Optimal cold source heating network heater and determination method for parameter thereof
A heat network heater and a technology for determining methods, which are applied in the energy field, can solve problems such as energy waste and unreasonable selection of heat network heaters, and achieve the effects of increasing economic benefits, reducing throttling losses, and increasing power generation
Active Publication Date: 2013-05-01
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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[0003] The purpose of the present invention is to solve the problem of energy waste caused by unreasonable selection of heating network heaters in the current heating system described in the background technology, and propose a method for determining the best cold source heating network heater
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[0021] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0022] to combine Figure 5 , take the 300MW heat supply machine of Harbin Steam Turbine Plant as an example. Such as Figure 4 As shown, the minimum exhaust pressure P of intermediate pressure cylinder 1 z is 0.25MPa. The pressure of the cogeneration system is designed to be the minimum exhaust pressure of the medium-pressure cylinder when it is running without throttling. The pressure of 0.25MPa is equal to the inlet pressure of the low-pressure cylinder, and equal to the inlet pressure of the heating network heater 5, such as figure 1 shown. According to the performance curve of the low-pressure cylinder, the inlet pressure P of the low-pressure cylinder 2 is known L =0.25MPa, the intake steam flow D of the l...
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The invention discloses an optimal cold source heating network heater and a determination method for parameters thereof, belonging to the technical field of energies. The parameters of the optimal cold source heating network heater are determined according to the lowest exhaust steam pressure of a middle-pressure cylinder to ensure that the pressure of a heat and power cogeneration system is the lowest exhaust steam pressure of the middle-pressure cylinder when the heat and power cogeneration system runs under no-throttling working conditions, i.e. the crossing point of a low-pressure cylinder performance curve and a heating network heater performance curve is the lowest exhaust steam pressure of the middle-pressure cylinder. Thereby, when the heat and power cogeneration system works under full working condition, the throttling loss during steam extraction for heat supply is reduced, the generated energy of the heat supply unit is improved and the economic benefit of the thermal powerplant is enhanced.
Description
technical field [0001] The invention relates to the field of energy technology, in particular to a method for determining an optimal cold source heating network heater. Background technique [0002] With the continuous increase of the scale of urban central heating, cogeneration central heating develops rapidly, but the current heating units usually meet the maximum heat supply, the thermal power plant is out of touch with the heating network, and the heating network heater is in use In the process of extracting steam and releasing heat to heat the water in the heating network, the minimum exhaust pressure of the medium-pressure cylinder cannot be fully utilized, and the throttling loss of the valve is very large when heating and extracting steam, resulting in a waste of energy grade and increasing the energy consumption due to heating. Electricity loss due to steam extraction. Therefore, the heating network heater should be reasonably selected according to the minimum exha...
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IPC IPC(8): F01K17/02
CPCY02E20/14Y02P80/15
Inventor 杨勇平林振娴何坚忍胡学伟翟启武
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)