Abstract
This study presents a novel set-up for desiccant-based cooling and dehumidification systems. In this cycle, a solid desiccant and conventional combined cooling and power (CCP) systems, based on the ejector refrigeration cycle (ERC) and the organic Rankine cycle (ORC), are integrated to provide dehumidification and cooling, simultaneously. The ERC is integrated with the ORC for devising a self-powered design which has not been done until now. The proposed integrated system is useful for replacing the peak electricity demand with the heat demand, decreasing the pressure on the power grid in humid areas. Dynamic hourly simulation of the proposed system as well as a conventional system were performed to show the energy saving potential of the proposed system.
Highlights
Air conditioning systems contribute to over 60% of the total energy consumption in buildings [1, 2] and the biggest share of building carbon emissions
This study presents a novel set-up for desiccant-based cooling and dehumidification systems
It shows that the proposed system is able to provide low enough temperatures, so that, in real conditions, by implementing a proper control system to turn off the system, it would provide comfort conditions
Summary
Air conditioning systems contribute to over 60% of the total energy consumption in buildings [1, 2] and the biggest share of building carbon emissions. Vapor compression systems are usually used in humid climates for cooling air and dehumidification, resulting in extremely high electricity consumption during hot summer days. The Bushehr province in Iran, with its hot and humid climate, has the highest per capita electricity consumption in the country, with 80% of this electricity consumption due to vapor compression cooling systems [3]. The earliest desiccant-based cooling system (DCS) was presented by Pennington [4]. Many researchers have developed new configurations for desiccant-based cooling and dehumidification systems. La et al [5] presented theoretical and experimental studies of a solar driven two-stage rotary desiccant cooling system coupled with a vapor compression air-conditioning system.
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