Abstract
Prospects for increasing the efficiency of heat and electric energy-generation and heat-and-power supply at thermal power plants obviously draw attention to such modern and innovative technologies as heat pumps. Heat pumps allow efficient redistribution of energy flows. The abundance of low-potential heat carriers and heat sources in the cycle arrangement of the thermal power plants operation requires modernization of production and increase of the fuel heat utilization factor, therefore, reduction of specific fuel consumption for the production of heat and electricity. This paper analyzes the influence and practicability of introducing heat pumps into the heating circuit of the return water of the heat network of power units with PT-80 and T-250 turbines. Heat pumps of various configurations provide invariant energy conversion factor and efficiency. To assess energy and economic efficiency, modeling of the operation of power units and calculation of heat pump circuits for various refrigerants are performed. The economic effect is represented in quarterly cash savings of operating costs.
Highlights
Energy efficiency of manufacturing is the key issue of qualitative changes, that is, optimization and modernization of the industry, especially in conditions of energy intensity of products. This is expressed in a decrease of specific costs of the reference fuel for electricity generation and heat supply [1], as applied to thermal power plants (TPP)
heat pump (HP) have been used in practice abroad for more than half a century [2,3,4], but they still have not found wide distribution in the Russian Federation due to the cheapness of energy resources and “conservative” approaches in relation to the heat-andpower supply
Because of the constant level of HP power the specific fuel consumption for the production of heat energy is constant for each option of HP and refrigerants (R12, R22, R134a) and are 104.12 g/(kW∙h) and 117.91 g/(kW∙h) for power units with PT-80 and T-250 turbines, respectively
Summary
Energy efficiency of manufacturing is the key issue of qualitative changes, that is, optimization and modernization of the industry, especially in conditions of energy intensity of products. This is expressed in a decrease of specific costs of the reference fuel for electricity generation and heat supply [1], as applied to thermal power plants (TPP). Despite all the prospects and advantages of using HPs in the heating cycle, the question of their influence on the operating modes of equipment and TTP in general requires additional researches
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