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Session 2533

DEMONSTRATIONS AND CAMPUS FACILITIES FIELD TRIPS FOR A HEATING, VENTILATION AND AIR CONDITIONING COURSE

Frank Wicks Union College Schenectady, New York, 12308

ABSTRACT A field trip is taken to our adjacent physical This paper will describe a set of class room facilities building where the operation of the central demonstrations and on campus field trips that have been chillers, evaporative cooling towers and central heating developed to supplement the class room lectures in the boilers are observed along with the central computer heating, ventilation and air conditioning (HVAC) that monitors and controls the temperatures of the course. The value of these demonstrations and field trips buildings throughout the campus. is to provide the students with an enhanced Another field trip is taken to the ice rink in which understanding of the design control and operation of chillers are observed and analyzed along with the HVAC equipment and then to mathematically model chilled brine loop between the evaporator and rink floor. this equipment for the performance of perform various Another trip is to see an air conditioner that types of analysis such as thermodynamic processes and combines desiccant drying and evaporative cooling and cycles, liquid and air flow for pumping and fan power, that was designed by a student for a senior project. heat exchanger siring and performance and This paper will further describe these thermodynamic and psychometrics. demonstrations and on campus field trips and the subsequent student reports and comments that 1. Introduction demonstrate the effectiveness of these demonstrations The Heating Ventilation and Air Conditioning and visits to the campus physical facilities. (HVAC) course at Union College is generally taken by seniors in the Mechanical Engineering and it represents 2. Description an application of the principles they have learned in This section will describe the various earlier thermodynamics, heat transfer and fluids. demonstrations and field trips, and corresponding The objective of the course is first to teach how analysis performed on the equipment. existing HVAC systems work and then to define possibilities to make systems more energy efficient via WINDOW AIR CONDITIONER the options of decreasing demand or increasing the A 6,000 Btu hr window type air conditioner using efficiency of the supply or by better computer based freon 22 is instrumented for flow rate, high and low side control. pressures and temperatures at each point as shown in The author has been teaching this course for four Figure 1. This air conditioner is instrumented to years which had previously been totally instructed by measure freon flow rate (lbm/hr), temperatures at each lecture. A formal laboratory could have enhanced the point (F) and high and low side pressures. educational process but time and funds did not exist. Thus the instructor has developed a combination of HVAC class room demonstrations and campus field trips in lieu of a formal laboratory. The first class room demonstration is operating and measuring the pressures, temperatures and flow rates on an instrumented window type air conditioner and from these measurements analyze the cycle, heat exchangers and electric power requirement. Subsequent class room demonstrations are measuring dry and wet bulb temperatures as an introduction to psychometric analysis and measuring the performance of a Peltier effect cooler that is used in automobiles. Figure 1 Instrumented Window Air Conditioner

American Society for Engineering Education Energy Conversion and Conservation Division Impacts of Changing Technology Session Annual Conference and Exposition, Seattle, June 30, 1998

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Wicks, F. (1998, June), Demonstrations And Campus Facilities Field Trips For A Heating, Ventilation And Air Conditioning Course Paper presented at 1998 Annual Conference, Seattle, Washington. 10.18260/1-2--7013