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Technical Paper

A Combined Cycle With Gas Turbine Topping and Thermodynamically Ideal Gas Turbine Bottoming

1992-08-03
929012
It has been shown that the ideal fuel burning engine, which is named the Wicks Cycle, can be implemented as a three process gas turbine cycle consisting of isothermal compression, heat addition and reversible adiabatic expansion to the ambient temperature as well as ambient pressure. However, such a cycle operating at typical fuel combustion temperatures requires excessive pressure ratios. This paper examines whether such a cycle, or a gas turbine cycle with compressor intercooling, may be a realistic bottoming cycle in a combined cycle plant, as an alternative to either existing practice steam cycles or to the proposed alternative Kalina Cycle.
Technical Paper

Development of a Model to Predict Electric Vehicle Performance Over a Variety of Driving Conditions

1992-08-03
929135
Although electric vehicles have nearly a 100 year history, there is a dramatic new level of interest as a result of a combination of improved component technology, air pollution control legislation, and the resulting response and announcements by automobile manufacturers in the development of high performance electric vehicles. These performance announcements are typically in terms of range at a particular speed and acceleration. However, vehicles will operate over a wide range of conditions. This paper develops a mathematical model of an electric vehicle in terms of power and energy requirements and conversion components, and presents an equivalent circuit model of the batteries as a function of the charge condition, with the battery parameters obtained from charge-discharge testing, and demonstrates the use of this model to predict vehicle performance over a variety of driving and battery conditions.
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