Piston Engine–Based Power Plants

2014 ◽  
pp. 93-110
Author(s):  
Paul Breeze
Keyword(s):  
Power Plants ◽  
Piston Engine

New Free-Piston Topping Cycle for Gas-Turbine Power Plants

2003 ◽  
Author(s):  
William L. Kopko ◽  
John S. Hoffman
Keyword(s):  
High Performance ◽  
Power Plants ◽  
Waste Heat ◽  
Combustion Engine ◽  
Complete Recovery ◽  
Combined Cycle ◽  
Piston Engine ◽  
Free Piston ◽  
Free Piston Engine ◽  
Topping Cycle

A proposed topping cycle inserts a free-piston internal-combustion engine between the compressor and the combustor of a combustion turbine. The topping cycle diverts air from the compressor to supercharge the free-piston engine. Because the free-piston engine uses gas bearings to support the piston and is built of high-temperature materials, the engine can increase the pressure and temperature of the gas, exhausting it to a small expander that produces power. The exhaust from the topping-cycle expander is at a pressure that can be re-introduced to the main turbine, allowing almost complete recovery of waste heat. A capacity increase exceeding 35% is possible, and overall cycle efficiency can approach 70% when incorporated into a state-of-the-art combined-cycle plant. The cost of per incremental kW of the topping cycle can be dramatically lower than that of the base turbine because of the high power density and simplicity of the engine. Building on decades of progress in combustion turbines systems, the new cycle promises high performance without the engineering risks of manufacturing a completely new cycle.

scholarly journals RESEARCH OF ROTARY PISTON ENGINE USE IN TRANSPORT POWER PLANTS

2021 ◽  
Vol 16 (1) ◽  
pp. 165-178
Author(s):  
Oleksandr MYTROFANOV ◽  
Arkadii PROSKURIN ◽  
Andrii POZNANSKYI
Keyword(s):  
Power Plants ◽  
Piston Engine

scholarly journals METHODS OF STRUCTURAL AND PARAMETRIC SYNTHESIS OF COMBINED GENERATOR OF RECIPROCATING POWER PLANTS FOR ROBOTIC SYSTEMS ON THE BASIS OF A FREE PISTON ENGINE

2018 ◽  
Vol 63 (2) ◽  
pp. 229-243
Author(s):  
A. B. Menzhinsky ◽  
A. N. Malashin
Keyword(s):  
Power Plant ◽  
Specific Gravity ◽  
Power Plants ◽  
Robotic Systems ◽  
Piston Engine ◽  
Free Piston ◽  
Parametric Synthesis ◽  
Free Piston Engine ◽  
Electromechanical Energy ◽  
Combined Generator

Power supply system of advanced robotic systems requires the development of electromechanical energy converters with high energy and minimum weight and overall dimensions. In this regard, a free piston engine with an electric generator is considered as a promising plant.Interest in the study of power plants based on free piston engines is caused by several advantages compared to conventional internal combustion engines with a crank mechanism: relative simplicity of the design, 40 % fewer elements, which reduces the overall capacity, specific gravity and metal content of the free piston engine in 2.5–3 times. In addition, the fuel consumption is 30 % lower. Also an important design advantage of power plants based on free piston engines is a relatively simple modular construction. Reciprocating electric generators with transverse increment of the magnetic flux are the most commonly used ones in currently developed power plants based on free piston engines of foreign countries (USA, Russia, Germany, China, UK, Japan, Sweden, Israel, etc.) as the electrical AC machines. The main disadvantage of this type of generators are the absence of coordination of electrical and mechanical subsystems of the power plant at the extreme points of the operating cycle, which limits the efficiency of the free piston engine and reduces the reliability of the power plant.To solve this problem it is proposed to use Electromechanical energy Converter with transverse and longitudinal increment of the magnetic flux (combo generator). However, currently there is no scientifically valid method of synthesis of this type of generator. To address this problem we have developed the methodology of structural and parametric synthesis of combined generator of the reciprocating type for a plant on the basis of free piston engine, which is based on the use of the specific gravity of the combined generator as the objective function. It allows synthesizing electric machine of the reciprocating type with the specified efficiency and minimum specific mass. 

scholarly journals Design of Heat Exchanger for Ericsson-Brayton Piston Engine

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Peter Durcansky ◽  
Stefan Papucik ◽  
Jozef Jandacka ◽  
Michal Holubcik ◽  
Radovan Nosek
Keyword(s):  
Power Plants ◽  
Fossil Fuels ◽  
Primary Energy ◽  
Flue Gases ◽  
Electricity Production ◽  
Piston Engine ◽  
Hot Air ◽  
Effective Technology ◽  
External Combustion ◽  
Overall Effectiveness

Combined power generation or cogeneration is a highly effective technology that produces heat and electricity in one device more efficiently than separate production. Overall effectiveness is growing by use of combined technologies of energy extraction, taking heat from flue gases and coolants of machines. Another problem is the dependence of such devices on fossil fuels as fuel. For the combustion turbine is mostly used as fuel natural gas, kerosene and as fuel for heating power plants is mostly used coal. It is therefore necessary to seek for compensation today, which confirms the assumption in the future. At first glance, the obvious efforts are to restrict the use of largely oil and change the type of energy used in transport. Another significant change is the increase in renewable energy—energy that is produced from renewable sources. Among machines gaining energy by unconventional way belong mainly the steam engine, Stirling engine, and Ericsson engine. In these machines, the energy is obtained by external combustion and engine performs work in a medium that receives and transmits energy from combustion or flue gases indirectly. The paper deals with the principle of hot-air engines, and their use in combined heat and electricity production from biomass and with heat exchangers as primary energy transforming element.

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