نتایج جستجو برای: heat system

تعداد نتایج: 2401225  

Journal: :iranian journal of numerical analysis and optimization 0
qodsiyeh ‎jannati ali zakeri

in this paper, we investigate the application of the homotopy perturbation method (hpm) for solving a one-dimensional nonlinear inverse heat conduction problem. in this problem the thermal conductivity term is a linear function with respect to unknown heat temperature in bounded interval. furthermore, the temperature histories are unknown at the end point of the interval. this problem is ill-po...

In this article, the sliding mode control of frequency load control of power systems is studied. The study areaconsists of a system of water and heat. First, a mathematical model of the proposed system disturbances ismade and then sliding control mode for frequency load control is provided. By the system simulation andsliding mode control, it can be shown that the damping of oscillations is wel...

In this paper, the performance of an ejector cooling system and the effect of the following different working fluids such as water, ammonia, R134a, R141b, R12, R600 and R245fa are described and the effects of cycle parameters on the consumed heat and work and COP are studied. This cycle with the working fluid R141b has the least COP while the working fluid R₁₂ in comparison with the other worki...

2014
Ian Bell Vincent Lemort Ian BELL Vincent LEMORT

In recent years the heat fluxes that must be removed from terrestrial electrical systems have been steadily increasing. The same increase in electrical component heat flux can also be seen in satellite and aerospace applications. As a result, it has proven necessary to develop heat pump systems that can operate in low-gravity environments with high reliability and efficiency to cool electrical ...

Air quality inside the residential buildings has become a major challenge due to the climatic change and increasing the living standards. The increased cooling demand results a peak in electrical power consumption during the hottest summer hours. Phase Change Materials (PCMs) used in Thermal Energy Storage (TES) systems, can be a proper solution to control the room temperature and maintain the ...

Journal: :Power engineering: research, equipment, technology 2020

Journal: :Bulletin of the National Technical University «KhPI» Series: New solutions in modern technologies 2018

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