The Calculation Methods of the Specific Fuel Rate in Combined Heat and Electricity Production

Nauka i Obrazovanie

I. A. Chuchueva¹ 

[1] Mathematical Bureau;

关键词: combine production of heat and electricity;    CHP;    specific fuel rate;    linear characteristic curves of steam turbine;   

DOI  :  10.7463/0216.0832949

来源: DOAJ

【 摘 要 】

The paper discusses a specific fuel rate in combined heat and electricity production using CHP technology. There are two objectives for calculation of specific fuel rate: a) CHP technical efficiency estimate, b) increasing CHP competitiveness at electricity and district heat markets. Currently, development of a number of thermo-dynamical methods of calculation solves the first problem while to solve the second one there is a number of developed economical methods of calculation. In Russia despite a decade of the wholesale electricity market progress the CHP market offers are still tightly connected with technical efficiency rate. To estimate the technical efficiency rate is widely used the least effective thermo-dynamical method – so called “physical” method”. The paper formulates a problem statement that is the specific fuel rate calculation and reviews the most widely applied methods. The review consists of two parts: in the first the Russian methods are discussed, and in the second one the methods widely used in the countries with highly developed electricity and district heat markets. A new thermo-dynamical method to calculate the specific fuel rate is introduced, which uses the linear characteristic curves of a steam turbine. The developed method allows us to take into consideration the energy inequality of the CHP products. Another advantages of this new method are calculation simplicity and small number of input data. To compare the effectiveness of different methods were introduced comparison rules and also calculations were performed. The comparison of thermo-dynamical methods shows that the most effective methods are an exergy method and also the method that takes into consideration the reduced generation of electricity (work method). Calculation complexity and large number of input data are main disadvantages of these methods. The comparison of economical methods shows that the most effective from stated point of view are a benefit and risk distribution method and a method of the alternative way of heat production. A drawback of these methods is that the volatility of market prices is raised with their wide application. The paper separately discusses results of calculations by “physical” method. It comes to conclusion that application of this the least effective thermo-dynamical method to calculate the cost of CHP products puts the brakes on the progress of market relations in electricity and district heat.

【 授权许可】

Unknown