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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Capstone MicroTurbine Fuel Requirements Fuel System Evaluation Concerns The fuel system evaluation concerns include the items presented in the following paragraphs. Gaseous Fuel Temperature High or low temperature limits of the MicroTurbine raise concerns regarding liquid formation, high vapor pressure, high density, and high viscosity. High or low temperature extremes may also cause damage to the materials of construction of the fuel system component parts. Degradation of Fuel System Components, Metals, and Elastomers Fuel contaminants, additives, as well as some hydrocarbons may corrode or attack critical fuel system components. Combinations of contaminants such as water with hydrogen sulfide may lead to even more severe corrosion effects. Temperature may also accelerate the corrosive effects of some fuels. Water Condensation and Freezing in a Gaseous Fuel System The presence of condensed water or ice will result in fuel system malfunction and eventual system shut down. Provisions must be taken to maintain the gaseous fuel 10 °C (18 °F) above the water dew point temperature (freezing point), throughout the fuel system. This includes up to and including the fuel manifold. Liquids in a Gaseous Fuel System The presence of liquids in a gaseous fuel, either from the fuel, or from the fuel gas compressor lubricating oil, may result in fuel system malfunction. It is important to maintain the gaseous fuel at 10 °C (18 °F) above the dew point temperature throughout the fuel system. This includes up to and including the fuel manifold. In addition, provisions must be made for purging the fuel system upon shutdown, and/or prior to startup. Rotary Flow Compressor Life (BB – RFC) Excessive gaseous fuel temperatures or corrosive contaminants will cause early failure. Sub- atmospheric inlet pressure to the compressor can also result in air leaking into the gas fuel supply and the consequent risk of an explosive mixture. Sub-atmospheric inlet pressure will result in reduced Ball Bearing Rotary Flow Compressor (BB-RFC) life. Rotary Flow Compressor Life (FB – RFC) Excessive gaseous fuel temperatures or corrosive contaminants will cause early failure. Sub- atmospheric inlet pressure to the compressor can also result in air leaking into the gas fuel supply and the consequent risk of an explosive mixture. 410002-001 Rev A (DRAFT) Page 20 of 31 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the equipment ratings, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Technical Reference Capstone MicroTurbine Fuel Requirements
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