TY - JOUR
TI - A new approach in CHP steam turbines thermodynamic cycles computations
AU - Grković Vojin R
AU - Živković Dragoljub S
AU - Guteša Milana M
JN - Thermal Science
PY - 2012
VL - 16
IS - 12
SP - 399
EP - 407
PT - Article
AB - This paper presents a new approach in mathematical modeling of thermodynamic  cycles and electric power of utility district-heating and cogeneration steam  turbines. The approach is based on the application of the dimensionless mass  flows, which describe the thermodynamic cycle of a combined heat and power  steam turbine. The mass flows are calculated relative to the mass flow to low  pressure turbine. The procedure introduces the extraction mass flow load  parameter νh which clearly indicates the energy transformation process, as  well as the cogeneration turbine design features, but also its fitness for  the electrical energy system requirements. The presented approach allows fast  computations, as well as direct calculation of the selected energy efficiency  indicators. The approach is exemplified with the calculation results of the  district heat power to electric power ratio, as well as the cycle efficiency,  versus νh. The influence of νh on the conformity of a combined heat and power  turbine to the grid requirements is also analyzed and discussed. [Projekat  Ministarstva nauke Republike Srbije, br. 33049: Development of CHP  demonstration plant with gasification of biomass]