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The energy supplier analyzed in this paper has 2 Rolls-Royce engines (M1&M2), running on natural gas, and producing 6.8 MWe of power and 5.6 MWth of heat each. In order to cover the heat demand during winter, the plant functions with both M1&M2 and one of the two hot water boilers (HB), the new one 58MWt or the old one 29MWt. One major problem consists in large and often variations of the...
Given the great potential of biomass in Romania, companies that use endothermic processes have the possibility switching from fossil fuel to a cheaper and more available alternative. Furthermore, through cogeneration they can reduce costs, by producing electricity for own consumption. While wooden biomass has an inferior low heat caloric value, organic fluids can be used to harvest the heat, where...
This paper concentrated on identifying the main issues raised by the adoption of new PV generation and e-cars storage technologies, and their influence on power quality parameters. The main difficulty of this paper was to create a simulation tool which replicates the actual consumption behavior of UPB electric network, and to project scenarios for PV generation and e-cars capacities. A main point...
The organic Rankine cycle (ORC) with subcritical pressures using the waste heat recovered from a low-temperature source was analyzed using an original assumption: to impose the hot source temperature at the outlet of the heat exchanger. This hypothesis leads to a variation of the pinch-point, when the working fluid pressure varies. For the numerical computation, a waste heat source with an inlet temperature...
Monitoring the energy use and other important parameters together with third party applications for data access can provide a strong tool for comparative analysis. Easy data interpretation and data maneuverability can bring sufficient information to improve the energy performance of the building. Web services for building monitoring can easily represent the underlying mechanism for decision-making...
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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