Heat rate curve in power system
The heat rate curve plots the heat energy required per MWH of generated electrical output for the generator as a function of the generator’s MW output. Thus, the heat rate curve indicates the efficiency of the unit over its operating range.
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6 FAQs about [Heat rate curve in power system]
What is a heat rate curve?
Thus, the heat rate curve indicates the efficiency of the unit over its operating range. Generally, units are least efficient at the minimum and maximum portions of their MW output capability and most efficient somewhere in the middle of their operating range. The vertical axis is plotted in MBtu/MWH and the horizontal axis is plotted in MW.
What is the difference between fuel cost curve and heat rate curve?
The fuel cost curve specifies the cost of fuel used per hour by the generating unit as a function of the unit’s MW output. This is a monotonically increasing convex function. The heat rate curve plots the heat energy required per MWH of generated electrical output for the generator as a function of the generator’s MW output.
What are heat rate characteristics?
2. Heat rate characteristics, which is the ratio of fuel input to energy output measured in Btu/KWh, and is the slope of the input-output curve. A lower heat rate means higher fuel efficiency. 3.
Which thermal unit is most efficient at a minimum heat rate?
The thermal unit is most efficient at a minimum heat rate, which corresponds to a particular generation PG. The curve indicates an increase in heat rate at low and high power limits. To convert the input-output curves into cost curves, the fuel input per hour is multiplied with the cost of the fuel(expressed on Rs./million kCal).
What are the input-output characteristics of thermal power plants?
This document discusses the input-output, heat rate, and incremental cost characteristics of thermal power plants. It defines input-output characteristics as a plot of fuel input versus power output. Heat rate is the ratio of fuel input to energy output and is the slope of the input-output curve.
What is incremental heat rate curve?
The incremental heat rate curve is the change in heat input required to produce the next MW of output. It varies with the output level. In mathematical terms, it is the first derivative of the heat input function. In PJM, units can have offers based on incremental heat rates using a sloped function or a stepped function.