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This paper discusses how to increase the efficiency of a plant by implementing a trigeneration solution. There have been analyzed two refrigeration technologies: compression and absorption. Since the purpose of the district heating plant is to use the heat engines to produce as much electricity as possible, which will further be sold, and to utilize the available thermal energy, the implementation...
We analyze in this paper the influence of modifying the MEA (MonoEthanolAmine) concentration, from 25 % to 32 %, on the performances of the coal-fired TPP with CCS (CO2 Capture and Storage) by means of a validated numerical modeling of a coal-fired TPP (Thermal Power Plant) and the simulations in the HYSYS software based on an experimental CO2 post-combustion capture installation. The computations...
CO2 Capture and Storage (CCS) is a way to limit the impact of the power plants on the environment. Using the numerical modeling, the paper analyzes the impact of the post-combustion CCS on the coal-fired Thermal Power Plants (TPP) internal consumptions. The steam turbine power is decreased by the steam flow rate requested by the CO2 capture process. The power consumed by the cooling pumps decreases...
During the heat transfer, due to temperature differences, a share from the heat exergy content is destroyed. Consequently, the use of heat exchangers in thermodynamic cycles declines their efficiencies. The paper presents an original model for computing the exergy destruction during the heat transfer in a superheated steam generator. The model was applied for a Concentrated Solar Plants with molten...
The objective of this paper is to reduce the energy consumption required for the CO2 capture process, by optimizing the temperature at the inlet of the solvent desorption unit. This paper presents a numerical simulation on the CO2 capture installation in our university. The simulation of the CO2 post-combustion capture process is made by using the HYSYS 3.2 software. This topic is adequate in what...
The paper starts with a comparative analysis of two configurations for residential Combined Heat and Power Plants (CHPP), both with Reciprocating Gas Engines (RGE). The basic version relies on recovering the RGE's heat losses (from the oil, the engine block, the compressed air and the flue gases), in order to warm the heat carrier. Since the gases temperature is higher than the necessary one to the...
The paper compares 2 configurations of power plants for residential cogeneration, using gas turbines. The reference solution considers that the flue gases heat is recovered for directly warming the heat carrier. Because the gases thermal level is higher than the necessary level at the consumer, we continue by quantifying and analyzing the technical advantages of increasing the electricity production,...
Recovery of waste heat from the electrical generator into the water preheating circuit of the Steam Thermal Power Plants (STPP) is a method frequently used to increase electricity production without additional consumption of primary energy. However, the manufacturers of turbine-generator sets do not explicitly indicate the effect of the method on their performances. Using numerical modeling of steam...
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