Development and Evaluation of a Night Ventilation Precooling Algorithm

Braun, James E.; Zhong, Zhipeng

doi:10.1080/10789669.2005.10391147

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…Most existing small buildings are in this category, because night operation of fans results in significant additional energy use. The system efficiency of a plant designed for 50°F (10°C) supply air does not improve much as ambient temperature drops, even at the optimal part-load point (Andresen and Brandemuehl 1992;Armstrong et al 2006;Aynur et al 2006;Brandemuehl et al 1990;Braun 1990Braun , 2003Braun , 2006Braun et al 2001;Braun and Chaturvedi 2002;Braun and Mercer 2003;Braun and Zhong 2005;Calobrisi et al 1980;CEC 1996;Chiu and Zaloudek 1987;Conniff 1991;Eto 1984;Henze et al 1997;Kallen 1982;Braun 1996, 1997;Morris et al 1994;Perkins 1984;Rabl and Norford 1988;Ruud et al 1990;Stoecker et al 1981;Sun et al 2006).…”

Section: Literature Reviewmentioning

confidence: 97%

Efficient Low-Lift Cooling with Radiant Distribution, Thermal Storage, and Variable-Speed Chiller Controls—Part II: Annual Use and Energy Savings

Armstrong¹,

Jiang²,

Winiarski³

et al. 2009

HVAC&R Research

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This paper evaluates the cooling efficiency improvements that can be achieved by integrating radiant cooling, cool storage, and variable-speed compressor and transport motor controls. Performance estimates of a baseline system and seven useful combinations of these three efficient low-lift inspired cooling technologies are reported. The technology configurations are simulated in a prototypical office building with three levels of envelope and balance-of-plant performance: standard-, mid-and high-performance, and in five climates. The standard performance level corresponds to ANSI/ASHRAE/IESNA Standard 90. 1-2004 Energy Standard for Buildings Except Low-Rise Residential Buildings (ASHRAE 2004a. From the savings estimates for an office building prototype in five representative climates, estimates of national energy saving technical potential are developed. Component and subsystem models used in the energy simulations are developed in a companion paper.

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Section: Literature Reviewmentioning

confidence: 97%

Efficient Low-Lift Cooling with Radiant Distribution, Thermal Storage, and Variable-Speed Chiller Controls—Part II: Annual Use and Energy Savings

Armstrong¹,

Jiang²,

Winiarski³

et al. 2009

HVAC&R Research

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“…2a shows a sample 24-h variation in sol-air temperature for Arcata, CA (California climate zone 1) on August 1st based on TMY2 data. The zone temperature variation was chosen based upon typical results associated with conventional night setup control in small commercial buildings [14], as shown in Fig. 2b.…”

Section: Article In Pressmentioning

confidence: 99%

“…For analyzing the use of building thermal mass, it is very important to consider transient heat transfer within the floor slab and underfloor materials [14]. One approach involves solution of two-or three-dimensional transient conduction equations using finite-difference or finite-element methods.…”

Section: Introductionmentioning

confidence: 99%

A simple method for estimating transient heat transfer in slab-on-ground floors

Zhong¹,

Braun²

2007

Building and Environment

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“…The notion of taking advantage of diurnal temperature differences without significant energy expenditure, can result in "low cost" savings depending on the infrastructure in place. The opportunity for applying such measures has been demonstrated with studies that indicate night ventilation results in annual electrical cost reductions of up to 17% [14,15]. In addition to energy consumption reductions, in some instances passive preconditioning allows the replacement of the building air mass with fresher air from outside, improving the occupancy comfort [16].…”

Section: Nesting Ratiomentioning

confidence: 99%

“…The literature also suggests that the long-term climate trends at the location of the building under question is a major factor for decision making in preconditioning strategies [14,26]. The variations in preconditioning effectiveness are easy to pinpoint when comparing sites across completely different climates [27].…”

Section: Nesting Ratiomentioning

confidence: 99%

Development of a Numerical Weather Analysis Tool for Assessing the Precooling Potential at Any Location

2016

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Precooling a building overnight during the summer is a low cost practice that may provide significant help in decreasing energy demand and shaving peak loads in buildings. The effectiveness of precooling depends on the weather patterns at the location, however research in this field is predominantly focused in the building thermal response alone. This paper proposes an analytical tool for assessing the precooling potential through simulations from real data in a numerical weather prediction platform. Three dimensionless ratios are developed based on the meteorological analysis and the concept of degree hours that provide an understanding of the precooling potential, utilization and theoretical value. Simulations were carried out for five sites within the Sydney (Australia) metro area and it was found that they have different responses to precooling, depending on their proximity to the ocean, vegetation coverage, and urban density. These effects cannot be detected when typical meteorological year data or data from weather stations at a distance from the building were used. Results from simulations in other Australian capitals suggest that buildings in continental and temperate climates have the potential to cover substantial parts of the cooling loads with precooling, assuming appropriate infrastructure is in place.

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Development and Evaluation of a Night Ventilation Precooling Algorithm

Cited by 6 publications

References 8 publications

Efficient Low-Lift Cooling with Radiant Distribution, Thermal Storage, and Variable-Speed Chiller Controls—Part II: Annual Use and Energy Savings

Efficient Low-Lift Cooling with Radiant Distribution, Thermal Storage, and Variable-Speed Chiller Controls—Part II: Annual Use and Energy Savings

A simple method for estimating transient heat transfer in slab-on-ground floors

Development of a Numerical Weather Analysis Tool for Assessing the Precooling Potential at Any Location

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