waste heat Articles

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Market versus planning failures: the case of the German heating sector

by Inderscience Publishers  (Sep. 13, 2004)

One major reason for the waste of resources is market failures. Another important reason is planning failures in governmental interventions that exactly aim at the alleviation of these market failures. In this paper, we will illustrate, by way of example, how these failures may interact. Furthermore, we present a way out from the illustrated ...

Low grade heat utilisation for seawater desalination by the HTTF process

by Inderscience Publishers  (Apr. 11, 2006)

To improve heat transfer efficiency, Horizontal Tube Thin Film (HTTF) evaporators are being used in multieffect desalination plants. These plants require less pumping energy than thermal-based desalination plants. To generate the design data, experimental studies were carried out in a single-tube HTTF experimental setup, and heat transfer ...

Class a biosolids production at eastern municipal water district using heat pasteurization

Since 1998, the Eastern Municipal Water District (District) has developed and successfully operated a heat pasteurization facility to treat extended aeration waste activated sludge (WAS) from the Perris Valley Regional Water Reclamation Facility (PVRWRF). The treatment train uses hot water to sludge spiral heat exchangers and a patented ...

Exergetic performance of eco friendly absorption heat transformer for seawater desalination

by Inderscience Publishers  (Dec. 3, 2010)

Vapour Absorption Heat Transformers (VAHT) have shown good potential for upgrading waste heat to useful temperature levels. VAHT can be effectively coupled with Multi Effect Desalination (MED) systems for water purification. In this study an exergetic analysis is carried out for VAHT integrated with MED. A simulation model has been developed to ...

Thermodynamic analysis of a hybrid gas turbine/thermoacoustic heat pump/refrigeration engine

by Inderscience Publishers  (Nov. 4, 2014)

Possible performance enhancement of small gas turbine power plants through the application of thermoacoustic systems is examined. The thermoacoustic subsystem is powered only by the waste heat of the gas turbine. Two different gas turbine configurations are considered: a Thermoacoustic refrigerator assisted gas turbine (TRG) and a Combined ...

Steam injection heating of Waterwater, Sludge & BioSolids, & High Viscosity Fluids

by ProSonix  (Feb. 1, 2009)

A number of unique challenges emerge in the heating of agricultural, municipal, and food waste streams in anaerobic digestion process and biogas production. Heating devices are subject to variable size particulate, fibrous materials, wear, temperature, flows, and fluid characteristics that can make it extremely difficult to achieve and maintain ...

Heat Pump Used to Drain Contaminated Sludge in a Steel Factory

Summary In 1987, new regulations required that factories dispose of their contaminated water and waste themselves. Making galvanised steel wire, the Stelfil factory produces sludge contaminated with lead and zinc. Stelfil spent thousands of dollars to bury this waste and evaluated three systems to remove most of the water: a gas dryer, an ...

Landfills case study: Space heating with LFG: Small project-big savings

by Waste Advantage Magazine  (Feb. 1, 2011)

On a typical January morning in Minnesota, a landfill operator is working on the compactor’s transmission. Despite the four inches of snow on the ground, he opens the garage doors in the maintenance building to let out some of the excess heat. Unlike previous winters, this year the operator can afford to crank up the heat in the building ...

New manure digester generates heat at World Dairy Expo

by Himark bioGas Inc  (Sep. 27, 2010)

For anyone visiting the World Dairy Expo, there can be a lot to digest. The world's largest dairy trade show begins Tuesday at Alliant Energy Center. Around 65,000 people are expected to attend. There are 752 companies and organizations exhibiting and there will be approximately 3,000 cows on the grounds. There will be 14 cattle shows, eight ...

Coupled Heat and Moisture Flow in Unsaturated Swelling Clay Barriers

by ASTM International  (Jun. 1, 1996)

The main thermodynamic forces active in the near field of a nuclear fuel waste multiple barrier system during the unsaturated stage are the gradients of temperature, fluid pressure, and chemical potentials. The processes that have a direct impact on the transport mechanism of heat and moisture within the clay-based compacted buffer material are ...

Reduction of ammonia emissions during composting by Uncoupling of oxygen demand and heat removal

by ORBIT e.V.  (Jan. 2, 1999)

Intensive pig production systems result in high emissions of ammonia, odour and greenhouse-gases (methane and laughing gas) by exhaust ventilation air. Moreover, large amounts of manure (faeces and urine) are produced with insufficient nearby land for applications (Imbeath, 1998). These outputs lead to environmental problems related to ...

Heat recovery and energy efficiency, improves profitability and reduces CO footprint

by Oilon Oy  (Feb. 7, 2012)

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 ...

Combined heat & power is a clean, efficient and economic energy solution

by Shenton Group  (Oct. 12, 2011)

The 21st century has highlighted a need for clean, efficient and economic energy, which has put Combined Heat & Power (CHP) into the limelight. By providing on-site power generation, waste heat recovery and system integration, CHP offers a realistic, near-term solution for exceptional energy efficiency and emission reduction. CHP systems can ...

Removal of Heat stable salts – A solution to Amine plant operational problems

by Eco-Tec Inc.  (Apr. 24, 2013)

Introduction Amine scrubbing solutions are used to remove hydrogen sulfide and carbon dioxide from gas streams in many natural gas conditioning plants and oil refineries. Two major problems represent a significant threat to an amine gas treating plant: corrosion and instability of operation, resulting in unscheduled upsets and outages. In this ...

VacuDry Indirect heated vacuum thermal Desorption by econ industries - case study

by econ industries GmbH  (Feb. 6, 2014)

With the VacuDry8 technology the energy-efficient treatment of hazardous and industrial waste as well as contaminated soil, oil sludge and secondary raw material is realized. Controlled vacuum and heat are used to separate minerals from oil, solvents, mercury and other hazardous substances.    At the core of the econ VacuDry8 ...

Replacement of Salt Baths with Fluidised Bed Furnaces: Quality Heat Treatment

Quality Heat Treatment has developed a fluidised bed heat treatment technology which replaces the older molten salt technology. This eliminates concerns about disposal of cyanide salts and workplace safety issues that are associated with the molten salt technology. A payback period of approximately two years is expected on an average sized ...

Olive mill waste water treatment

by EVALED - Veolia Water Technologies  (Jun. 4, 2013)

The production of olive oil generates two kind of waste waters: RINSING WATERS: the quantity is subject to change. It can be re-circulated, after the settling to remove the solids, or discharged directly. SLUDGE: vegetation water with additional water, whose quantity is subject to change. In case of traditional oil mills, the hot additional ...

Wasting energy through steam loss

by Thermal Energy International Inc.  (Jun. 21, 2011)

The European Union Directive on the Energy Performance of Buildings, which relates to all member nations of the European Union, are obliged to set limits on greenhouse gas emissions, particularly from buildings. Typically steam is used for a wide range of applications within larger establishments including, humidification, hot water, space ...

Treating organic waste with Cambi® THP

by Cambi AS  (Jan. 2, 2008)

This paper describes how the Cambi Thermal Hydrolysis Process (THP) treats biodegradable organic waste and converts it to renewable energy and pathogen-free and bio-fertilizer. The interest for the process is expected to increase due to new environmental legislation as well as increasing demand for renewable energy. The implementation of the ...

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