| Energy saving and emission reduction is the inevitable choice to construct a resource saving and environment-friendly society. It is significant to save energy on power plant which cost great amount of coals in the country. Integration power system of solar and power plants, which integrates solar energy into the conventional coal-fired unit, provides new way to energy conservation in coal-fired plants and large-scale use of solar.Contrasting different types of solar collector and different mix-running types of power plant with solar and coal, we find that the integrating system of combining regenerative system in power plant with solar energy which uses parabolic trough solar thermal collectors is the best choice, so we choose this integrating system as investigated subject.According to the analysis method which is from simpler to more complex, the theory of the constant-heat equivalent enthalpy drop is firstly analyzed. Via strict deduction and demonstration, a general matrix for the energy loss of auxiliary steam-water components under the constant-heat condition is deduced, and then constant-heat equivalent enthalpy drop matrix equation of coal-fired unit is demonstrated so as to complete constant-heat equivalent enthalpy drop method. Based on the analysis of constant-heat equivalent enthalpy drop matrix equation, the constant-heat equivalent enthalpy drop matrix equation of the integrating system is derived. This equation includes all information of the integrating system and corresponds with the structure of integration thermodynamic system, so it is universal, regular and suitable for computerization and calculation software development and thermal economic analysis on the integrating system of combining regenerative system in power plant with solar energy is accomplished.Taking 600MW reheat unit as an example, the present article analyzes very aspect. Results verify that the matrix equation is correct. |
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