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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 5 Installation and Instrumentation Installation and instrumentation started around mid November 2011 and most of the work has been done within 3 weeks. The rest, which includes sensors to the GE components and Watt meters to the hot water and cold water pumps, were installed in January 2012. Detection, rectification, and modifications were also part of this task. All the installation work (e.g., wiring, piping) followed existing industrial standards and codes and also followed Chapter 1 (Green Machine Installation Requirements) of the ElectraTherm manual. Since regulations, safety, and reliability are important to this project, experts (e.g. contractors, UAF power plant, UAF Facilities Service, ACEP, and CEM) in related areas were consulted for piping, wiring, and control system design and installation. All the work was done internally by UAF personnel, including engineers in the units of the Facilities Service, Power Plant, and ACEP. Other individuals contributed to this work including many students and a few CEM machine shop and ME Department staff and faculty members. A brief list is given below describing relative important information related to the installation and instrumentation (Please also refer to Figure 4, Table 2, and Table 3): Steam Loop: Piping: Steel pipe or steam rubber hose (300oF and 30psi). Joints: Threaded with sealant or welding. Steam/hot water heat exchanger: Eccentric condensate flange for outlet of steam side. Heat exchanger: A designed frame is used to keep an appropriate height of the water outlet position. Hot Water Loop: Piping: 4” black iron pipe with GruLok joints. Struts structures are used to support the 150ft pipe system at many critical locations. 20 hp pump: A designed structure is used to support the potential large bending load. Pipe entering and exiting the ORC system and by pass pipe (including a control valve): Steel pipe provided by the ORC manufacturing for entering, exiting, and by pass pipes. A designed supporting structure is required for the overhung pipes and the valve. BTU meter (ultra sonic): 5D distance is required in the upstream side. The flow meter need to be installed in the cold side pipe. Cold Water Loop: Piping: 4” rubber hose and fire hydrant clamps are used. A check valve is also installed to prevent reverse flow. Pumps: Need structure to support the bending load. Inlet, exiting, and by pass pipes (including controlled valves) of the ORC system: Support structure is required for the overhung pipes and the valve. BTU meter (ultra sonic): 5D distance is required in the upstream side. Electrical Circuit: 26

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