Low temperature cold chain is the top priority of logistics development at this stage. CO2 (carbon dioxide) refrigeration system widely used. However, low efficiency biggest obstacle to its development. In research work, EES (Engineering equation solver) used simulate system, which in thermodynamic modeling and calculation, a novel trans-critical cycle with ejector for low-temperature storage p...

The pressing global challenges, including warming and climate change, the Russia-Ukraine war, Covid-19 pandemic, all are indicative of necessity a transition from fossil-based systems toward bioenergy bioproduct to ensure our plans for sustainable development. Such transition, however, should be thoroughly engineered, considering sustainability different elements these systems. Advanced tools i...

The performance characteristics of an ejector-expansion refrigeration cycle (EEC) using R32 have been investigated in comparison with that using R134a. The coefficient of performance (COP), the exergy destruction, the exergy efficiency and the suction nozzle pressure drop (SNPD) are discussed. The results show that the application of an ejector instead of a throttle valve in R32 cycle decreases...

The main goal of this paper is to analyze the exergy losses during the shock and rarefaction wave of hydrogen-air mixture. First, detonation parameters pressure, temperature, density, and species mass fraction are calculated for three cases where the hydrogen mass fraction in air is 1.5%, 2.5%, and 5%. Then, exergy efficiency is used as objective criteria of performance evaluation. A two-dimens...

The Second Law of thermodynamics is known to be an essential guide for the improvement of energy conversion systems. Throughout the years it has been applied to various engineering methods in particular in methods based on exergy [1] including the 2 Law, thermoeconomics and exergoeconomics. It has also been used in graphically attractive energy integration techniques such as pinch technology an...

Seawater is a complex electrolyte solution of water and salts with sodium chloride as the major constituent. However, the thermodynamic properties of seawater are considerably different from those of aqueous sodium chloride solution. In the literature, exergy analyses of seawater desalination systems have sometimes modeled seawater by sodium chloride solutions of equivalent salt content or sali...

In recent years, the optimal scheduling of multienergy has become focus research. Against this background, paper builds a model flow system cooling, heating, and power, advanced adiabatic compressed air energy storage (AA-CAES) is introduced to smooth wind power generation (WPG) supply heating/cooling energy. Simulated annealing algorithm (SAA) employed energy-saving with “exergy assessment” me...