Experimental assessment and model validation of a vertical cooling panel

Abstract The energy used for cooling has increased in recent decades and the predicted future rise in consumption is driving a pressing need for more efficient technologies. Some technologies use environmental sinks as heat dissipation alternatives. This paper presents a model validation with experimental data from a passive vertical cooling panel. The novelty of the solution lies in two main characteristics. The first is that the panel is in a vertical position, and thus the heat sink is the ambient temperature and surrounding instead of the sky temperature. The second is that the panel is north-oriented. Avoiding the sun lengthens the operating time to the entire day, while most studies explore options that are limited to night radiation. The aim is to include this element as a heat exchanger before water moves into the cooling tower from the condenser stage in cooling systems. The results have shown that the model approaches significantly the experimental data with an average error of 1.5% in the dissipated heat. Besides, the cooling capacity of the panel varies from 107 to 230 W/m2 depending on the inlet temperature and fluid flow conditions, confirming the viability of the integration in buildings.

[1]  C. Willmott.  ON THE VALIDATION OF MODELS , 1981 .

[2]  J E Heath,et al.  Heat exchange by the pinna of the African elephant (Loxodonta africana). , 1992, Comparative biochemistry and physiology. Comparative physiology.

[3]  M. R. Heras,et al.  Modelling and experimental analysis of three radioconvective panels for night cooling , 2015 .

[4]  Taewoo Lee,et al.  Thermal and flow measurements , 2008 .

[5]  S. M. Shiva Nagendra,et al.  Passive alternatives to mechanical air conditioning of building: A review , 2013 .

[6]  César Martín-Gómez,et al.  Performance simulation of heat recovery ventilator cores in cascade connection , 2017 .

[7]  Jiang He,et al.  A design supporting simulation system for predicting and evaluating the cool microclimate creating effect of passive evaporative cooling walls , 2011 .

[8]  César Martín-Gómez,et al.  Redesign of the integration of building energy from metabolisms of animal: the RIMA project , 2015 .

[9]  M. Yazdanian,et al.  Measurement of the Exterior Convective Film Coefficient for Windows in Low-Rise Buildings , 1993 .

[10]  César Martín-Gómez,et al.  Thermal energy performance in working-spaces from biomorphic models: The tuna case in an office building , 2016 .

[11]  Evyatar Erell,et al.  Radiative cooling of buildings with flat-plate solar collectors , 2000 .

[12]  Mario Grosso,et al.  A Hybrid Passive Cooling Wall System: Concept and Laboratory Testing Results , 2015 .

[13]  Ravindra Kirar,et al.  Comparative Analysis of Wind Loss Coefficient (Wind Heat Transfer Coefficient) For Solar Flat Plate Collector. , 2012 .

[14]  Yiping Wang,et al.  Effect of radiation and convection heat transfer on cooling performance of radiative panel , 2016 .

[15]  Mattheos Santamouris,et al.  Passive cooling dissipation techniques for buildings and other structures: The state of the art , 2013 .

[16]  Zhu Li,et al.  Performance analysis on a building-integrated solar heating and cooling panel , 2015 .

[17]  Shuo Zhang,et al.  Cooling performance of nocturnal radiative cooling combined with microencapsulated phase change material (MPCM) slurry storage , 2012 .

[18]  Jiang He,et al.  Experimental study of practical applications of a passive evaporative cooling wall with high water soaking-up ability , 2011 .

[19]  T. Mahlia,et al.  Potential energy savings by radiative cooling system for a building in tropical climate , 2014 .

[20]  Mattheos Santamouris,et al.  Cooling the buildings – past, present and future , 2016 .

[21]  Javier Bermejo Busto,et al.  MEJORA DE UN SISTEMA DE CLIMATIZACIÓN CON CÉLULAS PELTIER A PARTIR DE LA COLMENA DE ABEJAS: UNA APROXIMACIÓN TEÓRICA , 2016 .

[22]  G. Feng,et al.  An Experimental and Analytical Study of a Radiative Cooling System with Flat Plate Collectors , 2015 .

[23]  W. Beckman,et al.  Solar Engineering of Thermal Processes , 1985 .

[24]  Craig Christensen,et al.  Identifying and Resolving Issues in EnergyPlus and DOE-2 Window Heat Transfer Calculations , 2012 .

[25]  Elham Hosseinzadeh,et al.  An Experimental and Analytical Study of a Radiative Cooling System with Unglazed Flat Plate Collectors , 2012 .