Showing results for: waste heat Articles
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Exergy or the entropic drive: waste heat and free heat
The dissipation of exergy is conventionally held to be the inference of the entropy growth. In this conventional perspective, the universe is running down towards equilibrium or heat death. Recent cosmological findings of 1998–2000 give empirical evidence that the universe is instead moving away from equilibrium while its entropy increases. We can better comprehend this non–equilibrium world by ...
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RED Heat to Power Project
A new research project, funded in the EU Horizon 20020 in the field of "Future Energy Technologies", with 4 scientific institutes and 2 companies. This project is focussed on the research and development of a novel energy technology to convert low grade waste heat (40 - 90 °C) in valuable electricity. It is targeted to add an unexplored sustainable energy source against low electricity ...
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Development of a lignite-fired power plant concept with integrated pressurised fluidised-bed drying and fuel cells
In the coming decades, lignite will become one of the most important fuels for power production in Germany. In the last five years, Vattenfall Europe and RWE have put power plants of the 800–1000 MW class with efficiency of up to more than 43% into service. Four to five per cent efficiency can further be gained by using pre-dried lignite as fuel (BOA plus concept of RWE). Additional steps are ...
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Thermodynamic analysis of chimney
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 ...
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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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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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Is waste heat the silver bullet?
The energy industry tends to get stuck on certain words. Silver bullet is one of them. Insiders and policymakers often like to say there is no silver bullet to fix US energy woes. We need a portfolio of solutions – renewables, efficiency, smart grid, transmission expansion, coal sequestration, etc. That may be true, but Tom Casten begs to differ. Casten is a bit of a rock star in the field of ...
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Energy and exergy analysis of a combined transcritical CO2 compression refrigeration and single effect H2O-LiBr vapour absorption system
A refrigeration system is conceived and analysed wherein high grade waste heat from the gas cooler of a TCRS is utilised to operate a single effect H2O-LiBr VARS. A simulation program is developed for computation of optimum gas cooler pressure of TCRS. The COP and ? ex for individual TCRS and VARS as well as for the combined system have been evaluated. For different values of evaporator ...
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Nuclear desalination by waste heat utilisation in an advanced heavy water reactor
The use of thorium for nuclear power generation is an important element of the Indian atomic energy programme. The design and development of the Advanced Heavy Water Reactor (AHWR) is a step in this direction. Intensive design activity is underway to set up a 300-MWe AHWR. The design of the AHWR incorporates several features to simplify the design and to eliminate certain systems and components, ...
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Thermodynamic analysis of efficient recovery and utilisation of waste heat resources during sintering process
Efficient recycling and utilisation of waste heat resources are among the primary methods in saving energy during sintering process, as waste heat resource recycling and utilisation are essentially energy conversion process. The purpose of this study is to analyse energy conversion and utilisation during the sintering process, and waste heat resources in each subsystem during the sintering ...
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Client - Oil Refinery, Eastern Europe
Project - Heavy Oil Pre-Heater As part of an overall facility upgrade this major oil refinery decided to seek ways of reducing its heavy oil pre-heating costs. A proposal was submitted that would enable waste heat from the refinery to be used as the source to safely pre-heat the stored heavy oil. The solution proposed the use of a gas to water recovery unit coupled to two heat pipe based oil ...
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Ottawa Hospital, Ottawa Heart Institute, Ottawa, Ontario, Canada
Boiler Plant Application Objective The turnkey FLU-ACE waste heat recovery system was installed by Thermal Energy on four boiler exhausts from a power plant which produced a peak (winter) steam rate of 70,000 lbs/h. The system was designed to recover 10 mmBTU/h of otherwise wasted energy. The recovered heat is used to heat the the world-famous University of Ottawa Heart Institute Research ...
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Heat recovery from corrosive flue gas
For improvements to energy efficiency in the petrochemical industry, waste heat recovery from corrosive flue gas is the most cost effective source to exploit During the conversion of primary energy, approximately 5-10% of the energy used is lost via hot flue gas. There is no need to emphasise that significant savings are within reach when 60-70% of refining operational costs consist of energy ...
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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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New Head Office and Lab Building, Riedering, Germany - Case study
The company EndoLab - a test lab or medical implants - moved its headquarters from Thansau to Riedering near Rosenheim and built a new office and laboratory building for this new location. The task in the first planning phase was the development of a location-specific energy concept as well as climate concepts adapted to the building uses. A number of main uses are defined within the building: ...
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Gatineau Hospital, Gatineau, Quebec, Canada
Commercial Boiler Application Thermal Energy installed FLU-ACE system to recover 5.5 mmBTU/h of waste heat from the flue gases emanating from three Volcano water tube boilers. The single 16 ft. high FLU-ACE tower replaced three independent boiler steel stacks. The installation is unique in several ways, including the very high temperature of the flue gases (up to 650 °F) processed by the ...
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High efficiency and competitive edge thanks to free-of-charge waste heat - Case Study
Location: Wöbbelin (Germany) Capacity: 2 x 526 kWel Input materials: Manure, renewable resources Features: All the waste heat of the biogas plants is used for heating the farm’s greenhouses and buildings. The biogas plant in Wöbbelin In 2005 the first 500 kWel biogas plant was built on the Hof Denissen together with EnviTec. Two years later the next plant went into operation. ...
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Activated carbon regeneration furnance waste heat recovery system - Case study
A UK-based edible oils processing plant use activated carbon in order to clean up various contaminants contained within the oils for product quality reasons. The spent carbon is regenerated on-site in a gas fired rotary hearth furnace and the hot exhaust gases (700°C) from the furnace are a valuable high grade source of waste heat. Waste heat recovery system installed for a UK based edible ...
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Case Study: Yarn Dryer Waste Heat Recovery System
When a UK-based textiles manufacturing plant were looking to increase the energy efficiency of its twin yarn drying process lines ThermTech designed, manufactured and installed a waste heat recovery system which met their needs. The two dryers originally exhausted both hot and humid air to atmosphere at around 140°C. A simple, self-controlling and cost effective heat recovery system was ...
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How to Use the Waste Heat in Your Factory as an Energy Source
Modern factories are investing in technology to reduce their energy consumption, costs and CO2 emissions. This is not new, but the process of digitalisation and decarbonisation has accelerated to meet global energy transition and sustainability goals.In addition, the constant increase in energy costs pushes companies to become more efficient and reduce overall expenditure to stay competitive. If ...
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