نتایج جستجو برای: thermal performance

تعداد نتایج: 1243895  

In this study, thermal performance of the collector with analytic and quasi-dynamic method is evaluated based on energy balance equations for each part of the U-pipe evacuated tube solar collector. Using this approach, effect of different parameters such as tube size, overall heat loss coefficient, absorber tube absorptivity, mass flow rate and air layer thermal resistance on thermal performanc...

Abstract: In order to improve the thermal management system for cooling an electric vehicle battery pack, the thermal performance of the battery pack in two states of charge and discharge in different working conditions by using a copper sheath around the batteries and a copper sheath, as well as a stair channel on top of the battery pack and using of nanofluid as cooling fluid, has been studie...

Journal: :international journal of mathematical modelling and computations 0
s. kavitha assistant professor mathematics section faculty of engineering and technology annamalai university tamilnadu, india india assistant professor mathematics section faculty of engineering and technology annamalai university, annamalai nagar, chidambaram tamilnadu, india nirmala p.ratchagar professor, department of mathematics, annamalai university annamalai nagar, tamilnadu, 608002, india india professor,department of mathematics,annamalai universityannamalai nagar,tamilnadu, 608002, india

this paper presents a simplifiedlagrangian multiplier based algorithm to solve the fixed head hydrothermalscheduling problem. in fixed head hydrothermal scheduling problem, waterdischarge rate is modeled as quadratic function of hydropower generation andfuel cost is modeled as quadratic function of thermal power generation. thepower output of each hydro unit varies with the rate of water discha...

In this study, the overall performance of air PV/T, based on energy and exergy analysis has been investigated. Two combinations of air PV/T, which consist of unglazed and glazed air PV/T, are considered. Thermal analysis and numerical calculations were carried out, and the performance parameters of the system for the climate conditions of Kerman were studied. The results are presented in graphs...

ژورنال: انرژی ایران 2019

Cooling is one of the most influential factors to provide thermal comfort. The inactive cooling systems for residential environments can help us consume non-renewable natural resources. The aim of this paper is to investigate the performance of solar windproof and chimney, saving in energy consumption, and reducing environmental problems. This research is implemented with a review of the Rasool...

2011
Dan Upton Kim Hazelwood

Temperature issues have become a first-order concern for modern computing systems. There are several approaches for dynamic thermal management, including reacting based on some threshold temperature, predicting based on history, or estimating localized temperatures based on performance counters. One possibility for more proactive management is to predict temperatures based on the upcoming instr...

2007
C. CODREANU N.-I. CODREANU V. V. N. OBREJA

The paper describes an in house made experimental set-up that measures the thermal conductivity of liquids. The measurement principle is based on the Transient Hot Wire Method. The theoretical bases of the measurement method are firstly presented, and then our original experimental implementation is described. The hardware as well as the software design reveals the simple configuration of the m...

2004
Efi Rotem Alon Naveh Micha Moffie Avi Mendelson

General purpose mobile processors present two new design challenges. The first is the need to achieve the best performance while fitting into limited thermal environment and the second is maximizing the battery life of the entire system. The Intel® Pentium® M processor has been developed specifically to target the mobile market and therefore, much emphasis was given to advanced mobile features ...

A simple semi-phenomenological model, which accurately predicts the dependence of thresholdcurrent for temperature of Resonant-phonon three well quantum cascade laser based on verticaltransitions is offered. We found that, the longitude optical phonon scattering of thermally excitedelectrons is the most important limiting factor for thermal performance of high frequency THz QCLs.In low frequenc...

Journal: :international journal of nano dimension 0
m. sahooli nano chemical eng. dep., faculty of advanced technologies, shiraz university, shiraz, iran. s. sabbaghi nano chemical eng. dep., faculty of advanced technologies, shiraz university, shiraz, iran. r. maleki nano chemical eng. dep., faculty of advanced technologies, shiraz university, shiraz, iran. m. m. nematollahi school of electrical and computer engineering, shiraz university, shiraz, iran.

statistical methods, and especially machine learning, have been increasingly used in nanofluid modeling. this paper presents some of the interesting and applicable methods for thermal conductivity prediction and compares them with each other according to results and errors that are defined. the thermal conductivity of nanofluids increases with the volume fraction and temperature. machine learni...

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