The average convective heat transfer coefficients of the tube bundles in most previous investigations were based on the difference between the bulk fluid temperature and the average surface temperature of the tubes. However, the tubular heat exchanger design process uses the concepts of overall thermal...
Operative temperature [°C] In this study, because the bedroom shapes and window proportions vary for each participant, the convective heat transfer coefficient (αa) and the radiative heat transfer coefficient (αr) are defined as follows. α a = αr The calculation formula for OT Ave is ...
Consequently, it was found that when the average convective heat transfer coefficients on each surface of the Low Re model were applied to each surface ... Haruo SOEDA,Daisuke NARUMI - Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 被引量: 0发表: 2021年...
The convective heat transfer characteristics in a periodic converging–diverging heat exchanger channel are investigated experimentally. Experiments were p... I Taymaz,I Koc,Y. Islamoglu - 《Heat & Mass Transfer》 被引量: 12发表: 2008年 Study of the Thermal Effectiveness of Laminar Forced Convectio...
solid, radiative, and convective (the latter component includes sensible and latent heat transport). Solid conduction results from the vibrational transfer of energy between atoms comprising the material lattice of regolith particles. This type of conduction increases with particle size and bulk density ...
3.NEW ANALYSIS OF RECUPERATIVE GAS TURBINE CYCLES--WITH THE RELATIONSHIP BETWEEN HEAT TRANSFER TEMPERATURE DIFFERENCE AND PRESSURE DROP INCLUDED燃气轮机回热循环进一步新析—考虑平均传热温差与流阻的关系 4.A FORMULA FOR AVERAGE CONVECTIVE COEFFICIENTIN LAMINAR BOUNDARY LAYER OVER A PLATE WITHUNHEATED LEADIN...
where kair is the thermal conductivity of the air, andh¯conv is the convective heat transfer coefficient in the surface of the component, which is defined as (4)h¯conv=qconv"Tsurf-Tref where qconv", the convective heat flux in the surface of the component, can be expressed as the...
Journal of Heat TransferXin RC, Ebadian MA (1997) The effects of Prandtl numbers on local and average convective heat transfer characteristic in helical pipes. J Heat Transf 119:467-473R. Xin, M. Ebadian, The effects of Prandtl numbers on local and average convective heat transfer ...
When ambient temperature is more than the normal body temperature, blood circulation to the skin and peripheral tissue increases with vasodilatation of peripheral blood vessels to transfer more heat from core to the skin surface and to hasten evaporative and convective heat loss from skin, thereby ...
convective heat-transfer coefficient hU0nrex一ShU换热系数(。onveetive heat一transfer eoeffi-cient)对流换热的强度可用牛顿公式Q~a(T,一Tf)F表述,式中Q表示面积为F的固体表面上每秒钟与流体交换的热量;T.和孔分别为固体表面和流体的温度;a为换热系数。显然牛顿公式本身就是a的定义式,它表示单位固体表面积上...