Performance Evaluation of Hybrid Radiant Cooling System Integrated with Decentralized Ventilation System in Hot and Humid Climates

Air-conditioning systems account for nearly one-third of the energy consumption in tropical buildings. In summer, mechanical cooling systems become a must especially in office buildings to keep the indoor environment comfort. In this study, a normal office room is designed to evaluate a novel cooling system based on a hot and humid climate. This novel cooling system is considered to serve such climate, which integrates radiant cooling panel, decentralized ventilation, and an Airbox convector. The Airbox convector is designed to deal with condensation risk and provide additional cooling output. In order to evaluate this novel system, it is compared with conventional all-air system and normal radiant system with decentralized ventilation regarding to the system capacity, energy consumption and thermal comfort. Results show that this novel system is adaptable to such climates and capable to reduce the condensation risk and overall cooling energy consumption.

[1]  Jianlei Niu,et al.  Energy savings potential of chilled-ceiling combined with desiccant cooling in hot and humid climates , 2002 .

[2]  Joon-Ho Choi,et al.  Energy and exergy analyses of advanced decentralized ventilation system compared with centralized cooling and air ventilation systems in the hot and humid climate , 2014 .

[3]  Hansjürg Leibundgut,et al.  Evaluation of the humidity performance of a novel radiant cooling system connected with an Airbox convector as a low exergy system adapted to hot and humid climates , 2014 .

[4]  Luca Baldini,et al.  Advanced building ventilation system based on the paradigms of decentralization and exergy minimization using a highly interlaced network structure for the supply and a sensor-based local control approach for the exhaust , 2009 .

[5]  H. Manz,et al.  Impact of air leakages and short circuits in ventilation units with heat recovery on ventilation efficiency and energy requirements for heating , 2001 .

[6]  Luca Baldini,et al.  Decentralized cooling and dehumidification with a 3 stage LowEx heat exchanger for free reheating , 2014 .

[7]  Stanley A. Mumma,et al.  Simplified cooling capacity estimation model for top insulated metal ceiling radiant cooling panels , 2004 .

[8]  Jiyong Eom,et al.  Energy use in buildings in a long-term perspective , 2013 .

[9]  Jianlei Niu,et al.  Indoor humidity behaviors associated with decoupled cooling in hot and humid climates , 2003 .

[10]  Luca Baldini,et al.  Energy analysis of a decentralized ventilation system compared with centralized ventilation systems in European climates: Based on review of analyses , 2016 .

[11]  Kwang Woo Kim,et al.  A 50 year review of basic and applied research in radiant heating and cooling systems for the built environment , 2015 .

[12]  Xiaodong Cao,et al.  Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade , 2016 .

[13]  Duanmu Lin,et al.  An investigation on life-cycle energy consumption and carbon emissions of building space heating and cooling systems , 2015 .

[14]  Manuel Duarte Pinheiro,et al.  From indicators to strategies: Key Performance Strategies for sustainable energy use in Portuguese school buildings , 2014 .

[15]  Refrigerating.  ASHRAE handbook and product directory /published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc , 1977 .

[16]  Jyotirmay Mathur,et al.  Performance evaluation of radiant cooling system integrated with air system under different operational strategies , 2015 .

[17]  Jelena Srebric,et al.  A critical review on the performance and design of combined cooled ceiling and displacement ventilation systems , 2002 .

[18]  Stanley A. Mumma,et al.  Impact of Mixed Convection on Ceiling Radiant Cooling Panel Capacity , 2003 .

[19]  Hansjürg Leibundgut,et al.  Advanced Airbox cooling and dehumidification system connected with a chilled ceiling panel in series adapted to hot and humid climates , 2014 .

[20]  Hansjürg Leibundgut,et al.  A case study on feasible performance of a system combining an airbox convector with a radiant panel for tropical climates , 2014 .

[21]  Shinsuke Kato,et al.  Study on indoor thermal environment of office space controlled by cooling panel system using field measurement and the numerical simulation , 2005 .