Energy Analysis Articles & Analysis

Rural energy planning is characterised by matching, as far as possible, the available local energy supply with various energy end-uses. For this matching, decision-makers have to consider several issues, such as cost, technology, sustainability and equity. These objectives are conflicting and, therefore, it is difficult to find an optimised solution. Therefore, such problems should be analysed by ...

By Inderscience Publishers

This paper presents a consistent EU energy and energy related emissions outlook for the period to 2030. The baseline scenario for the EU was developed using the PRIMES model. The first section presents the key energy features of the baseline outlook of the European energy system. The second section deals with the role of technology progress in the demand and the supply side. Emphasis is given to ...

By Inderscience Publishers

Energy analysis of a production unit helps to quantify the energy consumed at different stages, thus providing estimates of energy and material wastage, if any. From the general principles of energy analysis involving mass conversion efficiencies and the energy inputs at various stages of the production process of a motorcycle producing industry, namely Honda Motorcycle and Scooter India Pvt. ...

By Inderscience Publishers

Using Building Information Modelling for energy analysis can save a company a significant amount of time and money, reports ...

By Vital Energi

The temperature-dependent viscosity effect on forced convection in a circular tube filled with a porous medium is investigated theoretically. The Darcy flow model is employed and the viscosity-temperature behaviour is described by an inverse-linear model. It is found that the effect of the variation impacts the Nusselt number significantly while the pressure drop was not influenced that much. ...

By Inderscience Publishers

We have performed analytical and limited numerical analyses for fully developed forced convection and entropy generation in a fluid-saturated porous medium channel bounded by two parallel plates of finite thickness. The full problem is treated as a conjugate heat transfer problem. The Darcy-Brinkman momentum equation is used to model the flow through the porous media. The outer surfaces of the ...

By Inderscience Publishers

In this investigation, the energy and exergy analyses are carried out in a Lister 8.1 IDI diesel engine for different loads (25%, 50%, 75% and full loads operation) at maximum torque engine speed (730 rpm). The energy analysis is done during a closed cycle using of a three dimensional CFD code. The results by this model for the pressure in cylinder at 50% and full load operations are compared ...

By Inderscience Publishers

This study presents the afterburning effect on energetic and exergetic performance of an experimental turbojet engine (TJE) used on military aircrafts. Energy losses and exergy consumptions are investigated to determine thermodynamic inefficiencies at military (MIL) and afterburner (AB) operation modes. Results of this study point out that the AB operation mode decreases the energy and exergy ...

By Inderscience Publishers

Economic and environmental considerations dictate the need for improved fuel utilisation in thermal power stations. To meet this goal, a design project was undertaken to assess the suitability for Combined Cycle application of different Gas Turbine (GT) cycles: Simple, Intercooled, Reheated, Intercooled/Reheated, Intercooled/Reheated/Regenerative cycle. Comparative figures for efficiency and ...

By Inderscience Publishers

Thermodynamic analysis, including energy and exergy, was applied for studying a chimney phenomenon. The mathematical model of a chimney was derived and used for evaluation of output trends responsive to change of some input parameters. It was proposed to use chimney efficiency as a measure of waste heat recovery. Also, the new component of exergy of the substance, called mechanical exergy, was ...

By Inderscience Publishers

The objective of this study is to determine the actual energy losses by performing energy and exergy analyses and to evaluate energy and exergy efficiency in each process for the cement factory. In these analyses, for each process energy and exergy diagrams have been constituted on the production line. Efficiencies (energy/exergetic) of the processes for the raw mill, the rotary kiln, the trass ...

By Inderscience Publishers

This study presents a review on energy and exergy analysis of Otto and Diesel engines. Calculation methods of the analysis are discussed in detail. Previous studies, from 1963 to 2008, are chronologically listed and studied. The test engines had different cylinder numbers, speeds and rated powers. Engine specifications and test bench schematics are given in tables and figures. The best exergetic ...

By Inderscience Publishers

In this study, where the actual plant operational data were utilised, the energy and exergy analyses of a sulphation unit in a powder detergent plant with a production rate of 4400 kg /h, located in Izmir, were performed. The energy and exergy losses were determined in four components of the sulphation unit and the overall energy and exergy efficiencies were calculated as 73 and 56%, ...

By Inderscience Publishers

In this study, energy and exergy analysis are applied to the experimental data of an internal combustion engine operating on the conventional Otto cycle. The data are collected using an engine test unit which enables accurate measurements of fuel flow rate, combustion air flow rate, engine load, engine speed and all the relevant temperatures. Energy and exergy efficiencies are calculated for ...

By Inderscience Publishers

Adiabatic availability, a property, is defined as the largest work that can be done by a system in an adiabatic, constant mass and volume process; therefore it is a more inclusive concept that includes all other definitions of maximum work. Adiabatic availability of all systems at any state is larger than or equal to zero. Adiabatic availability of a system in thermodynamic equilibrium state is ...

By Inderscience Publishers

This paper presents energy and exergy analyses as a useful concept in analysing true efficient energy utilisation of the Nigerian residential sector by considering energy and exergy flows in this sector for a period of 15 years from 1991 to 2005. The energy and exergy flows considered include the commercial and the 'non-commercial' energy sources. The most efficiently utilised energy source ...

By Inderscience Publishers

The pot hardware in continuous galvanising lines is prone to failure and needs to be replaced quite frequently which results in considerable loss of production time and high energy consumption. Galvanizing Energy Profiler and Decision Support Systems (GEPDSS) was developed to consider major energy consuming equipment in a typical hot dip continuous line which tracks the current production and ...

By Inderscience Publishers

It is necessary to understand the mechanisms that have enabled improvements of performance parameters such as thermodynamics efficiencies, thrust or power, specific fuel consumption and specific power in aero engines, thus reducing environmental impact. In this study, a thermodynamic analysis of a turboprop engine is performed at full and partial load conditions. The maximum overall and exergy ...

By Inderscience Publishers

An optimisation of the exergy flows in buildings and the supply structures related to them, similar to other thermodynamic systems, can help in identifying the potential of increased efficiency in energy utilisation. The low exergy (LowEx) approach entails matching the quality levels of exergy supply and demand to streamline the utilisation of high–value energy resources. This approach is the key ...

By Inderscience Publishers

In this paper, the performance of an internal combustion engine is evaluated at the steady-state condition by application of energy and exergy analysis using the experimental test results. The energy and exergy balances are calculated at different engine speeds. The results show that the heat rejection of energy and exergy flow increases with increasing engine speed. The exergy efficiencies are ...

By Inderscience Publishers