نتایج جستجو برای: cooling need

تعداد نتایج: 588719  

2015
Dong-Seok Lee Sung-Han Koo Byung-Yun Lee Marc A. Rosen

The energy performance of buildings depends on how effectively the building envelope responds to climate. Architects, therefore, need to design building envelopes with the consideration of local climate characteristics in the early design stage. Simplified formulas were used that evaluate the heating and cooling energy demand of building envelopes, which were applied to a model building with en...

2017
D. I. Bradley A. M. Guénault D. Gunnarsson R. P. Haley S. Holt A. T. Jones Yu. A. Pashkin J. Penttilä J. R. Prance M. Prunnila L. Roschier

We demonstrate significant cooling of electrons in a nanostructure below 10 mK by demagnetisation of thin-film copper on a silicon chip. Our approach overcomes the typical bottleneck of weak electron-phonon scattering by coupling the electrons directly to a bath of refrigerated nuclei, rather than cooling via phonons in the host lattice. Consequently, weak electron-phonon scattering becomes an ...

2013
S. C. Pang M. A. Kalam I. A. Badruddin R. Ramli M. A. Hazrat

In this current era, increasing computing power, effort to reduce prototypes’ cost and time, and shorten design-toproduct time urges the need of numerical computation. Higher cooling’s load or requirement is attributed by higher power of engine. Also, higher quantity of heat exchangers and vehicles’ styling resulted limited space at vehicles’ hood. These factors have caused the design job of ve...

Journal: :Current Biology 2006
Clare J. Proudfoot Emer M. Garry David F. Cottrell Roberta Rosie Heather Anderson Darren C. Robertson Susan M. Fleetwood-Walker Rory Mitchell

BACKGROUND Chronic established pain, especially that following nerve injury, is difficult to treat and represents a largely unmet therapeutic need. New insights are urgently required, and we reasoned that endogenous processes such as cooling-induced analgesia may point the way to novel strategies for intervention. Molecular receptors for cooling have been identified in sensory nerves, and we de...

Hadi Pasdarshahri Moien Farmahini-Farahani

In this paper, exergy of conditioned air, exergy efficiency, irreversibility, and entropy generation of common models of evaporative cooling have been investigated in five cities of Iran. Direct evaporative cooling (DEC), indirect evaporative cooling (IEC), and two-stage IEC/DEC as the most popular methods of cooling have been modeled. Atmospheric conditions are considered as the dead state of ...

Journal: :Applied Thermal Engineering 2022

Day-and-night radiative sky cooling has emerged as a potential alternative to conventional technologies such refrigeration-based air conditioning and evaporative wet cooling. Both can passively achieve sub-ambient without consuming electricity. Although both techniques are subject impacts from various weather conditions, the extents of under same conditions not well understood. In this work, we...

The performance of proton-exchange membrane fuel cell cooling system using coolant flow channels enhanced with baffles was numerically investigated. To do this, the maximum temperature of the cooling plate, temperature uniformity and also pressure drop along the flow channels were compared for different cases associated with number of baffles and their dimensions inside the channels. The govern...

Numerical simulations of a three-dimensional model of impingement and film cooling on a flat plate are presented and validated with the available experimental data. Four different turbulence models were utilized for simulation, in which SST  had the highest precision, resulting in less than 4% maximum error in temperature estimation. A simplified geometry with periodic boundary conditions is de...

ژورنال: تحقیقات موتور 2020
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In this study, the Li-ion batteries temperature increase during the discharge process was measured empirically and evaluated using numerical simulation. Moreover, the battery packs cooling using the water, air and water-nano composition fluids such as water-alumina, water-copper oxide, and water-gold was studied through numerical simulation. Accordingly, the battery cooling was simulated by CFD...

2014
L. Lu W. Cai Wenjian Cai

This paper presents a universal engineering model, which can be used to formulate both counterflow and crossflow cooling towers. By using fundamental laws of mass and energy balance, the effectiveness of heat exchange is approximated by a second order polynomial equation. Gauss-Newton and Levenberg-Marquardt methods are then used to determine the coefficients from manufactures data. Compared wi...

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