Desiccant contamination in desiccant cooling systems
This paper presents the results of a desiccant contamination experiment and the impact of the obtained silica gel degradation data on the performance of a desiccant cooling system. A test apparatus was used to thermally cycle several desiccant samples and expose them to ambient'' humid air or contaminated'' humid air. The source of contamination was cigarette smoke. The exposed desiccant samples were removed after 0.5, 1, 2, or 4 months of exposure and their moisture capacities were measured. The silica get samples thermally cycled with ambient air showed a 5% to 30% to 70% of their moisture capacity. Using the obtained degradation data in a system, the impact of desiccant degradation on the performance of a desiccant cooling cycle was estimated. Depending on the degree of desiccant degradation, the decrease in thermal coefficient of performance (COP) and cooling capacity of the system was 10% to 35%. It was found that the COP and the cooling capacity of a system after desiccant degradation can be improved by increasing the rotational speed of the dehumidifier. This indicates that a simple engineering solution may exist to alleviate some type of degradations. 9 refs., 6 figs., 2 tabs.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA)
- Sponsoring Organization:
- DOE/CE
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 6797115
- Report Number(s):
- SERI/TP-254-3800; CONF-901109-20; ON: DE90000349
- Resource Relation:
- Conference: International symposium on gas-liquid two-phase flows in conjunction with the winter annual meeting of the American Society of Mechanical Engineers, Dallas, TX (USA), 25-30 Nov 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
COOLING SYSTEMS
COEFFICIENT OF PERFORMANCE
DESICCANTS
CONTAMINATION
DEHUMIDIFICATION
HEAT EXCHANGERS
HEAT TRANSFER
MOISTURE
SILICA
SMOKES
AEROSOLS
CHALCOGENIDES
COLLOIDS
DISPERSIONS
ENERGY SYSTEMS
ENERGY TRANSFER
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RESIDUES
SILICON COMPOUNDS
SILICON OXIDES
SOLS
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)
320303 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes
140901 - Solar Thermal Utilization- Space Heating & Cooling