Different types of plate thermometers for measuring incident radiant heat flux and adiabatic surface temperature

1次元輻射半透過性媒体の輻射加熱に関して, 媒体の射出を考慮に入れて温度応答ならびに定常状態温度分布および熱流束分布を理論的に解析した.解析結果は本実験範囲内において実験結果と良好な傾向的一致を示し, 本理論解析の妥当性が確かめられた.また, 内部加熱効果が温度応答, 定常状態温度分布および熱流束分布に顕著な影響を及ぼし, その程度は入射輻射線の主要な振動数域における媒体の単色光学的厚さと境界壁の単色射出率の大きさに強く依存することを明らかにした.

Radiant heating

Internal heating

10.1252/kakoronbunshu.7.245

Cite

Citations (3)

Effect of the cooling of a radiation throttle on its characteristics with regulation of the density of the radiant heat fluxes

TepVT (1979)

L. Ia. Paderin

Radiant heat

Throttle

Radiative Cooling

Source

Cite

Citations (0)

Radiant Heat Transfer to Absorbing Gases Enclosed Between Parallel Flat Plates with Flow and Conduction

Thomas H. Einstein

Source

Cite

Citations (30)

Laminar heat transfer in a circular tube under solar radiation in space

International Journal of Heat and Mass Transfer (1970)

Satish Sikka Muhammad Iqbal

10.1016/0017-9310(70)90164-x

Cite

Citations (7)

Parametric analysis of radiant and convective heat transfer in underfloor heating system

صابرنعيمي امير رحيمي دکترمصطفي

Radiant Heating Systems by balancing four main convenience factors i.e., environment temperature, Radiant heating, air flow and relative humidity provide convenience for human. In these systems, high percentage of obtained heating is radiantly. In this study, surface radiant heat transfer rate with conductive and natural convective heat transfer in a model enclosure heated by radiant system is investigated experimentally and theoretically. For this purpose an enclosure by 240 240 240 cm3 is fabricated, then insulated and equipped by heating system and finally tested. A model based on the net-radiation method is employed to compute the radiation exchange between surfaces. The radiation model assumes opaque, diffuse and gray surfaces, a nonparticipating medium, and uniform incident and hence reflected energy flux and temperature. In this method internal and external surface temperature of enclosure for determining radiant heat transfer is required. For this study, the surface temperatures were measured using type k thermocouples and thermometer. In net radiation method, view factors and surface temperatures are required for computing radiant heat transfer. These calculations are done by MATLAB program. After calculation radiant heat transfer by net radiation method, conductive and convective heat transfer rate were computed. Results are shown, in the underfloor heating systems, 75-80 % heat transfer of floor and in radiant ceiling heating systems 90-98 % heat transfer of ceiling is radiation heat transfer.

Enclosure

Radiant energy

Radiant heating

Radiant cooling

Source

Cite

Citations (0)

Investigation of radiant heat exchange in a chamber of rectangular cross-section with an allowance for the presence of volumetric tones of an absorbing atmosphere

Yu. A. Surinov G. V. Skvortsova

Allowance (engineering)

Section (typography)

Source

Cite

Citations (0)

Simultaneous Heat and Mass Transfer on the Surface of Optically Thick Semitransparent Liquid Heated by a Radiant Heat Source

KAGAKU KOGAKU RONBUNSHU (1979)

Norio Arai Shinji Takahashi Masanobu Hasatani Sachio Sugiyama

外部のふく射熱源により加熱される光学的に厚い半透過性液体層の表面における熱および物質移動速度に対するふく射透過の影響について理論的ならびに実験的に検討した.半透過性液体の内部ふく射が無視しうる場合に有用とされている “cold semitransparent” の概念に基づいて, 液体層の表面温度, 層内温度分布および蒸発速度を理論計算した.この結果とふく射熱源として, 赤外線ランプ, 面ヒータを, 液体として, 水, ジエチルフタレートを用いた場合の実験の結果とは, ほぼ良好な一致を示し, 本理論解析法の妥当性が確かめられた.

Radiant heat

Radiant heating

10.1252/kakoronbunshu.5.118

Cite

Citations (5)

Parametric analysis of radiant and convective heat transfer in radiator

Abbas Najafzadeh Khosrowshahi Mostafa Rahimi

Radiators and Gas heaters are used for heating the buildings and rooms. In this study, surface radiant heat transfer rate with conductive and natural convective heat transfer in a model enclosure heated by radiator and gas heater is investigated experimentally and theoretically. For this purpose an enclosure by 2.4 2.4 2.4 m3 is fabricated, then insulated and equipped by heating system and finally tested. A model based on the net-radiation method is employed to compute the radiation exchange between surfaces. The radiation model assumes opaque, diffuse and gray surfaces, a nonparticipating medium, and uniform incident and hence reflected energy flux and temperature. In this method internal and external surface temperature of enclosure for determining radiant heat transfer is required. For this study, the surface temperatures were measured using type k thermocouples and thermometer. In net radiation method, view factors and surface temperatures are required for computing radiant heat transfer. These view factors calculations are done by FORTRAN program. After calculation radiant heat transfer by net radiation method, conductive and convective heat transfer rate were computed. Results are shown, in the radiator heating systems, 35% heat transfer of radiator and in gas heater heating systems 35% heat transfer of gas heater is radiation heat transfer. Also, the results indicate that the heat transfer from or to the enclosure walls is mainly by convection, but the bottom surface is heated by radiation.

Enclosure

Radiator (engine cooling)

Radiant energy

Source

Cite

Citations (0)