skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Performance Assessment of a Desiccant Cooling System in a CHP Application with an IC Engine

Abstract

Performance of a desiccant cooling system was evaluated in the context of combined heat and power (CHP). The baseline system incorporated a desiccant dehumidifier, a heat exchanger, an indirect evaporative cooler, and a direct evaporative cooler. The desiccant unit was regenerated through heat recovery from a gas-fired reciprocating internal combustion engine. The system offered sufficient sensible and latent cooling capacities for a wide range of climatic conditions, while allowing influx of outside air in excess of what is typically required for commercial buildings. Energy and water efficiencies of the desiccant cooling system were also evaluated and compared with those of a conventional system. The results of parametric assessments revealed the importance of using a heat exchanger for concurrent desiccant post cooling and regeneration air preheating. These functions resulted in enhancement of both the cooling performance and the thermal efficiency, which are essential for fuel utilization improvement. Two approaches for mixing of the return air and outside air were examined, and their impact on the system cooling performance and thermal efficiency was demonstrated. The scope of the parametric analyses also encompassed the impact of improving the indirect evaporative cooling effectiveness on the overall cooling system performance.

Authors:
; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15020408
Report Number(s):
NREL/JA-550-36974
TRN: US200518%%306
DOE Contract Number:  
AC36-99-GO10337
Resource Type:
Journal Article
Journal Name:
International Journal of Distributed Energy Resources
Additional Journal Information:
Journal Volume: 1; Journal Issue: 2; Related Information: Posted with permission.
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 33 ADVANCED PROPULSION SYSTEMS; COMMERCIAL BUILDINGS; COOLING SYSTEMS; DESICCANTS; ENGINES; EVAPORATIVE COOLING; HEAT EXCHANGERS; HEAT RECOVERY; HEAT TREATMENTS; INTERNAL COMBUSTION ENGINES; REGENERATION; THERMAL EFFICIENCY; WATER; COMBINED HEAT AND POWER; DISTRIBUTED GENERATION; DESICCANT DEHUMIDIFICATION; ENERGY EFFICIENCY; WATER EFFICIENCY; Buildings

Citation Formats

Jalalzadeh-Azar, A A, Slayzak, S, Judkoff, R, Schaffhauser, T, and DeBlasio, R. Performance Assessment of a Desiccant Cooling System in a CHP Application with an IC Engine. United States: N. p., 2005. Web.
Jalalzadeh-Azar, A A, Slayzak, S, Judkoff, R, Schaffhauser, T, & DeBlasio, R. Performance Assessment of a Desiccant Cooling System in a CHP Application with an IC Engine. United States.
Jalalzadeh-Azar, A A, Slayzak, S, Judkoff, R, Schaffhauser, T, and DeBlasio, R. 2005. "Performance Assessment of a Desiccant Cooling System in a CHP Application with an IC Engine". United States. https://www.osti.gov/servlets/purl/15020408.
@article{osti_15020408,
title = {Performance Assessment of a Desiccant Cooling System in a CHP Application with an IC Engine},
author = {Jalalzadeh-Azar, A A and Slayzak, S and Judkoff, R and Schaffhauser, T and DeBlasio, R},
abstractNote = {Performance of a desiccant cooling system was evaluated in the context of combined heat and power (CHP). The baseline system incorporated a desiccant dehumidifier, a heat exchanger, an indirect evaporative cooler, and a direct evaporative cooler. The desiccant unit was regenerated through heat recovery from a gas-fired reciprocating internal combustion engine. The system offered sufficient sensible and latent cooling capacities for a wide range of climatic conditions, while allowing influx of outside air in excess of what is typically required for commercial buildings. Energy and water efficiencies of the desiccant cooling system were also evaluated and compared with those of a conventional system. The results of parametric assessments revealed the importance of using a heat exchanger for concurrent desiccant post cooling and regeneration air preheating. These functions resulted in enhancement of both the cooling performance and the thermal efficiency, which are essential for fuel utilization improvement. Two approaches for mixing of the return air and outside air were examined, and their impact on the system cooling performance and thermal efficiency was demonstrated. The scope of the parametric analyses also encompassed the impact of improving the indirect evaporative cooling effectiveness on the overall cooling system performance.},
doi = {},
url = {https://www.osti.gov/biblio/15020408}, journal = {International Journal of Distributed Energy Resources},
number = 2,
volume = 1,
place = {United States},
year = {Fri Apr 01 00:00:00 EST 2005},
month = {Fri Apr 01 00:00:00 EST 2005}
}