Free cooling potential of air economizer in residential houses in Canada

Li, Bo; Wild, Peter; Rowe, Andrew

doi:10.1016/j.buildenv.2019.106460

Cited by 12 publications

(2 citation statements)

References 22 publications

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“…Economizer control has significant energy saving potential in commercial buildings. Numerous studies recently explored the effect of diverse economizer control types on energy conservation [19][20][21][22][23][24][25][26][27][28][29][30][31]. Yao and Wang investigated the energy savings potential of temperature-based and enthalpy-based economizer cycles on VAV systems using a simulation program.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the cooling hours and cooling energy costs were calculated when the TSAs were 15 • C, 18 • C, 21 • C, and 24 • C. The reduction rates in cooling energy costs were 10%, 18%, and 25% compared to the TSA of 15 • C, respectively [15]. On the other hand, some researchers focused on optimization-based strategies [28] and damper controls [23] to improve the energy efficiency of economizer controls. As for building type, economizer controls have been applied in a variety of building types, such as data centers [24][25][26][27], office buildings [19,21], and residential homes [28,29].…”

Section: Introductionmentioning

confidence: 99%

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Energy Conservation Potential of Economizer Controls Using Optimal Outdoor Air Fraction Based on Field Study

2020

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In commercial buildings, HVAC systems are becoming a primary driver of energy consumption, which already account for 45% of the total building energy consumption. In the previous literature, researchers have studied several energy conservation measures to reduce HVAC system energy consumption. One of the effective ways is an economizer in air-handling units. Therefore, this study quantified the impact of the outdoor air fraction by economizer control type in cooling system loads based on actual air-handling unit operation data in a hospital. The optimal outdoor air fraction and energy performance for economizer control types were calculated and analyzed. The result showed that economizer controls using optimal outdoor air fraction were up to 45% more efficient in cooling loads than existing HVAC operations in the hospital. The energy savings potential was 6–14% of the differential dry-bulb temperature control, 17–27% of the differential enthalpy control, 8–17% of the differential dry-bulb temperature and high-limit differential enthalpy control, and 16–27% of the differential enthalpy and high-limit differential dry-bulb temperature control compared to the no economizer control. The result of this study will contribute to providing a better understanding of economizer controls in the hospital when the building operates in hot-humid climate regions.

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