Impact of desiccant degradation on desiccant cooling system performance

Conference · Sat Sep 01 04:00:00 EDT 1990

OSTI ID:6489190

Pesaran, A A; Penney, T R

The performance of open-cycle desiccant cooling systems depends on several factors, some of which can change beyond manufacturers' specifications. For example, the desiccant sorption process may degrade with time on exposure to airborne contaminants and thermal cycling. Desiccant degradation can reduce the performance of a dehumidifier and thus the performance of desiccant cooling systems. Using computer simulations and recent experimental data on silica gel, the impact of degradation was evaluated. Hypothetical degradations of desiccants with Type 1 moderate isotherms were also simulated. Depending on the degree and type of desiccant degradation, the decrease in thermal coefficient of performance (COP) and cooling capacity of the system was 10% to 35%. The 35% loss in system performance occurs when desiccant degradation is considered worst case. The simulations showed that the COP, and to a lesser degree the cooling capacity of these degraded systems, could be improved by increasing the rotational speed of the dehumidifier. It is shown that easy engineering solutions might be available for some types of degradations. 9 refs., 6 figs., 1 tab.

• Research Organization: Solar Energy Research Inst., Golden, CO (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 6489190
• Report Number(s): SERI/TP-254-3888; CONF-910127--3; ON: DE90000390
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
ADSORPTION
AEROSOLS
AIR CONDITIONING
CHALCOGENIDES
COEFFICIENT OF PERFORMANCE
COLLOIDS
COOLING SYSTEMS
DEHUMIDIFICATION
DESICCANTS
DISPERSIONS
ENERGY SYSTEMS
GELS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RESIDUES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SMOKES
SOLS
SORPTION