Simulation results show that the obtained SPBs, the primary energy saving for electricity and domestic hot water production, and the equivalent carbon dioxide avoided emissions range between 10.6 to 11.3 years, 58.5 to 68.8% and 76.3 to 90.2%, respectively. They refer to a 3-floor office building located in four different Italian weather zones. In order to show the potentiality of the developed simulation model, several new case studies are developed. For energy, economic and environmental impact optimization purposes, sensitivity analyses can be performed by varying the main system design parameters with respect to the value of reference case ones. traditional reference building-plant systems. Includes a suitable tool for the comparison of the innovative system layout vs. In particular, both the passive and active energy effects of the investigated collectors can be assessed. By means of the developed dynamic simulation model (implemented in TRNSYS environment) the energy system performance on the whole building can be analysed in terms of heating /cooling energy, electricity and domestic hot water demands. The eventual extra-production is delivered to the grid or stored in lead-acid batteries. The electricity produced by building integrated photovoltaic thermal collectors is used to satisfy the building needs. Auxiliary electric air-to-water heat pumps/chillers and a gas-fired condensation boiler are included in the system model in order to integrate the demands of heating, cooling and domestic hot water production. The thermal energy of building integrated photovoltaic thermal collectors is exploited in order to produce solar space heating and cooling and domestic hot water. This work focuses on a dynamic simulation model for the energy, economic and environmental analysis of an innovative polygenerative system layout based on a building integrated photovoltaic thermal system coupled to an adsorption chiller and to an electricity storage system.
A significant increase in efficiency was observed by using a water storage tank and pre heating the feed water favorably influenced the output. Collector area and inlet water flow rate also had a considerable impact on productivity. The simulations for a water heated cycle revealed that the output water temperature be reliant strongly on the incident solar radiations and inlet water temperature. A flat plate solar collector, humidifier and dehumidifier are to be integrated in an open air open water configuration.
The weather file used was in standard TMY 2 format for Asian data. The system consists of isolated components for heating, evaporation and condensation, in order to lower the thermal losses. Considering the intense need for the development of alternate technologies for energy deficient and impoverished countries of the world like Pakistan, this model is in particular anticipated for underprivileged communities where pure and uncontaminated drinking water as well as modern technologies are not accessible. The overall broad purpose of this paper is to develop and evaluate a small scale solar humidification dehumidification water desalination system using a graphical tool TRNSYS and assess its thermal behavior.
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