ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Journal of Enhanced Heat Transfer
インパクトファクター: 0.562 5年インパクトファクター: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN 印刷: 1065-5131
ISSN オンライン: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2015007462
pages 499-509

SOLAR CALORIMETER FOR THERMAL TESTING OF GLAZINGS

E. V. Macias-Melo
Centro Nacional de Investigation y Desarrollo Tecnologico, Prol. Palmira Esq. Apatzingan, Cuernavaca, Mor, Mexico, C. P 62490
J. J. Flores-Prieto
Centro Nacional de Investigacion y Desarrollo Tecnologico-TecNM-SEP, Interior Internado Palmira s/n, Cuernavaca, Morelos, México, C.P. 62490

要約

The aim of this work was to develop a solar calorimeter for thermal testing of glazings, where indoor and outdoor heat transfer coefficients (hi and ho) can be pre-established. Development of the solar calorimeter includes designing, manufacturing, commissioning, and calibrating, where the calibration takes into account verification and characterization. The calorimeter was verified and characterized based on the first thermodynamic law, using both a reference specimen and reference glass. The incoming and outgoing heat fluxes were obtained by measuring changes in the internal energy of the working fluid, as well as by heat flux transducers in the walls. The tests were conducted outdoors at variable clearness conditions in a warm/humid climate. The calibration of the calorimeter revealed an uncertainty of5W of the heat flux through the sample, which implied a lower addition of uncertainty. The experimental solar heat gain coefficient (SHGC) of the reference glass was 0.810 with a deviation of 0.005 with respect to the reference value (0.815). The average hi and ho values were consistent with the standard heat transfer coefficients (8.4 and 9.1 W/m2°C), with variations of 0.4 and 3.5 W/m2°C, respectively, during daytime hours (700 to 1800 hrs.). However, during the nighttime hours hi varied 3.2 W/m2°C. Therefore, in the case of the reference glass, the daytime variations of hi and ho induced changes of the SHGC and U value that reached up to 0.012 and 0.77 W/m2°C, respectively.


Articles with similar content:

Optimization of Design and Process Parameters for Maximized and Stable Solar Receiver Efficiency
Second Thermal and Fluids Engineering Conference, Vol.18, 2017, issue
Nesrin Ozalp, Cédric Ophoff, S. Korotunov
OVERALL HEAT LOSS FROM BOTH SIDES OF A TILTED UNGLAZED SOLAR COLLECTOR UNDER INDOOR CONDITIONS USING FLOW CALORIMETRY AND THERMOGRAPHY
Journal of Enhanced Heat Transfer, Vol.22, 2015, issue 6
J. J. Flores-Prieto, O. Montoya-Marquez
OPTIMIZATION OF HUMIDIFIER DESIGN USING FIXED EFFECTIVENESS APPROACH FOR HDH SYSTEM
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017), Vol.0, 2017, issue
Ranjitha Raj P, Balakrishnan Shankar, J. S. Jayakumar
HEAT CONDUCTION IN ZEOLITE BEDS
International Heat Transfer Conference 7, Vol.2, 1982, issue
J. Volkl
CONDENSATION HEAT TRANSFER COEFFICIENT AND PRESSURE DROP OF R134a IN A TUBE: MODELING AND OPTIMIZATION
International Heat Transfer Conference 16, Vol.7, 2018, issue
Josua Petrus Meyer, Seyyed Mohammad Ali Noori Rahim Abadi, Mehdi Mehrabi