Experiments on sorption hysteresis of desiccant materials

Technical Report · Wed Aug 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/6481565· OSTI ID:6481565

Pesaran, A; Zangrando, F

Solid desiccant cooling systems take advantage of solar energy for air conditioning. The process involves passing air through a desiccant bed for drying and subsequent evaporative cooling to provide the air conditioning. The desiccant is then regenerated with hot air provided by a gas burner or solar collectors. This performance is limited by the capacity of the desiccant, its sorption properties, and the long-term stability of the desiccant material under cyclic operation conditions. Therefore, we have developed a versatile test facility to measure the sorption properties of candidate solid desiccant materials under dynamic conditions, under different geometrical configurations, and under a broad range of process air stream conditions, characteristic of desiccant dehumidifer operation. We identified a dependence of the sorption processes on air velocity and the test cell aspect ratio and the dynamic hysteresis between adsorption and desorption processes. These experiments were geared to provide data on the dynamic performance of silica gel in a parallel-passage configuration to prepare for tests with a rotary dehumidifier that will be conducted at SERI in late FY 1984. We also recommend improving the accuracy of the isotopic perturbation technique.

• Research Organization: Solar Energy Research Inst., Golden, CO (USA)
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 6481565
• Report Number(s): SERI/TR-252-2382; ON: DE84013037
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
AIR CONDITIONERS
DEHUMIDIFICATION
DEHUMIDIFIERS
DESICCANTS
EQUIPMENT
GAS CHROMATOGRAPHY
REGENERATION
SILICA GEL
SOLAR AIR CONDITIONERS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES