Heat Recovery Articles
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A study on the thermodynamic analysis of a cascaded latent heat storage system over the single storage tank system for diesel engine waste heat recovery
This article presents the comparison of performance of a cascaded Latent Heat Storage (LHS) system over the Single Storage Tank (SST) system for heat recovery from a diesel engine. The energy and exergy saved and efficiencies during the charging process are evaluated and reported using actual system data. The discharge process is analysed with a case study and it is concluded that it is possible ...
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The natural gas revolution: Good or bad for energy efficiency?
If there were an equivalent in the energy industry to Time Magazine’s Person of the Year, natural gas would be this year’s winner. The dramatic rise in natural gas supply, and fall in price, has reconfigured the energy scene in the United States, suddenly creating a bounty of domestic energy, driving down wholesale power prices and speeding retirement of polluting coal-fired plants. ...
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Thermo–economic analysis of heat pipe heat exchanger for waste heat recovery in thermal systems
Thermo–economic analysis of Heat Pipe Heat Exchanger (HPHE) for waste heat recovery in thermal systems using the P1–P2 and NTU methods is presented. The optimum effectiveness of a HPHE is given as a polynomial equation, whereas the net savings and payback period are given in closed form to enable the HPHE designer to determine the optimised values directly. In addition to this, exergy analysis of ...
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Efficient steam production in paper mills
The paper and pulp industry is an energy and emission intensive industry. Steam is an essential part of the paper making process with steam boilers, steam distribution systems and other processes accounting for a large percentage of a paper mill’s energy costs. Useful energy is often lost from boilers and process equipment such as heat exchangers, dryers, evaporators etc, as well as from ...
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Rutherford Appleton Laboratories - Case study
The new Research Complex at Harwell Oxford is a multidisciplinary laboratory providing world leading facilities for new and cutting edge research in both life and physical sciences and the interface between them. Environmental issues were at the forefront of the building design with all energy use carefully monitored. An innovative Earth Tube has been buried along side the building to utilise ...
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Biomethane enters the gas grid article for energy world
The Carbon Plan, published in 2011, aims to reduce UK carbon emissions by a quarter from 1990 levels. With the current policies in place, the UK is on target to reduce emissions by over a third by 2020 and with the introduction of new technologies this should increase to an 80% reduction by 2050. However, currently around half the UK’s carbon emissions result from heat related processes and ...
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UK AD & Biogas Food for thought?
Food for thought? Showcasing their latest systems for converting food waste, entec biogas gmbh sees the Show as an opportunity to build relationships with companies working in the food sector. Project Development Manager and CEO Bernhard Schulz comments: "We see the Show as a great opportunity to highlight the forty plus international biogas projects which we've worked on over the last 20 years. ...
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Organic Rankine Cycle (ORC)
Biogas/Heat-to-Power Application using a Dreyer & Bosse CHP power unit Location: Trechwitz, Germany Site Gross Power Output Range 500Kwe + 30-35kWe from Electratherm ORC Thermal Heat Input Range: ?375-450kWt Hot Water Input Range:? 90-95°C (118-203°F) Hot Water Flow Range:? 39 m3/hour (172 GPM) Ambient Temperature: 0-15°C (32-59°F) ElectraTherm installed its first ...
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Conch case study
A major advancement for industrial energy efficiency in China made possible through technology transfer Camco is working with Anhui Conch Cement Company Limited, the largest cement producer in China, on a programme of energy efficiency projects at multiple Conch production facilities. The projects all use Japanese advanced high efficiency waste heat recovery technology, never before commercially ...
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Taishan case study
Breaking new ground in China's industrial energy efficiency Located in the Tai'an, Shandong Province, China, this is the world's first cement sector project to achieve CDM registration, and the first industrial waste heat to power project undertaken in China. The project captures waste heat from the cement making process and utilises it to produce power in a 13.2 MW power plant. The Taishan ...
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Thermodynamic and exergy efficiencies of magnetocaloric energy conversion utilising industrial waste heat
An investigation under which conditions industrial waste heat utilised with magnetic energy conversion machines can be a possible alternative to conventional energy conversion technologies is presented. The application of a numerical model leads to the thermodynamic efficiency, the exergy efficiency, and approximate values of the total mass and the total volume of a magnetic energy conversion ...
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Basin Electric - wind and waste heat
Location: Waste Heat Recovery projects in Culbertson, MT and Garvin, MN – Wind Projects Located in South Dakota and North Dakota Project Start Dates: 2009 – 2011 Element Markets is helping Chevrolet meet its CO2 reduction goal, and simultaneously helping a large Midwest power cooperative earn revenues needed to support its clean energy projects. This win-win arrangement came about ...
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A novel cogeneration cycle based on a recompression supercritical carbon dioxide cycle for waste heat recovery in nuclear power plants
In this study, a novel cogeneration cycle based on the recompression S–CO2 Brayton cycle is proposed, analysed and optimised thermodynamically to utilise the waste heat from a nuclear power plant. The cycle was constructed theoretically on the basis of a transcritical CO2 power cycle and a LiBr/H2O Absorption Heat Transformer (AHT) to enhance the overall performance of the cycle. It was found ...
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Thermal characteristics in latent heat energy storage system using paraffin wax
An energy storage system has been designed to study the heat transfer characteristics of paraffin wax during melting and solidification processes in a vertical annulus energy storage system. In the experimental study, three important issues are focussed. The first one is temperature distribution in the phase change material (PCM) during the phase change processes. The second one is the thermal ...
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Energy conservation in aluminium foundries by waste heat recovery from solidifying molten metal
This paper presents a unique attempt to preheat the raw materials by recovering the waste heat from solidifying molten metal in shape castings of aluminium using sand moulds. Finite element analysis of the problem using ANSYS has also been done, results of which show satisfactory agreement with the experimental results. By using this preheating method, it is proved that around 16% of heat ...
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Performance enhancement of GT–ST power plant with inlet air cooling using lithium bromide/water vapour absorption refrigeration system
Performance improvement techniques in power generation systems especially in gas turbine–steam turbine (GT–ST) combined cycle (CC) power plants by compressor inlet air cooling prove to be much improvising. In this work, the performance enhancement of CC power plant by inlet air cooling method using lithium bromide–water (LiBr/H2O) absorption refrigeration system powered by waste heat from heat ...
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Exergoeconomic optimisation of steam power plant
The second law of thermodynamics combined with economics forms a powerful tool for systematic analysis and assessment of energy systems. This paper presents an exergoeconomic optimisation of 50 MW steam turbine power plant associated with a large fertiliser industrial unit through Thermoeconomic Evaluation and Optimisation (TEO) method, and identifies the losses in various components. As the ...
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Heat recovery and energy efficiency, improves profitability and reduces CO footprint
Using latest technology in combustion of oil and gas can provide significant savings in overall energy consumption. Modern oxygen control that compensates changes in ambient temperature and fuel qualities can increase energy efficiency up to 3%. By adding the usage of hot combustion air another 2-3% can be saved. Modern burner technology without mechanical linkage, operating with accurate ...
By Oilon Oy
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The performance and emission characteristics of a diesel engine using preheated Kusum oil and Kusum diesel blend
Rapidly depleting conventional petroleum resources have prompted research for alternative fuels. Among various possible options for internal combustion engines, fuels derived from triglycerides (vegetable oils/animal fats) are a promising substitute for diesel fuel. Vegetable oils pose some detrimental characteristics like high viscosity and low volatility compared to diesel fuel. In the present ...
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Clean energy: How much hot air?
NewScientist’s January 28 issue is likely to unsettle clean energy advocates – but it is worth the read. The cover article, “Power paradox: Clean might not be green forever,” posits that even renewable energy can warm the planet, and eventually change climate, if we continue to ratchet up power production to serve our ever increasing demand for electricity. It turns out ...
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