Abstract
In this study, the Solar Energy Assisted Heat Pump (SAHP) system is modeled by creating different processes with the help of various models created in the JAVA program. The SAHP model was created in order to obtain hot water by utilizing solar energy. The inlet water temperature in the system was taken as 10 °C in December and 20.5 °C in June and the SAHP model was analyzed by numerical method. In the evaporator model, considering the coordinates of the city of Izmir, various graphs were created by calculating the different spectral solar energy values falling on 1 m2 evaporator plate on certain days of 2019. In the graphics, the highest energy density on 1 m2 evaporator plate for İzmir province was 852.095 W/m2 on 21 June at 12:00, and the lowest energy density was 455.143 W/m2 on 21 December at 12:00. In the SAHP system, the evaporator plate area was determined as 2.40 m2 and the compressor power was 0.56kW, and a condenser model was created. The required condenser surface areas were found by calculating the thermal energies given by the condenser for different dates in the system. In the modeling of the heat pump, the Coefficient of Performance (COP) of the SAHP system for R134a and R404A was obtained by taking the date of June 21, 12:00, when the spectral energy is most intense, as a reference.
Highlights
Harmful effects of burning fossil fuels on the global climate occur day by day
Solar-assisted evaporator plate modeling was made instead of the fan evaporator which is used as an evaporator in air-assisted heat pump systems
Solar assisted heat pump modelling evaporator surface with the integration values of the cubic strip algorithm of spectral data; For the date of 21 December 2019, the amount of energy falling on the evaporator plate was 455.143 W/m2, the energy absorbed in the plate was 388.508 W/m2 and the radiation emitted from the plate was obtained as 60.307 W/m2
Summary
Harmful effects of burning fossil fuels on the global climate occur day by day. Some institutions have aware of this situation increase environmental protection laws in the world. The European continent aims to be the first climate-neutral continent in the world in 2050, especially with the European green agreement signed by the European Union member states. For this important goal, the European Commission has committed to amending existing environmental legislation, which will reduce the emission rate on the continent by 55% by 2030 [1]. Characteristics of solar energy are intermittence and low density so solar heating has largely been restricted. The solar-assisted heat pump (SAHP) system could be solving the intermittence and low-density solar energy problem. The solar boosted evaporator plate model was aimed to increase the energy efficiency of the heat pump system. İn the JAVA program with SAHP model in the heat pump cycle by doing, it has been made an effort to optimize all systems parameters separately
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