Diagnosis on the economy of regenerative heater based on Equivalent Enthalpy Drop Theory;

The heat efficiency of different mode of drainage recycling is calculated and analyzed by heat balance method and equivalent enthalpy drop method in this paper,which provides the quantitative date for thermodynamic system energy.

Steam turbine exhaust enthalpy is known in calculation using the equivalent enthalpy drop method.

An example is given on the new 300MW air cooling unit,which is studied by using a positive balance and counter-balance methods respectively,the characteristics and calculation results for the methods are compared to demonstrate that equivalent heat drop has an greatly advantage in increasing unit s performance and conducting local energy loss analysis,and raising energy saving measures.

The quantitative calculation and analysis of the thermal economy for the steam feed water pump system were performed using the theory of equivalent heat drop.

This paper descrsibes the analysis and comparison between different technical innovations for decrease exit gas temperature of boiler №2,analyses and computes the economic efficiency quantitatively with the method of equivalent heat drop.

By a strict mathematic derivation, a matrix expression form of the extraction steam efficiency in constant Equivalent heat drop method, is derived, and the equivalence between normal energy balance method and Equivalent heat drop method, has been proved.

In this paper the authors apply equivalent heat drop method to the steam-water flow distribution calculation for the secondary-cucirt thermodynamic system of PWR power plant,based on the normal energy balance method.

Combined with q-γ-τ matrix equation, the paper constructed the mathematics model of temperature difference of heater for absorbed heat by mathematics derivation strictly, and pointed out that correlative model in equivalent heat drop method is approximated.

Combining with the requirement of unit energy-saving reformation,based on the theory of equivalent enthalpy drop method,the influence of temperature difference between heater terminals and steam extraction pressure loss on the thermal efficiency of the regenerative heating system of an introduced 300 MW unit was analyzed quantitatively.

Then,based on the improved ideal cycle thermal efficiency,equivalent enthalpy drop method is improved,and the ideal equivalent enthalpy drop method is proposed.

Based on the equivalence principle and the reciprocity theorem, the multiple scattering up to Nth-order by N parallel 2-D targets arbitrarily located in a plane wave/Gaussian beam is considered.

A new equivalence principle of current control for shunt active power filters is introduced, which having no use for measurement of harmonic and reactive currents of nonlinear loads.