scholarly journals Analysis of 100 kW ocean thermal power plant with butene as working fluid

2019 ◽  
Vol 339 ◽  
pp. 012039
Author(s):  
B Halimi ◽  
R Y Atolah
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Working Fluid

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.

Analysis of a New Thermodynamic Cycle for Combined Power and Cooling Using Low and Mid Temperature Solar Collectors

1999 ◽  
Vol 121 (2) ◽  
pp. 91-97 ◽  
Author(s):  
D. Yogi Goswami ◽  
Feng Xu
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Solar Thermal ◽  
Boiling Temperature ◽  
Working Fluid ◽  
Water Mixture ◽  
Ammonia Vapor ◽  
Ammonia Water ◽  
Solar Thermal Power

A combined thermal power and cooling cycle is proposed which combines the Rankine and absorption refrigeration cycles. It can provide power output as well as refrigeration with power generation as a primary goal. Ammonia-water mixture is used as a working fluid. The boiling temperature of the ammonia-water mixture increases as the boiling process proceeds until all liquid is vaporized, so that a better thermal match is obtained in the boiler. The proposed cycle takes advantage of the low boiling temperature of ammonia vapor so that it can be expanded to a low temperature while it is still in a vapor state or a high quality two phase state. This cycle is ideally suited for solar thermal power using low cost concentrating collectors, with the potential to reduce the capital cost of a solar thermal power plant. The cycle can also be used as a bottoming cycle for any thermal power plant. This paper presents a parametric analysis of the proposed cycle.

Design of a 200 kWe Solar Thermal Power Plant for Ontario

2008 ◽  
Author(s):  
Thomas A. Cooper ◽  
James S. Wallace
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Solar Collector ◽  
Thermal Power ◽  
Solar Thermal ◽  
Working Fluid ◽  
Small Scale ◽  
Computer Simulation Model ◽  
Night Time ◽  
Solar Thermal Power

A preliminary design and feasibility study has been conducted for a 200 kWe solar thermal power plant for operation in Ontario. The objective of this study is to assess the feasibility of small-scale commercial solar thermal power production in areas of relatively low insolation. The design has been developed for a convention centre site in Toronto, Ontario. The plant utilizes a portion of the large flat roof area of the convention centre to accommodate the collector array. Each power plant module provides a constant electrical output of 200 kWe throughout the year. The system is capable of maintaining the constant output during periods of low insolation, including night-time hours and cloudy periods, through a combination of thermal storage and a supplemental natural gas heat source. The powerplant utilized the organic Ranking cycle (ORC) to allow for relatively low source temperatures from the solar collector array. A computer simulation model was developed to determine the performance of the system year-round using the utilizability-solar fraction method. The ORC powerplant uses R245fa as the working fluid and operates at an overall efficiency of 11.1%. The collector is a non-concentrating evacuated tube type and operates at a temperature of 90°C with an average annual efficiency of 23.9%. The system is capable of achieving annual solar fractions of 0.686 to 0.874 with collector array areas ranging from 30 000 to 40 000 m2 and storage tank sizes ranging from 3.8 to 10 × 106L respectively. The lowest possible cost of producing electricity from the system is $0.393 CAD/kWh. The results of the study suggest that small-scale solar thermal plants are physically viable for year round operation in Ontario. The proposed system may be economically feasible given Ontario’s fixed purchase price of $0.42 CAD/kWh, but the cost of producing electricity from the system is highly dependent on the price of the solar collector.

Analysis of Current State and Integrity Evaluation for the Supply Tank of Generation Unit 6 of Thermal Power Plant Nikola Tesla ”A”, Obrenovac

2014 ◽  
Vol 1029 ◽  
pp. 14-19
Author(s):  
Miodrag Arsić ◽  
Srđan Bošnjak ◽  
Vencislav Grabulov ◽  
Aleksandar Veljović ◽  
Zoran Savić
Keyword(s):  
Power Plant ◽  
Welded Joints ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Working Fluid ◽  
Operating Pressure ◽  
Supply Tank ◽  
Welded Structure ◽  
Nikola Tesla ◽  
Generation Unit

Stable supply tank, with volume V = 250 m3 and operating pressure p = 1,5 MPa, of generation unit 6 at thermal power plant 'Nikola Tesla A' in Obrenovac, is designed for water-steam working fluid. It was made of steel Č 1204 as a single-part welded structure with a single wall. Cylindrical tank shell consists of 8 segments, while torispherical deep bottoms consist of 3 segments. The tank is in the horizontal position and it lays on 4 supports. There are five manometers installed at the tank for pressure control, as well as 5 spring-loaded safety valves. In this paper results of non-destructive tests performed on the tank are presented. Mechanical damages on parent material, up to 1.5 mm deep, were detected at the outer surface of the cylindrical section of the right bottom (as seen from the boiler) and on the inner surface of the shell, as well as sporadic pitting corrosion, up to 0.5 mm deep, and 2 mm misalignment of sheet metals in areas where shell segments are joined. Crack type linear indications were detected on the surface of welded joints through the use of magnetic particle testing. Through ultrasonic and radiographic testing it was determined that the homogeneity of welded joints is satisfactory. Hardness testing was performed on all segments of the tank, and obtained values were in the range between 118 and 130 HB. Metallographic examination, performed on specimens of all segments of the tank, showed that microstructure of material is either fine-grained or striped ferrite-pearlite. On the basis of test results the repair technology for shell and bottom segments was made, while on the basis of the analytical calculation of tank strength the integrity evaluation was carried out for the upcoming period of service, depending on the category of the vessel.

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

scholarly journals Condenser Heat Recovery For Combined Cooling-Heating and Power Generation using Isentropic Fluid

2017 ◽  
Vol 2 (6) ◽  
pp. 18
Author(s):  
Kaushalendra Kumar Dubey ◽  
R. S. Mishra
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Thermal Efficiency ◽  
Thermal Power Plant ◽  
Heat Recovery ◽  
Thermal Power ◽  
Integrated System ◽  
Working Fluid ◽  
Cooling Effects ◽  
Combined Cooling

The thermodynamic study of combined cooling, heating and power generation system with the recovery of heat source from the condenser of 1MW thermal power plant. The R-134a working fluid based Organic Rankine Cycle (ORC) is introduced in the proposed thermodynamic analysis and the provision of parabolic trough collector is recommended for solar heating purpose. The analysis of the system shows thermal efficiency and multiple effects like Heating- Cooling and Power through heat recovery of thermal power plant. This analysis also express the resulting process heat obtained and the cooling effect of solar integrated as well as non-solar integrated system. The results conclude that the thermal efficiency as well as heating-power and cooling effects increases by 30-40% in the case of solar integrated as compare to without solar system.

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