In this paper,we give a relationship between projective generators（resp.,injective cogenerators） in the category of R-modules and the counterparts in the category of complexes of R-modules.As a consequence,we get th...In this paper,we give a relationship between projective generators（resp.,injective cogenerators） in the category of R-modules and the counterparts in the category of complexes of R-modules.As a consequence,we get that complexes of W^--Gorenstein modules are actually W-Gorenstein complexes whenever W is a subcategory of R-modules satisfying W⊥W,where W^- is the subcategory of exact complexes with all cycles in W.We also study when all cycles of a W-Gorenstein complexes are W^--Gorenstein modules.展开更多
In this paper, all existing methods for cost allocation in cogeneration are analysed, and then a new method is proposed. The new method considers both the difference between heat and power and in heat under different ...In this paper, all existing methods for cost allocation in cogeneration are analysed, and then a new method is proposed. The new method considers both the difference between heat and power and in heat under different temperature, and the effect of anergy in heating,which is more rationable than any existing method, and easy to understand and calculation.展开更多
A typical analytical solution of single shaft constant rotating speed gas turbine partload performance as well as its cogeneration part-load performance is derived based onanalytical typical component-mainly compresso...A typical analytical solution of single shaft constant rotating speed gas turbine partload performance as well as its cogeneration part-load performance is derived based onanalytical typical component-mainly compressor, turbine and heat recovery steam generatorperformances. The derivation of appropriate component analytical performances is the keyto successfully obtain typical analytical performances of gas turbine and its cogeneration.The main criteria to select component performance analytical forms are given. Besidestheoretical meaning discussed in a succeeding paper, analytical solution can serve as thestandard solution to check the numerical solution and to improve the computational method.展开更多
基金Supported by National Natural Science Foundation of China(Grant Nos.11301240,11371187 and 11101197)the Young Scholars Science Foundation of Lanzhou Jiaotong University(Grant No.2012020)
文摘In this paper,we give a relationship between projective generators（resp.,injective cogenerators） in the category of R-modules and the counterparts in the category of complexes of R-modules.As a consequence,we get that complexes of W^--Gorenstein modules are actually W-Gorenstein complexes whenever W is a subcategory of R-modules satisfying W⊥W,where W^- is the subcategory of exact complexes with all cycles in W.We also study when all cycles of a W-Gorenstein complexes are W^--Gorenstein modules.
文摘In this paper, all existing methods for cost allocation in cogeneration are analysed, and then a new method is proposed. The new method considers both the difference between heat and power and in heat under different temperature, and the effect of anergy in heating,which is more rationable than any existing method, and easy to understand and calculation.
文摘A typical analytical solution of single shaft constant rotating speed gas turbine partload performance as well as its cogeneration part-load performance is derived based onanalytical typical component-mainly compressor, turbine and heat recovery steam generatorperformances. The derivation of appropriate component analytical performances is the keyto successfully obtain typical analytical performances of gas turbine and its cogeneration.The main criteria to select component performance analytical forms are given. Besidestheoretical meaning discussed in a succeeding paper, analytical solution can serve as thestandard solution to check the numerical solution and to improve the computational method.
