Energy Management Articles
-
Design of method and mechanism for geothermal energy extraction
By drilling using a specially designed hydride carbide (melting point: 1,365°C) drill, we can drill the earth's crust to about 5 to 40 km to reach temperatures of 700 to 1,000°C, with minimum cost of the drill and drilling technology. Further, we can extract energy by pouring in water on an inserted carbide alloy vessel into the drilled well and bringing out as steam to drive the turbines. By ...
-
RELAP5–3D transient modelling for NGNP integrated plant
The High–Temperature Gas–cooled Reactor (HTGR) is designed with outlet temperatures ranging between 750°C and 800°C. These high outlet temperatures enhance the power production efficiency and facilitate a variety of industrial applications. The objective of this study is to understand the response of the primary system to potential transients in the secondary system. For this analysis, the ...
-
A computational set of tools developed for fluence calculation as support for BWR's surveillance programme
The determination of a neutron source for the RPV fluence calculation is a key factor to detect and prevent degradation of safety–related structures of a NPP. A 3D neutron fluence calculation can be very challenging if all the source details are considered. Several options are possible in order to address the problem, being the most direct the use of 3D transport codes; however, strategies that ...
-
How To Prolong The Life Of Your Boiler
Regularly boiler maintenance will prolong the life of your boiler and improve efficiency, saving you money. Over the years sludge can build up within the system making it work harder, causing it to be inefficient and expensive to keep. A planned maintenance will flush the system, removing the sludge and other deposits, your gas engineer will also treat the boiler. Flushing a new system will also ...
-
Thermodynamic analysis of an integrated gasification combined cycle power plant: effect of nitrogen supply on system performance
A comprehensive thermodynamic analysis of a conceptual integrated coal gasification combined cycle power plant is presented. Energy and exergy efficiencies and exergy destructions of each sub–unit are calculated. The effect of nitrogen, which is supplied from the Air Separation Unit (ASU) of the gasification unit to the combustion chamber of the gas turbine (GT) cycle, on system performance is ...
-
Energetic and exergetic performance evaluation of improved biomass cookstoves
This paper deals with thermal and exergy efficiencies of single–pot and double–pot improved cookstoves. These cookstoves are essentially made of cement and bricks and have at least five years of useful life. The cookstoves were tested with Acacia nilotica wood. Thermal and exergy efficiencies of the single–pot improved cookstove were estimated at 20.36%, and 8.10%, respectively, whereas for the ...
-
Exergy performance analyses of an irreversible two–stage intercooled regenerative reheated closed Brayton CHP plant
A combined heat and power (CHP) plant model composed of an irreversible constant– temperature heat reservoirs two–stage intercooled regenerative reheated closed Brayton cycle and a heat recovery device is proposed using finite time thermodynamics. By taking dimensionless exergy output rate and exergy efficiency as the objectives, the performance of the plant is investigated. The two cases with ...
-
Kickoff for Biogas - South America Opts for Green Energy Made by WELTEC
Currently, the world is locked on to the FIFA World Cup in Brazil. Though they have already reached a high technical level as far as football is concerned, the South American countries still have development potential in the fields of biogas technology and renewable energies. In the interview, Aguinaldo Ramalho of the German biogas plant manufacturer WELTEC BIOPOWER talks about the potential, ...
-
Exergoeconomic based multi–objective optimisation of a solid oxide fuel cell system
In this study, the multi–objective optimisation of a solid oxide fuel cell (SOFC) system by defining the objective functions to maximise the power output, energy efficiency and exergy efficiency, and minimise the cost under various constraints is conducted. In this regard, energy, exergy and exergoeconomic analyses are performed. Some specific cases are considered and studied parametrically by ...
-
Cold exergy recovery during LNG regasification through a closed Brayton cycle
The liquified natural gas (LNG) regasification process is a source of cold exergy capable of being recovered for the exploitation of energy conversion. This paper presents a novel power plant structure that makes use of the LNG regasification process to increase the energy and exergy efficiency. The power plant consists of a closed Brayton cycle (CBC) fuelled by the flue gas released by the ...
-
A thermodynamic performance analysis of the transport sector of Nigeria
In this research, energy consumption data is subjected to the concept of energy and exergy utilisation assessment with application to the transport sector of Nigeria. The energy and exergy flows over the 21–year period (1988–2009) were taken into consideration. The sector comprises four sub–sectors namely the roadway, the seaway, the railway and the airway. Pipeline transport is also an important ...
-
Hybrid powertrain for light aircraft
In this paper, we evaluate the possibility of employing a hybrid powertrain to propel a light aircraft. The work suggests that the incorporation of a hybrid powertrain has little effect on fuel consumption for a light aircraft operating in a condition of straight and level cruise. However, there is a potential decrease in fuel consumption when a light aircraft operates either in climb or when ...
-
Application of reactor net models for the simulation of gas-turbine combustor emissions
The work deals with the evaluation of applicability of reactor net models and different reaction mechanisms for the predictions of emission characteristics of aero-engine combustors operating both in diffusion and in homogeneous burning modes. It is shown that the accuracy of the calculations of emission indices for NO x , CO and unburned hydrocarbons (UHC) is dependent strongly on the applied ...
-
Investigation of fatty acid methyl esters in jet fuel
Sustainable aviation fuels research has considerable momentum in efforts lead by government, academia and industry. Environmentally sound domestic fuels allow significant benefits, while also creating some challenges due to their novelty. One of these challenges is the cross contamination of fatty acid methyl esters (FAME) in biodiesel with jet fuels. It was suspected that sharing the same supply ...
-
Optimisation of energy and exergy of turbofan engines using genetic algorithms
This paper presents an application of genetic algorithm (GA) metaheuristics to optimise the design of two-spool separated-flow turbofan engines based on energy and exergy laws. The GA was used to seek the optimum values of eight parameters that defined the turbofan engine. A computer program called the TurboJet-Engine Optimiser v1.0 (TJEO-1.0) has been developed to perform thermodynamic property ...
-
Environmental Issue of Solar Energy
In today’s modernized society, demands of the usage of energy are increasing due to the uprising development of new inventions and technologies that requires electricity. Energy consumption is increasing also due to the growth of the population. Right now, as people have developed solar energy as one of the main alternatives for the shortage of power and views it as a solution to this ...
-
The Developing Role of Permanent Magnets in Renewable Energy
The developing role of Permanent Magnets in renewable energy production along with the environmental protection is a very worthy topic. An upright permanent magnet should produce a high magnetic field with a near to the ground mass, and should be constant against the inspirations which would demagnetize it. The desirable properties of such magnets are usually indicated in expressions of the ...
-
Things You Need To Know If You Wanna Buy a Solar PV System
As solar photovoltaic systems become more affordable, many consumers have begun to consider installing solar panels on their roof or surrounding property. A solar PV system can be a great investment for a home or business owner, but there are many important factors to consider. First, are you able to put solar panels on your home or property? Not only do you need suitable sun exposure, but you ...
-
Linking up: inclusive business models for access to energy solutions at base of the pyramid in India
The lack of access to clean, reliable and affordable energy solutions for meeting the basic needs for electricity and cooking has created a big barrier in the socio–economic development of the 400+ million people living across India in rural areas. Realising this as a challenge, Selco, Husk Power Systems and D.Light designed and implemented innovative business models to bridge the demand–supply ...
-
Is Solar Energy the Answer?
Due to the rising demands of electricity consumption brought to us by different factors, the world has faced a serious problem in terms of power shortage. It is because of the occurrence of new technologies and gadgets brought to us by the new millennium. As the growth of population also increases, more demand of electricity usage and consumption is presently rising. As you can see, insufficient ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you