Steam engine characteristics and theoretical performance

Prasad, Surendra B.

doi:10.1016/0196-8904(93)90129-x

Cited by 11 publications

(10 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…show the power curves for different inlet pressures of the engine. The optimum supply pressure lies around 30 bars that has been confirmed by previous Prasad[7]. Pressures above this range will have a negative effect which is explained by a close analysis of the Molier diagram for water.…”

supporting

confidence: 70%

“…In addition, the ability to cater to fluctuating torque and velocity conditions of the reciprocating cycle makes it the preferred device for automotive applications. Nevertheless, if the energy developed in a turbine is converted into electricity and used to drive an electric motor it leads to a practical solution for hybrid vehicles [7]. An intermediate solution is the Wankel rotary expander [8].…”

Section: Rankine Cycle With a Reciprocating Expander A Reciprocatingmentioning

confidence: 99%

See 1 more Smart Citation

Small Engines as Bottoming Cycle Steam Expanders for Internal Combustion Engines

Weerasinghe

Hounsham

2017

Journal of Combustion

View full text Add to dashboard Cite

Heat recovery bottoming cycles for internal combustion engines have opened new avenues for research into small steam expanders (Stobart and Weerasinghe, 2006). Dependable data for small steam expanders will allow us to predict their suitability as bottoming cycle engines and the fuel economy achieved by using them as bottoming cycles. Present paper is based on results of experiments carried out on small scale Wankel and two-stroke reciprocating engines as air expanders and as steam expanders. A test facility developed at Sussex used for measurements is comprised of a torque, power and speed measurements, electronic actuation of valves, synchronized data acquisition of pressure, and temperatures of steam and inside of the engines for steam and internal combustion cycles. Results are presented for four engine modes, namely, reciprocating engine in uniflow steam expansion mode and air expansion mode and rotary Wankel engine in steam expansion mode and air expansion mode. The air tests will provide base data for friction and motoring effects whereas steam tests will tell how effective the engines will be in this mode. Results for power, torque, and p-V diagrams are compared to determine the change in performance from air expansion mode to steam expansion mode.

show abstract

supporting

confidence: 70%

Section: Rankine Cycle With a Reciprocating Expander A Reciprocatingmentioning

confidence: 99%

Small Engines as Bottoming Cycle Steam Expanders for Internal Combustion Engines

Weerasinghe

Hounsham

2017

Journal of Combustion

View full text Add to dashboard Cite

show abstract

“…In general, this issue requires apparatuses that are not easily down scalable (eg, ORC, steam turbines) or have a very low conversion efficiency (eg, steam engines). 4 Recent developments of the Stirling engine (SE), 5 in particular in the free-piston configuration, allow to design biomass cogeneration systems even at a scale lower than 10 kW e . Although coupling a biomass burner with a Stirling engine was already attempted in the past, reliable operation has been hardly achieved.…”

Section: Introductionmentioning

confidence: 99%

“…Although small biomass burners (up to 100 kW t ) have large diffusion for residential heating, cooking and small industrial applications, cogeneration of electricity along with heat in such equipment is difficult because of technological and economic barriers. In general, this issue requires apparatuses that are not easily down scalable (eg, ORC, steam turbines) or have a very low conversion efficiency (eg, steam engines) 4 . Recent developments of the Stirling engine (SE), 5 in particular in the free‐piston configuration, allow to design biomass cogeneration systems even at a scale lower than 10 kW e .…”

Section: Introductionmentioning

confidence: 99%

Coupling a Stirling engine with a fluidized bed combustor for biomass

et al. 2020

View full text Add to dashboard Cite

The paper deals with the integration between a kinematic Stirling engine and a fluidized bed combustor for micro-scale cogeneration of renewable energy. A pilot-scale facility integrating a 40 kW t combustor and a γ-type Stirling engine (0.5 kW e) was set up and tested to demonstrate the feasibility of this solution. The Stirling engine was installed at a lateral wall of the combustor in direct contact with the fluidized bed region. An experimental campaign was executed to assess the performance of the innovative integrated system. The experimental results can be summarized in: (a) very high combustion efficiency with biomass feeding, (b) elevated heat transfer rate to the engine, (c) a relatively small share (about 2 kW t) transferred to the engine from the thermal power generated by the combustor (around 13 kW t), (d) conversion to electric power close to the upper limit of the engine, (e) limited impact of the Stirling engine on the fluidized bed behavior, for example, temperature. From the analysis of measured variables, the dynamics is dominated by the fast response of the Stirling engine, which rapidly reacts to the slow changes of the fluidized bed combustor regime: the dynamic response of the tested facility as a thermal system was slow, the time constant being of the order of 10 minutes.

show abstract

“…Conversely, the option to use vegetable, pyrolysis, or used oils as they are in a conventional oil burner would simplify the route for producing energy in small decentralized plants. In this context and under certain conditions (ie, scale lower than 50 kW el ) SEs are optimal candidates to convert the heat generated from fuel combustion into power, 17 being more efficient as compared to other devices (eg, Rankine machines 28 or microturbine and Organic Rankine Cycle 29 ).…”

Section: Introductionmentioning

confidence: 99%

Development of an experimental test rig for cogeneration based on a Stirling engine and a biofuel burner

et al. 2020

View full text Add to dashboard Cite

A system consisting of a last-generation Stirling engine (SE) and a fuel burner for distributed power generation has been developed and experimentally investigated. The heat generated by the combustion of two liquid fuels, a standard Diesel fuel and a rapeseed oil, is used as a heat source for the SE, that converts part of the thermal energy into mechanical and then electric energy. The hot head of the SE is kept in direct contact with the flame generated by the burner. The burner operating parameters, designed for Diesel fuel, were changed to make it possible to burn vegetable oils, not suitable for internal combustion engines. The possibility of adopting different configurations of the combustion chamber was taken into account to increase the system efficiency. The preliminary configurations adopted allowed to operate this integrated system, obtaining an electric power up to 4.4 kW el with a net efficiency of 11.6%.

show abstract

Steam engine characteristics and theoretical performance

Cited by 11 publications

References 2 publications

Small Engines as Bottoming Cycle Steam Expanders for Internal Combustion Engines

Small Engines as Bottoming Cycle Steam Expanders for Internal Combustion Engines

Coupling a Stirling engine with a fluidized bed combustor for biomass

Development of an experimental test rig for cogeneration based on a Stirling engine and a biofuel burner

Contact Info

Product

Resources

About