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Optimizing Heat Recovery Systems for Power Generation in Rural AK

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Optimizing Heat Recovery Systems for Power Generation in Rural AK ( optimizing-heat-recovery-systems-power-generation-rural-ak )

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Chapter 10 Data Analysis This chapter discusses the analysis results derived from experimental data and other information observed during the reliability and performance tests: ANLYSIS RESULTS FROM RELIABILITY TEST: Based on observation obtained from the reliability test, some inferences in reliability, feasibility, and maintenance and operation requirements are given below: 1. The system is reliable (Under normal operation condition, no foreseen technical problems are expected for long term operation). 2. To operate the system doesn’t need advance technology background. The only thing that is special and needs to be remembered for operating the GM is the need of using medium temperature heating source to start the GM. It is recommended designing the heating and cooling loops with the capability of heating and cooling process control for startup. This will make the startup just as simple as pushing the Start button. The design of heating and cooling process control is a standard practice. 3. The maintenance requirements of the system don’t need advanced technology background and the GM maintenance process can be combined with the routine diesel generator maintenance schedule. Since virtually no defects were found during the reliability test, the maintenance requirements were expected as simple as to follow the items listed in the Maintenance Items list recommended by the manufacturer. The routine maintenance schedule includes quarterly, semi-annual, annual, and bi-annual maintenance items. Quarterly maintenance items are basically inspections (i.e. visually inspect plumbing for leakage oil/water and brackets, connections, bolts, conduit, wire, etc.). Semi-annual (e.g., replace filter/dryer element), annual (e.g., check heat exchanger pressure- drop in hot and cold water supply), and bi-annual (e.g. replace pressure relief valves) maintenance items could be combined with the routine maintenance schedule of the diesel generator and carried out by the diesel power plant engineers. 4. The technology is feasible for rural Alaska villages (i.e. the easiness in installation, operation, and maintenance requirements). The performance data obtained from the reliability test shows that the ORC system can consistently generate a gross power of 50.1kW (i.e. rated power of the GM) and a net output power of 46.4kW (i.e. difference between the Gross power and the required working fluid pump power of the ORC system) under the condition of sufficient heating source and sufficient cooling source. Based on this result, the potential of the GM in emission reduction, CO2 reduction, fuel savings, and payback period are evaluated and listed below in Table 15: 49

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