... ˙ + ∑ W ˙ + ∑ ( m ˙ h ) = 0 Conservation of species: (12) ∑ x m ˙ = 0 Conservation of mass: (11) ∑ m ˙ = 0 The mathematical model is based on the mass, species, and energy conservation equations listed as follows: The exergy of any...

... or multigeneration systems. Employing the subsystems forming any multigeneration system as a reference, the relative saving ratios of energy and exergy are calculated. These saving ratios are used as metrics for the goodness of multigeneration systems. We will also use them to calculate equivalent energetic...

... thermal and exergy efficiency of an air heater was found to be 70.2 and 4.4%, respectively. The average overall thermal efficiency of carbon nanotubes + copper oxide-paraffin wax energy storage unit was 31.19%, with 11.9% as the average overall exergy efficiency. The energy storage increases the drying...

...) and parallel (m) combinations for a given number of N (=n × m) collectors for maximum overall exergy depending on thermal and electrical energies which have not been considered yet so far. Further, a new expression has also been developed for the heat removal factor and instantaneous thermal efficiency...

... 04 10 2022 20 10 2022 curved solar air heater SST k–ω model entropy generation energy exergy heat transfer simulation solar solar receiver The most abundant non-conventional energy source available in the environment is solar energy. This energy reaches the Earth...

... = enviroeconomic cost, $/annum CO 2 E = average CO 2 emission CO 2 MN = CO 2 annual emissions reductions, tonnes E out = annual energy output, kWh/year E in = embodied energy, kWh E x b , o u t = output exergy E x b , i n...

... collectors in series, respectively. The maximum energy for the single collector is 4.12 kW and 4 kW, while for two collectors connected in series, the maximum energy is 7.08 kW and 6.69 kW. Average thermal efficiency is 4.45% and 4.51% and average exergy efficiency is 9.66% and 15.17% for single and series...

... the design conditions, the effects of split ratio on the net power, the thermal efficiency, and the exergy loss of the combined cycle are studied. The variation of thermal efficiency of each part of the system with split ratio under different turbine inlet pressures and temperatures is further analyzed...

... produced by turbine, refrigeration load, exergy of refrigeration, and efficiencies of trigeneration system. An increase in the concentration of the ammonia–water basic solution is leading toward the significant increase in the turbine power and the elevation of trigeneration system’s energy and exergy...

... are calculated to be 21.03%, 20.42%, and 22.47%, respectively. Overall energy and exergy efficiency values are found to be 13.39% and 14.37%; 11.90% and 13.74%; 12.13% and 13.64% for the solar thermal power plants using PTC, LFR, and ST technologies, respectively. In conclusion, it is seen that LFR technology...

... exergy. This work presents an attempt to determine the amount of exergy generated by an optimally inclined double-storied BIPV thermal system by considering the actual cyclic nature of insolation, surrounding air temperature, PV cell temperature, intermediate slab temperature, and the chamber temperature...

.... The simulation result demonstrates that the hybrid GOA-SA algorithm turned out to be an exceptionally effective method for optimal tuning of the parameters of the PVT-TE system. The result explicitly shows that the average value of overall electrical efficiency and exergy gain are 15.27% and 27.0565 W...

... MOORA renewable energy exergy heat transfer energy storage With the rapid rise in the energy crisis and the alarming pollution levels, it is inevitable to quickly develop efficient energy extraction methods from renewable energy sources. Solar energy has enormous potential, and energy...

... to the Rankine cycles. The objective of the study is to develop an MGS without a gas cycle that can achieve higher energy and exergy efficiencies. Two concentrated solar technologies, namely, parabolic trough collectors (PTCs) and heliostats are used to power the designed system. The environmental benefit...

... and exergy efficiency at various operating conditions of the proposed trigeneration system. The computed results are authenticated with the reported literature. A comparison is made between the present findings and reported results in the form of exergy efficiency, total exergy destroyed, and energy...

...) Q ˙ e x e , i n = exergy heat input of the thermal storage system (kW) Q ˙ e x e , o u t = exergy heat output of the thermal storage system (kW) c pa = specific heat of air (kJ/(kg °C)) c pw = specific heat of water (kJ/(kg °C...

... study cooling efficiency exergy photovoltaics Energy consumption is increasing day by day due to population growth and advancing technology [ 1 ]. Renewable energy sources are at the forefront in order to meet this increase. Photovoltaic systems are developing in parallel with material...

... ]. Based on the lumped capacitance method, the heat transfer coefficient at the inner wall of the tank was calculated as follows: (9) h i = ( λ f d s ) ( 2.58 Re 1 / 3 + 0.094 Re 0.8 Pr 0.4 ) Fig. 14 Exergy destruction due...

... ngineering : I ncluding W ind E nergy and B uilding E nergy C onservation . 20 12 2018 06 08 2019 13 08 2019 03 09 2019 BIPV CFD ventilation cooling PV performance temperature design environmental conditions building exergy heat transfer photovoltaics renewable...

... convective heat transfer between the absorber and the air medium. In this present study, it is aimed to increase the convective heat transfer by modifying the absorber and the type of air flow inside the duct. Experimental studies were performed to study about the energy and exergy efficiencies of SAH...