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ASHRAE Transactions

Heat transfer pathways in underfloor air distribution systems

Heat transfer pathways in underfloor air distribution systems Fred S. Bauman Please note that the following two statements have been added as a result of the peer-review process for this paper: Results of heat gain shown in this theoretical steady-state model may be greater than those found in actual practice for UFAD systems. This may […]

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ASHRAE Transactions

Application of NFPA 130 for emergency evacuation in a mass transit station

Application of NFPA 130 for emergency evacuation in a mass transit station Kai Kang ABSTRACT This paper presents an analysis of an emergency evacuation during a mid-platform train fire in a mass transit station. A time-based scenario is first developed, taking into account the inaccessibility of the stairs due to smoke obscuration. The exiting calculation […]

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ASHRAE Transactions

Improved supermarket refrigeration and heat recovery system

Improved supermarket refrigeration and heat recovery system Vasile Minea ABSTRACT The main issues facing the supermarket refrigeration industry are the phaseout of ozone-depleting refrigerants and the improvement of refrigeration waste heat recovery. The system presented in this paper involves secondary fluid loops on both condensing and refrigerating sides, with water-to-air heat recovery heat pumps. This […]

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ASHRAE Transactions

Low-temperature heat storage for solar heating and cooling applications

Low-temperature heat storage for solar heating and cooling applications Christian Schweigler ABSTRACT In solar thermal installations with large capacity, both solar cooling and solar heating are provided synergistically, yielding a complete annual utilization. During the cold season, solar heat serves for space heating. During the warm season, solar heat is converted into useful cold by […]

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ASHRAE Transactions

Best practices for energy-efficient data centers identified through case studies and demonstration projects

Best practices for energy-efficient data centers identified through case studies and demonstration projects William Tschudi TRACT Energy benchmarking is useful in comparing performance of data center facilities, and can be a powerful tool to help identify why certain energy-intensive systems perform better than others. Through studies of over 22 data centers, when analyzing how the […]

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ASHRAE Transactions

Two-dimensional CFD and conduction simulations of heat transfer in horizontal window frames with internal cavities

Two-dimensional CFD and conduction simulations of heat transfer in horizontal window frames with internal cavities Arild Gustavsen ABSTRACT This paper assesses the accuracy of the simplified frame cavity conduction/convection and radiation models presented in ISO 15099 and used in software for rating and labeling window products. Temperatures and U-factors for typical horizontal window frames with […]

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ASHRAE Transactions

Thermal resistance of a window with an enclosed venetian blind: guarded heater plate measurements

Thermal resistance of a window with an enclosed venetian blind: guarded heater plate measurements Ned Y.T. Huang ABSTRACT Window solar gain is known to have a strong influence on building energy consumption and peak cooling load. Venetian blinds are routinely used to control solar gain. Software based on one-dimensional models is available to accurately predict […]

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ASHRAE Transactions

Cooling load and environmental measurements in a Canadian indoor ice rink

Cooling load and environmental measurements in a Canadian indoor ice rink M. Ouzzane ABSTRACT This paper presents the preliminary measurements performed in an indoor ice rink. The results include the cooling load, the air temperature variation at several locations, the ice temperature, and the brine temperature. The measured data will be used for the verification […]

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ASHRAE Transactions

Definition of standard office environments for evaluating the impact of office furniture emissions on indoor VOC concentrations

Definition of standard office environments for evaluating the impact of office furniture emissions on indoor VOC concentrations Randal D Carter INTRODUCTION An evolving variety of sometimes conflicting test methods, model office environments, and requirements for modeling volatile organic compound (VOC) emissions from office furniture have been specified by various US organizations from 1989 to the […]