Adjusting method for heating steam of cogeneration system

A technology of combined heat and power generation and regulation method, applied in the field of energy, which can solve the problems of waste of energy grade, inability to regulate, large throttling loss of steam, etc.

Inactive Publication Date: 2010-03-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0002] With the increasing scale of urban central heating, cogeneration central heating develops rapidly, but the current heating units usually only meet the maximum heat supply, and the thermal power plant is out of touch with the heating network. The heat load does not match the d

Method used

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  • Adjusting method for heating steam of cogeneration system
  • Adjusting method for heating steam of cogeneration system
  • Adjusting method for heating steam of cogeneration system

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Embodiment Construction

[0038] First, according to the basic principle and calculation formula of the heating system, the curve of the outdoor temperature and the temperature of the supply and return water of the heating network is obtained, as shown in figure 1 shown.

[0039] Such as figure 2 As shown, according to the temperature change of the supply and return water of the heating network and the characteristics of the heating network heater, the functional relationship between the return water of the heating network and the steam extraction parameters is obtained. According to the basic theory of heat transfer, the temperature rise of the water side of the heating network is characterized by It is the heat absorbed per unit mass of water in the heating network, and the pressure drop of extraction steam is characterized by the heat release per unit mass of steam, so as to obtain the performance curve of heating extraction steam flow and heating extraction pressure of the heating network heater, ...

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Abstract

The invention discloses an adjusting method for heating steam of a cogeneration system, which belongs to the energy technical field, can improve the heat efficiency of a central heating system greatlyand can improve the heating efficiency of a heating unit. In the method, based on the corresponding reasonable use of the temperature of the heating steam of the cogeneration system, a heat supply network, a heat supply network heater and the hating unit are considered as an integral system, so as to provide the heating steam extraction parameter accurately and reduce the throttle loss in the heating process; the heating load of a heat user changes along with the change of the outdoor temperature, namely, the return water supply temperature of the heat supply network is changed, so as to change the steam extraction parameter of the heating unit; due to the associated coordination of the heat supply network, the heat supply network heater and the hating unit, the heating steam extraction parameter is matched with the external heating load requirement, so as to produce heating water or domestic hot water that meets the heating requirement; thereby not only meeting the comfort requirement of the heat user, but also improving the generated energy of the heating unit and increasing the economic benefit of a heating power plant.

Description

technical field [0001] The invention belongs to the field of energy technology. In particular, the invention relates to a method for adjusting heat supply steam of a combined heat and power system, which can greatly improve the thermal efficiency of a central heating system and increase the heat supply efficiency of a heating and heating unit. Background technique [0002] With the increasing scale of urban central heating, cogeneration central heating develops rapidly, but the current heating units usually only meet the maximum heat supply, and the thermal power plant is out of touch with the heating network. The heat load does not match the demand heat load of the heating area, resulting in a waste of energy grade; during the operation of the cogeneration heating unit, it cannot be adjusted accurately and flexibly according to the change of heat load during the heating period, and there is a large throttling loss of steam. Therefore, how to reduce throttling loss to furth...

Claims

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Application Information

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IPC IPC(8): F01K17/02F01D17/00F01D15/10
CPCY02E20/16Y02E20/14
Inventor 何坚忍林振娴胡学伟翟启武杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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