Optimal supply air temperature with respect to energy use in a variable air volume system

被引：60

作者：

Engdahl, F ^{[1
]}

Johansson, D ^{[1
]}

机构：

[1] Lund Univ, Byggnadsfys LTH, S-22100 Lund, Sweden

来源：

ENERGY AND BUILDINGS | 2004年 / 36卷 / 03期

关键词：

heating; ventilation and air-conditioning; supply air temperature; variable air volume system;

D O I：

10.1016/j.enbuild.2003.09.007

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In a variable air volume (VAV) system with 100% outdoor air, the cooling need in the building is satisfied with a certain air flow at a certain supply air temperature. To minimize the system energy use, an optimal supply air temperature can be set dependent on the load, specific fan power (SFP), chiller coefficient of performance, outdoor temperature and the outdoor relative humidity. The theory for an optimal supply air temperature is presented and the heating, ventilation and air-conditioning (HVAC) energy use is calculated depending on supply air temperature control strategy, average U-value of the building envelope and two outdoor climates. The analyses show that controlling the supply air temperature optimally results in a significantly lower HVAC energy use than with a constant supply air temperature. The optimal average U-value of the building envelope is in practise mostly zero. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：205 / 218

页数：14

共 15 条

[1]

ENGDAHL F, 2002, UNPUB ENERGY BUILDIN

[2]

HARDERUP E, 1995, 3025 LUND U

[3]

Hittle DC, 1997, ASHRAE J, P50

[4] Dynamic performance of an electronic zone air temperature control loop in a typical variable-air-volume air conditioning system [J].