.doi.org/10.1016/j.ijthermalsci.2009.05.010

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