Cooling load differences between radiant and air systems

被引:87
作者
Feng, Jingjuan [1 ]
Schiavon, Stefano [1 ]
Bauman, Fred [1 ]
机构
[1] Univ Calif Berkeley, Ctr Built Environm, Berkeley, CA 94720 USA
关键词
Radiant cooling; Cooling load; Heat gain; Air system; Radiant cooling panel (RCP); Embedded surface cooling systems (ESCS); Thermally activated building systems (TABS);
D O I
10.1016/j.enbuild.2013.06.009
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Unlike the case of air systems where the cooling load is purely convective, the cooling load for radiant systems consists of both convective and radiant components. The objectives of this simulation study were to investigate whether the same design cooling load calculation methods can be used for radiant and air systems by studying the magnitude of the cooling load differences between the two systems over a range of design configurations. Simulation results show that (1) zone level 24-h total cooling energy of radiant systems can be 5-15% higher than air systems due to higher conduction load through the envelope; (2) peak cooling rate at the radiant cooled surface can be 7-35% higher than air system for zones without solar load. This difference can increase up to 85% for floor system in zones with solar load; (3) the peak cooling rate differences originate from: (a) radiant cooling surface(s) reduce radiant heat gain accumulation in the building mass; (b) only part of the convective heat gain becomes instantaneous cooling load. As a result, tools using response factor methods such as radiant time series method for cooling load calculations are not appropriate for radiant system design. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:310 / 321
页数:12
相关论文
共 41 条
[1]  
Achermann M., 2003, RADTEST RADIANT HEAT
[2]  
[Anonymous], 2012, 11855 ISO
[3]  
[Anonymous], 2011, ENERGYPLUS ENG REF
[4]  
[Anonymous], 2012, ENERGYPLUS EN SIM SO
[5]  
ASHRAE, 2007, 140 ANSIASHRAE
[6]  
ASHRAE, 2012, ASHRAE HDB HVAC SYST
[7]  
ASHRAE, 2009, 1382009 ANSIASHRAE
[8]   Fundamentals of green chemistry: efficiency in reaction design [J].
Sheldon, Roger A. .
CHEMICAL SOCIETY REVIEWS, 2012, 41 (04) :1437-1451
[9]  
Babiak J., 2007, LOW TEMPERATURE HEAT
[10]   Solar radiation and cooling load calculation for radiant systems: Definition and evaluation of the Direct Solar Load [J].
Causone, Francesco ;
Corgnati, Stefano P. ;
Filippi, Marco ;
Olesen, Bjarne W. .
ENERGY AND BUILDINGS, 2010, 42 (03) :305-314