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Performance test: Chapter 9 Performance Testing and Results Performance test on GM is conducted mainly to learn the performance characteristics of the GM and its components (expander, evaporator, condenser, pump etc.) at different hot water and cold water flow rates and temperatures. The purpose of this test is also to create performance characteristic charts of the GM at different heat source and heat sink conditions. The GM was planned to be tested at 5 different hot water flow rates, 5 different hot water temperatures, 3 different cold water flow rates and 2 different cold water temperatures. The list of hot water and cold water temperatures at which GM will be tested is given in Table 9. The planned total number of performance tests that would be conducted on GM to be 150. The procedure of performing this test (i.e. method of changing temperatures and flow rate, data collection etc) is explained in “Operation Procedure” section of this chapter. Preparation work and check list for performance test is similar to reliability test and the readers are requested to refer to the chapter “Reliability test”. Table 9: Various hot water and cold water flow rates at which GM will be tested Hot water temperatures (oF) Hot water flow rate (gpm) Cold water temperatures (oF) Cold water flow rate (gpm) 155 120 175 160 195 200 215 250 225 300 50 120 60 (tentatively) 160 200 Operation Procedure: 1. First the cold water flow rate is set at desired value by turning the manual flow rate valve near the fire hydrant. The temperature of cold water from fire hydrant is around 50oF. 2. At this cold water flow rate we than set the desired hot water supply temperature to GM by operating steam flow control valve using LABVIEW software. 3. Now by varying the hot water pump VFD frequency (e.g. VFD frequency of 24Hz corresponds to 120gpm of hot water flow), we set the desired hot water flow rate. The hot water flow rate can be read in BTU meter display is in cubic- meter/hour. 4. After setting all the four parameters (hot water and cold water flow rates and temperatures) at desired conditions, we wait for approximately 15minutes for steady state data collection. 5. Steady state data collection is done for 30minutes at one set of hot water and cold water temperature and flow rate. All the sensor data (i.e. temperatures, pressures, 42PDF Image | Optimizing Heat Recovery Systems for Power Generation in Rural AK
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