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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Advanced Power Server (APS): User’s Manual Table 11. iCHP Configuration Input Item Definition Choice of Mode that the iCHP heat - Bypass Operating Mode recovery unit operated in. - Electrical Priority - Thermal Priority Section Description Available Settings Setpoint Setpoint temperature of the water for the iCHP controller to control to. (Local means the local setting in the individual MicroTurbines memory.) - Local, set at each turbine. - APS User Set (32 to 221 °F) - APS I/O Select (See Appendix 2, Table of items of PLC Memory) Over Temperature Limit The temperature limit where the iCHP unit will declare an over temperature fault for various operating modes as listed. 120 to 221 °F Temperature Feedback Location of the temperature reading feedback location that the controller will use. (Local means the local sensor in the individual MicroTurbines.) - Local → HRM Inlet Temp - Local → HRM Outlet Temp - APS I/O Select (See Appendix 2, Table of items of PLC Memory) There are three primary operating modes as listed in Table 11. For Bypass mode, the iCHP unit will essentially be turned off and only recover a minimum amount of heat. In Electrical Priority mode, the iCHP unit in the individual MicroTurbines will vary the exhaust flow to the heat exchanger to try and regulate the water temperature to your chosen setpoint. This regulation of exhaust is done at the individual MicroTurbine level independent of the group’s regulation of electrical power. The temperature setpoint to regulate to, when in this mode, can be any of the three possibilities listed in Table 11 above. For temperature feedback location in this mode of operation, any of the three possibilities listed in Table 11 are available. Note that if the APS is selected for either setpoint or temperature feedback measurement, all Grid Connect groups that include iCHP units that are also in the Stand Alone group must use the identical setup. When operating in the Thermal Priority mode, the local option for the temperature setpoint and feedback is not available because the control is done by the APS at the group level and the control output is group power demand. This power demand is given to the individual MicroTurbines using the power dispatch mode of the group selected. The iCHP unit of the individual MicroTurbines is set to full heat recovery and thermal regulation is accomplished by raising/lower generator electrical output. For more details on general iCHP operational information and consideration regarding APS control, see the Capstone MicroTurbine User’s Manual (400001 or 400017), and APS Technical Reference (480023). Loading Software and/or a New Operational Configuration onto the APS Prior to installing software on the APS or updating the configuration, it is important to understand the structure and location of the program and configuration files. Figure 33 below shows the layout of the files in relation to the APS controller and the PC computer that is running APS-CRMS interface software. 400011 Rev A (June 2007) Page 39 of 67 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | ADVANCED POWER SERVER (APS) USER’S MANUAL
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