Analytical and experimental study of a liquid desiccant heat and mass exchanger operating near water freezing temperature

摘要: With the rising costs of electricity due to increasing demand electric power,liquid desiccant systems have received significant attention as a way reducelatent loads on air conditioning systems. In particular, performance liquiddesiccant in humid climates has shown reductions energyconsumption. general, these liquid are composed by anabsorber or dehumidifier and regenerator that utilizes heat source rejectthe water from diluted desiccant. As humidity is absorbedat dehumidifier, temperature increases theaddition enthalpy condensation vapor. Thus,many designs absorbers include flow cooling fluid thatremoves lowering its temperature.A different application corresponds localizedremoval moisture inside low rooms contain relativelyhigh levels such refrigerated warehouses for food industry.The purpose reduce formation ice at surface evaporator.Due rooms, no necessaryfor removal Thus, theabsorbers differ used more conventional applications.In this thesis, mathematical models mass transfer an adiabaticparallel-plate absorber which thin film flows downits walls dehumidifies cross-flow configuration developed. Numericalresults obtained function ofseveral parameters including inlet relative humidity, temperature, rates desiccant, concentration analyzed. The results compared with experimentaldata available using calcium chloride Thegeometry optimized improve dehumidifying performanceof core.