13 11 ( 1 73 ) doi 1.399/j.issn.173-737.13.11.3 1 1 (1. 1. 1) (Air-side economizer) 1% 5 equest 1 3 TU31.3 + 1 A 173-737(13)11-13- WANG Qiu-jian 1, PAN Yi-qun 1, HUANG Zhi-zhong (1.School of Mechanical Engineering, Tongji University, Shanghai 1, China;.Sino-German College of Applied Sciences, Tongji University, Shanghai 1, China) As air-side economizer has a significant energy saving rate, the ability to improve IAQ and other advantages, it is being paid more and more attention by industry insiders. However, many air-side economizers implemented in China could not achieve 1% ratio of maximum introduced outdoor air to total supply air. Therefore, this study employed the dynamic building energy simulation program equest to compute the energy savings of a prototype shopping mall model applying economizers under dual-enthalpy, dual-temperature and fixed temperature control strategies in Beijing, Shanghai, Chengdu, Xi an and Harbin to analyze how the energy-saving ratio(esr) of economizer responds to variable ratio of maximum outdoor air to supply air. air-side economizer; free cooling; maximum ratio of outdoor air to supply air; shopping mall; energy simulation (air-side economizer) % 1995 (water-side economizer) 15 m (free cooling) 13-7-9 13-9-9 [1]
[] [1] ASHRAE 9.1 [15] [3-5] [] EnergyPlus 1% [7] 5% 1 3 [] 1. Ye Yao 35~ 1% Kuei-Peng Lee [9] ASHRAE 9.1 17 17 equest 1 3 17 A(33%) 3C(3%) C(9%) 3 3A equest 1 5% 5 AirTest Economizer 1 equest Control Design Guide a White Paper [1] 1.1 equest equest equest DOE- [11-1] [1-1] 1. O. Seppanen [13] 1 3D 1 33 m 7 1 3.5 m 1 1~ 7 1
1 Table 1 Detailed information of prototype building model 1.3 W/(m K).53 W/(m K) 3.7 W/(m K) SHGC=.97 VT=.71 COP=5. 7 5.5 9 5.5 1 % 11.1.7 W/GPM Pa.7 1 / 3 1 5% 5 W/m 15 W/m 11 W/m 13 W/m 1 W/m 1 W/m 5 W W m / 3 m / m / 5 m / 3 m / m 3 /( h) [19] cy and Renewable Energy 5 equest 5 3.1( 3.1% 9% [] ) 1 3D 1 MWh Fig.1 3D model equest 5 1% 75% 5%% CSWD Energy Efficien- 3
3 Fig. Energy use of prototype models in five cities without air-side economizer (a) Fig.3 The change of HVAC energy saving and ESR with various maximum outdoor air rates in different cities Table Outdoor air conditions offive cities / /% / /(kj/kg) 1. 55.3. 7.79 37. 1. 75.9 1.1 1. 3. 1.57 1.1 13..5 3. 1.5. 7.7 5.97 37.9..3. 3.77 3. /MWh /MWh 3 5 15 1 5 1 1 1 1 1 1% 75% 5% % / 3 3 3.1 3 1%.7% ~13.7% 3 3 % % m 3 31% 1% % 1.% % ASHRAE 9.1 % ( 3.9 5 1.33 ) 3 1 1
/MWh /MWh /MWh 5 1 5 1 5 5 1 5 1 5 5 1 5 1 5 1% 75% 5% % (b) 1% 75% 5% % (c) 1% 75% 5% % (d) (a) (b) (c) e- QUEST 1 h 1% 5. (a) 3. 3 3 3 () 3 Fig.3 The change of HVAC energy saving and ESR with various maximum outdoor air rates in different cities 1 1 1 1 1 1 1 1 1 1
/MWh 1 1 1 1 1% 75% 5% % (e) (a) (b) Fig. The change of HVAC ESR with various maximum outdoor air rates under different economizer control strategies 1.33 3.9 3 () Fig.3 The change of HVAC energy saving and ESR with various maximum outdoor air rates in different cities 1 1 1 1 1 1 1 1% 75% 5% % 1% 75% 5% % 1 9 7 5 3 1
/h 1 1 1 1 1 1 3 5 3 5 1 5 1 5 1% 75% 5% % 5 Fig.5 The change of HVAC ESR with various maximum outdoor air rates in Shanghai (c) Fig. Economizer cycle time of different air-side economizers in different cities 3 5 equest 1 3 (1) () Fig. The change of HVAC ESR with various maximum outdoor air rates under different economizer control strategies % 3% % 5% % 7% % 9% 1% 11%
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