The ventilatory apparatus is analogous to a mechanical system composed of an engine coupled to a pump. The engine comprises the chest wall and the diaphragm, while the pump embraces the airways and the lungs. Although the two units operate as a single assembly, their functions are distinct. The engine converts metabolic energy into mechanical work; the pump translates this work into a rhythmic ...

Heat pumps offer economical alternatives of recovering heat from different sources for use in various industrial, commercial and residential applications. In this study, singlestage air-source vapor compression heat pump system has been optimized using a genetic algorithm (GA) and fuzzy logic (FL). The necessary thermodynamic properties for optimization were calculated by FL. Thermodynamic prop...

This paper presents a mathematical model of heat pump exchangers and their thermal interaction with fan for an air dryer. The calculation algorithm developed the finned is based on ε-NTU method, allowing determination side refrigerant transfer coefficients, evaporator condenser capacity parameters at dehumidifier outlet known exchanger geometries, initial mass flow rate. was verified industrial...

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A new mechanical supercharger-a low compression ratio scroll compressor was introduced in this paper, including the principle, scroll geometry, suction volume, inner compression ratio, etc. Then the advantages of the scroll supercharger were pointed out compared with other superchargers. After some concrete design considerations, a prototype was made and the performance tests showed the results...

background: the incomplete burning of fuel in engine of vehicles, evaporation of petrol from gas stations, and also car carburetor cause unburned hydrocarbons to be emitted in ambient air of cities and gas station locations. from unburned hydrocarbons; monocyclic aromatic hydrocarbon influence to citizen's health and benzene is known as carcinogenic compounds. the objectives of this study are t...