Conceptual and Basic Design of a Stirling Engine Prototype for Electrical Power Generation by Solar Means

2010 ◽  
Author(s):  
Constantino Roldan ◽  
Pedro Pieretti ◽  
Luis Rojas Solorzano
Keyword(s):  
Power Generation ◽  
Solar Radiation ◽  
Heat Exchangers ◽  
Solar Collector ◽  
Electrical Power ◽  
Electric Energy ◽  
Stirling Engine ◽  
Basic Design ◽  
Analysis Methods ◽  
Complex Phenomena

The research consisted in a conceptual and basic design of a prototype Stirling engine with the purpose of taking advantage of the solar radiation to produce electric energy. The work began with a bibliography review covering aspects as history, basic functioning, design configurations, applications and analysis methods, just to continue with the conceptual design, where the prototype specifications are determined. Finally, a basic dimensioning of the important components as heat exchangers (heater, cooler, and regenerator), piston, displacer and solar collector was elaborated. The principal conclusions were that the different analysis methods had dissimilitude between the results, in this sense, a construction of the prototype is necessary for the understanding of the complex phenomena occurring inside the engine.

Maximizing power generation from ambient stray magnetic fields around smart infrastructures enabling self-powered wireless devices

2020 ◽  
Vol 13 (5) ◽  
pp. 1462-1472 ◽  
Author(s):  
Hyeon Lee ◽  
Rammohan Sriramdas ◽  
Prashant Kumar ◽  
Mohan Sanghadasa ◽  
Min Gyu Kang ◽  
...  
Keyword(s):  
Power Generation ◽  
Magnetic Fields ◽  
Energy Conversion ◽  
Electrical Power ◽  
Electric Energy ◽  
Wireless Devices ◽  
Self Powered

A magnetoelectric coupled magneto-mechano-electric energy conversion mechanism allows the generation of high electrical power from ambient stray magnetic fields around infrastructures.

Sensitivity Analysis of a Biomass Fired Stirling Engine Combined Cooling, Heating, and Power System for a Small Office Building

2010 ◽  
Author(s):  
James C. Harrod ◽  
Pedro J. Mago
Keyword(s):  
Power Generation ◽  
Sensitivity Analysis ◽  
Heat Exchangers ◽  
Primary Energy ◽  
Stirling Engine ◽  
Alternative Methods ◽  
Prime Mover ◽  
Operational Cost ◽  
Combined Cooling ◽  
Engine Size

Over the past decade, rising energy demand and cost have created a surge of interest in alternative methods of power generation. As a result, the implementation of combined cooling, heating, and power (CCHP) systems has become a potential candidate for substitution in conventional power generation. The evaluation of a CCHP system must be based on its potential for savings in cost and primary energy reduction. In general, a CCHP system includes several components to satisfy the electric and thermal demands of the facility. These components include the prime mover, heat recovery system, auxiliary boiler, absorption chiller, heating coil unit, and hot water system unit. In practice, the most common prime mover used in CCHP technology is the internal combustion engine, which is limited by low thermal efficiency and poor emissions. Hence, this paper proposes the use of a Stirling engine prime mover that makes use of waste wood chips for fuel. In addition to the standard CCHP components, the Stirling engine houses heat exchangers to aid heat addition and rejection processes. These heat exchangers must be considered along with the other components when analyzing energy requirements. The goal of this study is to determine how the operational characteristics of a constant output biomass-fired Stirling CCHP system are affected by the performance of the individual CCHP system components. The results of this sensitivity analysis are useful in determining the most important parameters to be considered when implementing and designing the system. Results suggest that fuel cost, engine efficiency, engine size, chiller efficiency, and the Stirling engine’s hot side heat exchanger play the most important roles in the CCHP system operational cost. For example, the results show that increasing the engine size leads to increases in primary energy. In addition, an optimum engine size is suggested for cost savings, with smaller and larger engines both leading to increases in operational cost.

scholarly journals Assessing Diagnostic Techniques for Poblem Identification in Advanced Industrial Gas Turbines

1990 ◽  
Author(s):  
Alexander Lifson ◽  
Anthony J. Smalley ◽  
George H. Quentin ◽  
Joseph P. Zanyk
Keyword(s):  
Power Generation ◽  
Electrical Power Generation ◽  
Gas Turbines ◽  
Signal Analysis ◽  
Electrical Power ◽  
Diagnostic Techniques ◽  
Operating Conditions ◽  
Recent Past ◽  
Analysis Methods ◽  
Industrial Gas Turbines

This paper describes existing, developing, and needed methods for detection, identification, and diagnosis of problems in combustion turbines. The use of combustion turbines for electrical power generation is growing, and advanced models of large industrial turbines are now starting to enter service. In view of the harsh operating conditions and severe service to which these new turbines will be exposed, this paper evaluates sensors and signal analysis methods to detect and diagnose the problems which may surface in operation. Generic problems which have been observed in combustion turbine installations in the recent past are identified, and methods for detecting these problems, quantifying them, and isolating their causes are analyzed.

scholarly journals New Concept of Power Generation Using TEGs: Thermal Modeling, Parametric Analysis, and Case Study

Entropy ◽  
2020 ◽  
Vol 22 (5) ◽  
pp. 503
Author(s):  
Ahmad Faraj ◽  
Hassan Jaber ◽  
Khaled Chahine ◽  
Jalal Faraj ◽  
Mohamad Ramadan ◽  
...  
Keyword(s):  
Power Generation ◽  
Solar Radiation ◽  
Parametric Analysis ◽  
Thermal Modeling ◽  
Electrical Power ◽  
Steady State Solution ◽  
Heat Diffusion ◽  
Heat Diffusion Equation ◽  
Practical Applications ◽  
Innovative Concept

In this manuscript, an innovative concept of producing power from a thermoelectric generator (TEG) is evaluated. This concept takes advantage of using the exhaust airflow of all-air heating, ventilating, and air-conditioning (HVAC) systems, and sun irradiation. For the first step, a parametric analysis of power generation from TEGs for different practical configurations is performed. Based on the results of the parametric analysis, recommendations associated with practical applications are presented. Therefore, a one-dimensional steady-state solution for the heat diffusion equation is considered with various boundary conditions (representing applied configurations). It is revealed that the most promising configuration corresponds to the TEG module exposed to a hot fluid at one face and a cold fluid at the other face. Then, based on the parametric analysis, the innovative concept is recognized and analyzed using appropriate thermal modeling. It is shown that for solar radiation of 2000 W/m2 and a space cooling load of 20 kW, a 40 × 40 cm2 flat plate is capable of generating 3.8 W of electrical power. Finally, an economic study shows that this system saves about $6 monthly with a 3-year payback period at 2000 W/m2 solar radiation. Environmentally, the system is also capable of reducing about 1 ton of CO2 emissions yearly.

scholarly journals Development and investigation of solar collectors for conversion of solar radiation into heat and/or electricity

2006 ◽  
Vol 10 (4) ◽  
pp. 177-187 ◽  
Author(s):  
Velimir Stefanovic ◽  
Milorad Bojic
Keyword(s):  
Solar Radiation ◽  
Solar Collector ◽  
Electric Energy ◽  
District Heating ◽  
Solar Collectors ◽  
Significant Saving ◽  
Photovoltaic Panel ◽  
Middle Temperature ◽  
Set Up ◽  
Two Hybrid

This article describes work on two projects of the National Energy Efficiency Program NEEP 709300036 and NPEE 271003 titled "The model of solar collector for middle temperature conversion of solar radiation in heat" and "Development and investigation on hybrid solar collector for heat and electricity generation", respectively. This first project deals with solar collector that transfers solar radiation in heat in area of middle temperature conversion (at temperatures above 100 ?C). During entire year it can realize significant saving of electric energy used for preparation of warm water and in central and district heating. During work on the second project, two hybrid solar collectors, their installation, mathematical model, software, and experimental set-up were designed and realized. The first collector had the photovoltaic panel located above the absorber and the second collector had the panel located on the absorber. For both collectors, the results show that efficiency of fossil fuel replacement is 85%. .

Variable-Frequency Prony Method in the Analysis of Electrical Power Quality

2012 ◽  
Vol 19 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Jarosław Zygarlicki ◽  
Janusz Mroczka
Keyword(s):  
Least Squares ◽  
Power Quality ◽  
Electrical Power ◽  
Electric Energy ◽  
Variable Frequency ◽  
Prony Method ◽  
Analysis Window ◽  
Proposed Modification ◽  
Selection Of

Variable-Frequency Prony Method in the Analysis of Electrical Power QualityThe article presents a new modification of the the least squares Prony method. The so-called variable-frequency Prony method can be a useful tool for estimating parameters of sinusoidal components, which, in the analyzed signal, are characterized by time-dependent frequencies. The authors propose use of the presented method for testing the quality of electric energy. It allows observation of phenomena which, when using traditional methods, are averaged in the analysis window. The proposed modification of least squares Prony method is based on introduction and specific selection of a frequency matrix. This matrix represents frequencies of estimated components and their variability in time.

Sign in / Sign up

Export Citation Format

Share Document