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Design and Testing of a Separate Sensible and Latent Cooling Packaged Terminal Air Conditioning Unit

[+] Author Affiliations
Abdullah Alabdulkarem

King Saud University, Riyadh, Saudi Arabia

Michael Cristiano, Yunho Hwang, Reinhard Radermacher

University of Maryland, College Park, MD

Paper No. ES2015-49065, pp. V001T01A001; 7 pages
  • ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum
  • Volume 1: Advances in Solar Buildings and Conservation; Climate Control and the Environment; Alternate Fuels and Infrastructure; ARPA-E; Combined Energy Cycles, CHP, CCHP, and Smart Grids; Concentrating Solar Power; Economic, Environmental, and Policy Aspects of Alternate Energy; Geothermal Energy, Harvesting, Ocean Energy and Other Emerging Technologies; Hydrogen Energy Technologies; Low/Zero Emission Power Plants and Carbon Sequestration; Micro and Nano Technology Applications and Materials
  • San Diego, California, USA, June 28–July 2, 2015
  • Conference Sponsors: Advanced Energy Systems Division, Solar Energy Division
  • ISBN: 978-0-7918-5684-0
  • Copyright © 2015 by ASME


Packaged terminal air conditioning (PTAC) systems are typically utilized for space heating and cooling in hotels and apartment buildings. However, they cool the air to low temperature for dehumidification and some reheating may be required to resolve overcooling. A prototype of a solid desiccant wheel assisted separate sensible and latent cooling (SSLC) PTAC system was designed and constructed, which has a cooling capacity of 3.5 kW. The heat exchangers and vapor compression cycle were modeled in in-house software, CoilDesigner and VapCyc. The modeling results show improvement in the coefficient of performance from 3.12 to 4.05 or 30%. Cost study was conducted to evaluate the economics of SSLC PTAC units within the U.S. climate conditions. The study shows the payback period for the national average could be as low as 2 years. The system was experimentally tested and its performance was not as expected due to some design challenges. This paper highlights the lessons learned from the modeling and experimental work and discusses the economic analysis in addition to future design improvements and system optimization.

Copyright © 2015 by ASME



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