Understanding the drying kinetics within a food dryer is an important step towards its improvement. This study investigates of potato slices in recently proposed waste-heat based convective dryer. Statistical analyses are conducted for ten dissimilar mathematical models to choose best fit model experimental data at various temperatures (70 °C, 60 and 50 °C). Results show that Midilli et al. des...

Geothermal energy is a clean resource, which could significantly contribute to the reduction of greenhouse and other gas emissions by replacing fossil fuels for power generation. In many geothermal sites, resource contains substantial Non-Condensable Gases (NCGs: CO2 contaminants), whose can be limited developing plant schemes suitable complete reinjection. Organic Rankine or closed-loop cycles...

In this study, first-law, second-law, and exergo-economic investigations are accomplished to recover the waste heat of a two-shaft turbofan engine applying supercritical carbon dioxide Brayton cycle. The efficacy different operating parameters including inlet temperature turbine, pressure ratio compressor, Mach number on performance proposed system in terms energy exergy performance, destructio...

This paper aims to present the real improvement opportunities of a simple organic Rankine cycle (ORC) as waste heat recovery system (WHRS) from exhaust gases natural gas engine using toluene working fluid, based on exergy and environmental point view. From energy balances, advanced exergetic analysis was developed determine irreversibilities for improvement. Since traditional exergo-environment...

The declining freshwater resources can be overcome using thermal desalination methods such as solar still. However, the productivity of a still is highly dependent on environment and design. In this study, an improvement passive with partially coated condensation cover thermoelectric cooling system was made. effect varying power (12 W 36 W) investigated compared reference under tropical weather...

District energy systems based on renewable resources help to reduce greenhouse-gas emissions and fossil-fuel use. Here, a multi-generation system combining cooling, heating, power is realized by employing organic Rankine cycle (ORC) absorption heat pump (AHP) technologies, which enable cascading the utilization of solar heat. The AHP can operate steadily providing heating hot water from thermal...

In combined-cycle power plants, a large amount of thermal energy is lost when the boiler and steam unit are out order gas operated in single mode. For first time, this work suggests every plants should be equipped with kind system to recover waste heat by producing hydrogen generating electricity. This combines Rankine cycle thermoelectric generator, finned-tube exchanger, proton exchange membr...

Solar energy has been one of the accessible and affordable renewable technologies for last few decades. Photovoltaics solar thermal collectors are mature to harness energy. However, efficiency photovoltaics decays at increased operating temperatures, suffer from low exergy. Furthermore, along with several financial, structural, technical socio-cultural barriers, limited shadow-free space on bui...