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the ORC system, measurement devices for all the other parameters listed in Table 3 need to become available through purchasing or other means. Remote Monitoring and Control Line: The remote monitoring and control is done from both UAF and ElectraTherm facility in Nevada simultaneously. For this purpose the broadband internet connection cables, static IP address and modem which are installed at the UAF Power Plant experimental site is completed. PROCUREMENT Considering the integrated testing system (ORC system plus supporting testing system), equipment purchased include the 65kW ORC system and most of the components used in steam loop, hot water loop, the open cooling water loop, electrical components used for electrical circuit, and sensors and data acquisitions components used for measuring/monitoring and control. Table 3 shows the major components used for steam, heating, cooling system, and electrical systems. Major components purchased for measurement/monitoring and control system include a National Instrument PXI board and SEXI modulus. In addition, steel and black iron hot water pipes, steam rubber hoses, wires, cables, structural materials, and related connection and construction materials were also in the purchase list. All the purchases have been completed before December 2011 except the sensors needed for measuring temperatures and pressures related to the performance of the ORC components and two Watt meters for pump power measurements, of which the purchases were completed in mid-January of 2012. Some of the components and construction tools (steam trap, steam to hot water heat exchanger, expansion tank, pipe grooving tool, cutting tool, welder, etc.) were borrowed from UAF facilities service and UAF power plant. One lesson learned is that procurement may become extremely time consuming for a remote city in a remote state. According to our experience, sometimes, even common structure materials may take a few days to become available. Table 2 Operation and Performance Parameters for data acquisition Hot water loop parameters Hot water temp out of Heat exchanger (to GM) Hot water temp into Heat exchanger (from GM) Cold water loop parameters Cold Water temp out of GM after bypass valves Cold Water temp out of GM condenser before pump GM parameters (sensors installed by our team) GM Condenser Outlet Temp (sensor on pipe surface) GM Evaporator Inlet Temp (sensor on pipe surface) GM parameters (sensors come with the ORC system) GM pump VFD Hz Expander Hi Pressure (PSIG) Electric power parameters Hot water pump power (Watts) Cold water pump power (Watts) Steam Inlet Temperature to Heat Exchanger Cold Water temp into GM Before Check Valve GM Ambient Temp GM Gross Power (kW) - NOT accurate GM net power output (Watts) Steam Condensate temperature Cold Water temp into GM just before GM GM Condenser Inlet Temp (sensor on pipe surface) Temperature difference between hot and cold water supply temperatures (F) GM Pump power (Watts) 23PDF Image | Optimizing Heat Recovery Systems for Power Generation in Rural AK
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