Radiative cooling, a unique and uncommon passive cooling method for devices operating outdoors, has recently been demonstrated to be effective for photovoltaic thermal management. In this work, we investigate the effect of radiative cooling as a complement to existing passive cooling methods like convective cooling in a related system with much higher heat loads: a high-concentration photovolta...

This paper presents a design of solar tracking system driven by 12V or 24V DC motor controlled by a microchip ‘Intelligent Drive unit IBL2403’[1]. The proposed double axis rotation solar tracker ensures the optimization of conversion of solar energy to electrical energy by orientation of ‘titanium-oxide’ PV panels’ [2-6] in accordance to the hemispherical position of the Sun. The hemispheroidal...

The purpose of this study is to numerically investigate the performance a solar physical surface absorption cooling system, in which activated carbon/methanol used as working pair, placed inside parabolic-shaped collector. governing mathematical model issue based on equations conservation mass, energy, and thermodynamics process. are discretized using fully implicit finite difference method, Fo...

The past and future evolution of atmospheric composition and climate has been simulated with a version of the Max Planck Institute Earth System Model (MPI-ESM). The system consists of the atmosphere, including a detailed representation of tropospheric aerosols, the land surface, and the ocean, including a model of the marine biogeochemistry which interacts with the atmosphere via the dust and s...

load management and cost optimization are among the important factors in trigenerationsystems and combined cooling, heating and power (cchp) systems. in this study, an innovative cchpsystem uses a gas turbine as the prime mover and has a heat recovery steam generator (hrsg) in addition toan auxiliary boiler, electric and absorption chillers. the system is tied with the bulk electric grid; to ex...

The low conversion efficiency of solar cells produces large amounts of thermal energy to the cells, and with an increase in the temperature of solar cells, their electrical efficiency decreases. Therefore, a hybrid photovoltaic thermal system improves the overall efficiency of the system by adding thermal equipment to the solar cell and removing excessive heat from these cells. In this paper, w...