scholarly journals Operational and economic analysis of a Velox-type combined heat & power plant with a throttle valve

2021 ◽  
Vol 345 ◽  
pp. 00028
Author(s):  
Krystian Smołka ◽  
Piotr Wiśniewski ◽  
Mirosław Majkut ◽  
Sławomir Dykas
Keyword(s):  
Power Plant ◽  
Economic Analysis ◽  
Low Power ◽  
Thermal Power ◽  
Steam Superheater ◽  
Power Engineering ◽  
Water Fraction ◽  
Throttle Valve ◽  
Gas Power Plant ◽  
Small Capacity

For many years, the Department of Power Engineering and Turbomachinery of the Silesian University of Technology has been using a small-capacity (about 500 kWe) steam-gas power plant. Based on many years of experience in operation of this power plant utilizing the Velox-type gas-steam system, an idea arose to modify this type of thermal power cycle to create a combined heat and power (CHP) plant of small capacity, dedicated for distributed heat and power production or production process steam with high temperature. Previous thermodynamic and economic analysis of that type of low-power CHP plant confirmed many advantages of using this type of solution in low-power engineering. The new idea is to add a throttle valve between the economizer and the evaporator for the reference cycle of the gas-steam Velox-type CHP plant. It was further assumed that water would partially be vaporized on the valve. This paper presents a thermodynamic and economic analysis of this type of a system with an added throttle valve. Downstream the valve, the evaporated water fraction is fed directly into the steam superheater. It is determined how such a retrofit affects the system thermodynamic and economic characteristics. The system is modelled in the EBSILON® Professional 14 software.

scholarly journals The analysis of a Velox-type CHP plant for various gaseous fuels

2019 ◽  
Vol 137 ◽  
pp. 01001
Author(s):  
Krystian Smolka ◽  
Slawomir Dykas
Keyword(s):  
Power Plant ◽  
Waste Heat ◽  
Thermal Power ◽  
Combined Heat And Power ◽  
Power Cycle ◽  
Gaseous Fuels ◽  
University Of Technology ◽  
Gas Power Plant ◽  
Steam System ◽  
Small Capacity

For many years, the Institute of Power Engineering and Turbomachinery of the Silesian University of Technology has been using a small-capacity (about 500 kWe) steam-gas power plant. Based on many yearsof experience in operation of this power plant utilizing the Velox-type gas-steam system, an idea arose to modify this type of thermal power cycle to create a combined heat and power (CHP) plant of small capacity, dedicated for distributed heat and power production of the range up to 500 kW or production process steam with high temperature. Previous thermodynamic and economic analysis of that type of CHP plant were conducted for natural gas as afuel. The new idea is use the alternative gas fuels or waste heat for Velox-type CHP plant. An adaptation of the Velox-type CHP plant for various fuelscan be done in simple way by moving the combustion chamber out from the setof heat exchangers, in similar way as it is done for HRSG. This paper presents a thermodynamic analysis of the Velox-type steam-gas cycle fired with various alternative gas fuels such as coke gas, blast furnace gas, biogas orgas from gasification. The systems are modelled in the EBSILON® Professional 13 program.

scholarly journals Expediency of using the method of thermochemical regeneration at the reconstruction of a gas thermal power plant

2020 ◽  
Vol 2020 (3) ◽  
pp. 53-57
Author(s):  
I.V. Antonets ◽  
Keyword(s):  
Power Plant ◽  
Natural Gas ◽  
Gas Turbine ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Calorific Value ◽  
Combustion Products ◽  
Steam Superheater ◽  
Working Fluid ◽  
Gas Power Plant

The article is devoted to finding ways for the improvement of technical, economic and environmental characteristics of an existing gas thermal power plant (TPP). One of such ways is the use of thermochemical regeneration (TCR) technology. Thermochemical regeneration is the technology of utilization of the waste-gas heat, which lies in the conversion of fuel due to this heat, as a result of which a new fuel with a significantly higher calorific value is formed. In addition, this fuel contains a significant amount of hydrogen, the combustion of which is accompanied by lower NOx emissions as compared with, for example, natural gas. Thus, TCR enables one to solve simultaneously environmental problems (at least in part). When using this technology, there is a problem of finding a heat source to implement the conversion process. It is shown that the replacement of intermediate steam superheater by thermochemical reactor reduces the efficiency of power plant as a whole. Therefore, we analyze the variant of gas-turbine superstructure over the TPP. Two schemes of the realization of TCR with steam-gas power plant (SGP) are considered: a scheme with the use of air excess for decreasing the temperature of working body before the gas turbine (α > 1) and a scheme with ballast in the form of combustion products. Calculations show that the presence of oxygen in the reagent of conversion significantly reduces its degree, which makes such schemes inefficient, and the use of combustion products as ballast to reduce the temperature of working fluid before the gas turbine gives an increase in efficiency of 3.6% (rel.) as compared with conventional SGP. It is established that the introduction of scheme with ballast in the form of combustion products will save 2790 nm3 / h of natural gas. Keywords: thermal power industry, thermochemical regeneration, steam-gas power plant

Mechanical behaviour of material of thermal power plant steam superheater collector after exploitation

2013 ◽  
Vol 27 ◽  
pp. 262-271 ◽  
Author(s):  
O. Yasniy ◽  
T. Vuherer ◽  
V. Yasniy ◽  
A. Sobchak ◽  
A. Sorochak
Keyword(s):  
Power Plant ◽  
Mechanical Behaviour ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Steam Superheater

scholarly journals THERMOACOUSTIC ENGINE AS A LOW-POWER COGENERATION ENERGY SOURCE FOR AUTONOMOUS CONSUMER POWER SUPPLY

2021 ◽  
Vol 18 (2) ◽  
pp. 60-66
Author(s):  
A.D. Mekhtiyev ◽  
Keyword(s):  
Power Plant ◽  
Low Power ◽  
Power Supply ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Saturated Steam ◽  
Working Fluid ◽  
Thermoacoustic Engine ◽  
Basic Principles

The article deals with the issue of using a thermoacoustic engine as a low-power cogeneration source of energy for autonomous consumer power supply capable of operating on various types of fuel and wastes subject to combustion. The analysis of the world achievements in this field of energy has been carried out. A number of advantages make it very promising for developing energy sources capable of complex production of electrical and thermal energy with a greater efficiency than that of present day thermal power plants. The proposed scheme of a thermal power plant is based on the principle of a Stirling engine, but it uses the most efficient and promising thermoacoustic converter of heat into mechanical vibrations, which are then converted into electric current. The article contains a mathematical apparatus that explains the basic principles of the developed thermoacoustic engine. To determine the main parameters of the thermoacoustic engine, the methods of computer modeling in the DeltaEC environment have been used. A layout diagram of the laboratory sample of a thermal power plant has been proposed and the description of its design has been given. It has been proposed to use dry saturated steam as the working fluid, which makes it possible to increase the generated power of the thermoacoustic engine.

WATER-STORAGE POWER STATION PLANTS OF LOW POWER

2016 ◽  
Vol 6 (1) ◽  
pp. 21-26
Author(s):  
Muradulla Mukhammadievich MUKHAMMADIEV ◽  
Boborakhim Urishevich URISHEV ◽  
Kurbon Salikhdzhanovich DZHURAEV ◽  
Jamol Makhmud ugli MAHMUDOV
Keyword(s):  
Power Plant ◽  
Low Power ◽  
Water Storage ◽  
Compressed Air ◽  
Power Station ◽  
Basic Parameters ◽  
Energy Of Interaction ◽  
Pumped Storage ◽  
Air Lift ◽  
Small Capacity

The technique of determining the basic parameters of the new water-lifting devices used in the composition of the pumped storage power plant of small capacity. Show the results of calculations by this technique for a pumped storage power plant of 10 kW. The results of calculations of the jet device and air-lift installation designed to work in PSP, showed the suitability of the proposed methodology that can be used in the design of hydropower facilities operating with a water-lifting devices using the energy of interaction between water and compressed air.

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