Sunday, June 25, 2017: 11:00 AM-12:30 PM
HVAC&R Systems and Equipment
Chair:
Joshua New, Ph.D., Oak Ridge National Lab
Air conditioning of large spaces such as athletic stadiums and warehouses often involves different and more complex versions of the issues encountered in more common applications like offices and schools. This session reports results of CFD modeling to improve comfort with reduced capacity requirements in a large football stadium, results of a design study for a chiller retrofit and a project that provided required conditioning of a large pharmaceutical warehouse using less than half the energy of a conventional design. The final paper examines the implications of recent Legionnaires disease outbreaks for microbiological control in cooling towers.
1 Air Flow Regimes in an Air Conditioned Playground Zone of Open-Roof Football Stadium (LB-17-C007)
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Essam E. Khalil, Cairo University Faculty of Engineering |
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Esmail ElBialy, Dr.Ing., Cairo University Faculty of Engineering |
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Waleed AbdelMaksoud, Ph.D., P.E., Cairo University Faculty of Engineering |
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Mohamed E. Ashmawy, P.E., Cairo University Faculty of Engineering |
This paper examines developing air conditioning systems in the playground zone of a stadium by employing several kinds of technologies to cool the outdoor spaces. The most serious challenge of air conditioning in a playground zone in stadium is controlling the temperature and humidity in the outdoor area and also the enormous energy needed by the cooling system to maintain thermal comfort conditions within the football playground area. The main task for the analyzed model was to ensure the better method to distribute air to achieve the human comfort level for players and reducing the cooling capacity of playground zone by using a large sunshade to reduce the sun's rays and maintain the stadium's temperature.
3 Case Study of Chiller Selection for the Retrofit of a Large Building Cooling System (LB-17-C009)
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James Turcato, California State Polytechnic University at Pomona |
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Kevin Anderson, Ph.D., P.E., California State Polytechnic University at Pomona |
This paper describes the chiller selection design and procurement process for a building thermal management system. The design procedures described in this paper are based on those carried out during an energy efficiency engineering internship in a local Los Angeles company and thus serving as an example of real world training. This paper presents the results of a case study to replace chillers that are approaching the end of their useful life. This case study is an example of how engineering interns are exposed to the various ASHRAE Standards. The retrofit project was carried out according to specifications and drawing of the existing obsolete equipment and adhering to Standard 90.1 “Minimum Requirements for Chillers” and the ASHRAE “Chiller Life Expectancy” guidelines used to govern chiller selection and installation. Results for COP lift versus load and chiller load versus system load are presented in the paper.