Offshore Communications
AccountGuest Edition My Account My Che.com Log In

Archives :: Processing & Handling :: Thermal & Energy Management

Displaying 201 - 220 of 417 stories.
March 1, 2009
Nearly 30 years ago (May 6, 1979), U.S. President Jimmy Carter made the following prophetic statement at the inauguration of a solar-thermal water heater installed on the White House roof: "In the year 2000, the solar heater behind me will still be here, supplying cheap, efficient energy. A generation from now, this solar heater can either be a curiosity, a museum piece, an example of a road not...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/power_generation_and_transmission/Cover-Story-Solars-Second-Coming_4563.html
February 12, 2009
The Megawatter platform is a commercial implementation of Microbial Fuel Cells (MFC) technology for direct electricity or hydrogen generation on a large scale, while using wastewater as fuel by treating the organic materials...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Turn-wastewater-into-a-source-of-low-cost-electricity_4547.html
February 12, 2009
The new NT 500 plate heat exchanger sets new performance standards with a volume flow of up to 4,500 m3/h. The steel frame can hold up to a thousand plates, and the largest version is 4.7-m high and 1.6-m wide. The unit is available in...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/This-heat-exchanger-holds-up-to-a-thousand-plates-in-its-frame_4530.html
February 1, 2009
In a so-called thermoacoustic engine, researchers from the Energy Research Center of the Netherlands (ECN; Petten, Netherlands; www.ecn.nl) have achieved a record efficiency in the conversion of heat to sound, improving the existing record of 41% to 48% of the maximum possible efficiency (Carnot efficiency). The engine is being developed as a way to utilize the huge quantities of waste heat, which normally...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/Chementator-A-sound-way-to-reuse-low-temperature-waste-heat_4522.html
February 1, 2009
In these hard economic times, people working in troubled businesses may well envy the situation of Alberta’s oil sands industry. The Canadian Association of Petroleum Producers (CAPP, Calgary, Alberta; www.capp.ca) predicts that the production of synthetic crude from oil sands will reach 3.3-million bbl/d by 2020, up from 1.2-million bbl/d in 2007. Much of this oil will be sent to the U.S. via an...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Oil-from-Sand_4491.html
February 1, 2009
A continuous process for producing biodiesel that has a residence time of about one minute, versus several hours for a conventional batch process, has been developed at Oak Ridge National Laboratory (ORNL; Oak Ridge, Tenn.; www.ornl.gov). The process uses a centrifuge for simultaneous synthesis of biodiesel and separation of the biodiesel from the glycerol byproduct. ORNL has done laboratory tests and is...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/This-centrifugal-reactorseparator-speeds-up-biodiesel-production_4517.html
February 1, 2009
Lurgi GmbH (Frankfurt, Germany; www.lurgi.com) is building a pilot plant to demonstrate the viability of its three-stage bioliq process for producing liquid fuels from biomass. The pilot plant — an entrained-flow gasifier for the production of synthesis gas — will be located at the Karlsruhe Research Center (FZK; Germany; www.fzk.de), and is part of a joint project with the Karlsruhe Institute of...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Chementator-A-pilot-step-closer-to-second-generation-biofuels_4519.html
February 1, 2009
Global warming is of major concern today. There is increasing pressure on industry to reduce both energy usage and the associated CO2 emissions. An important and profitable action that industry can take is to recover more process energy and thus improve the efficient use of that energy. This not only reduces the cost of primary energy supply and lowers CO2 emissions, but also provides benefits in terms of...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Compact-Heat-Exchangers-Improving-Heat-Recovery_4500.html
February 1, 2009
The use of gasketed plate-and-frame heat exchangers has gained tremendous acceptance in the chemical process industries (CPI) over the past 20 years due to their high heat-transfer coefficients, compactness and low cost. However, it is important for the engineer who is selecting this type of heat exchanger to be aware of critical areas in design or selection so that possible operating or maintenance...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Plate-Heat-Exchangers-Avoiding-Common-Misconceptions_4501.html
February 1, 2009
Thanks to a €171-million financing deal, construction can begin on what is claimed to be the world’s first utility-grade solar power plant with central tower and salt receiver technology. When the so-called Gemasolar plant — located in Fuentes de Andalucia, Spain — is operational in 2011, it will produce 17 MWe of power, reducing CO2 emissions by more than 50,000 metric tons per year...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/power_generation_and_transmission/Chementator-Construction-to-begin-on-a-large-solar-plant-in-Spain_4515.html
January 23, 2009
Praxair, Inc. (Danbury, Conn.; www.praxair.com) has been awarded a hydrogen supply contract from Dynamic Fuels, LLC, a joint venture between Tyson Foods, Inc. and Syntroleum Corp. Dynamic Fuels will use H2 supplied by Praxair to produce renewable fuels from non-food-grade animal fats produced or procured by Tyson Foods...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Praxair-awarded-H2-contract-by-Dynamic-Fuels_4482.html
January 13, 2009
Siemens Energy (Erlangen, Germany; www.siemens.com/energy) received a contract from its Indian licensee Bharat Heavy Electricals Ltd. (BHEL) for the supply of components for two steam turbine-generators. The customer is the state-owned energy utility National Thermal Power Corporation Ltd. (NTPC). The volume of this order is approximately 80-million euros. The coal-fired power plant Barh II is situated 75...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/power_generation_and_transmission/Siemens-to-supply-key-components-to-India-for-advanced-steam-power-plants_4472.html
January 1, 2009
As an energy resource, global coal reserves represent 2,000 billion barrels of oil equivalent. In 2007, global oil reserves were about 1,300 billion barrels of oil. World wide, oil demand will grow 40 to 50% by 2030. But coal offers an opportunity to diversify worldwide liquid-fuel supplies and coal utilization to produce fuels that can extend the lifetime of world oil reserves. This is a strategic...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/A-primer-on-coal-to-liquids_4431.html
January 1, 2009
Coal is typically cleaned by gravity separation to reduce ash and pyrite content, with flotation used to recover fines. Various methods have been applied to disperse fine clay particles from the surface of coal particles and thus improve coal flotation performance. A team of researchers from the Ian Wark Research Institute, University of South Australia (Adelaide; www.unisa.edu.au), has studied the effect...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Chementator-Pretreatment-helps-recover-more-coal-from-primary-flotation-step_4457.html
January 1, 2009
A new method for vaporizing liquefied natural gas (LNG) that is more environmentally friendly than the traditional submerged combustion vaporization (SCV) process is being offered by Black & Veatch (B&V; Overland Park, Kan.; www.bv.com). In an SCV process, LNG is passed through stainless steel tubes in a water bath that is warmed by sparging combustion gases from a submerged, gas-fired burner. The...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Chementator-This-LNG-vaporization-process-will-reduce-air-emissions_4462.html
December 1, 2008
The thermal conductivity of hydrocarbons is an essential parameter that needs to be known when designing heat transfer equipment. Presented here is a simple-to-use correlation that was developed for predicting thermal conductivities of liquid paraffin hydrocarbons, petroleum fractions and atmospheric natural hydrocarbon gases as a function of temperature and molecular weight or relative density. Results...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/Engineering-Practice-Estimating-Thermal-Conductivity-of-Hydrocarbons_4388.html
December 1, 2008
In a fired thermal fluid heater, a thermal fluid is heated by the metal surfaces of a fired heater or fluegas heat-recovery exchanger. Generally, the heat input rate is controlled to achieve some desired bulk-fluid temperature exiting the heater. However, in being heated to the outlet setpoint, the fluid film in contact with the heating surface is always exposed to a higher temperature than the bulk fluid...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Cover-Story-Part-1-Heat-Flux-And-Film-Temperature-In-Fired-Thermal-Fluid-Heaters_4384.html
December 1, 2008
Organic-based thermal fluids provide relatively trouble-free service for significant periods of time. However, there comes a time when any fluid (either aromatic- or aliphatic-based) needs to be replaced. Since aromatic-based fluids generally cost more and are complicated to dispose of, they receive far more attention than aliphatic-based fluids when the time comes for replacement. Aliphatic-based fluids...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Cover-Story-Part-2-Heat-Transfer-Fluids-Maintaining-the-System_4385.html
December 1, 2008
ESK Ceramics GmbH & Co. KG (Kempten, www.esk.com), together with Pfaudler Werke GmbH (Schwetzingen, both Germany; www.pfaudler.de), has launched a new plate heat exchanger made of silicon carbide. ESK is producing the ceramic heat exchangers on a large scale for the first time, and Pfaudler will handle global sales of the components. Three different models are available — sealed, semi-welded and...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Chementator-Ceramic-heat-exchangers-offer-more-than-corrosion-resistance_4399.html
November 1, 2008
A very common heat exchanger in the chemical process industries (CPI) is the vertical thermosiphon reboiler (VTR; Figure 1). Due to size and fluid-flow restrictions, however, its heat transfer rate is often quite low. The subcooled region formed at the thermosiphon’s tube-bundle base usually causes reduction in the tubes’ average heat-transfer coefficient. Improvements in performance can be...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Engineering-Practice-Get-More-From-Vertical-Thermosiphon-Reboilers_4321.html
Pages: « Previous  2 3 4 5 6 7 8 9 10 [11] 12 13 14 15 16 17 18 19 20 Next »

Get more from Che.com
Get email updates in your inbox

 

Subscribe to:
Chemical Engineering Magazine

Chemical Engineering Magazine and Archives

Plant Cost Index

Join us on... Twitter LinkedIn

LinkedIn Groups

Our LinkedIn group is now over 21,000 members strong!

  1. Join other CPI professionals from all over the globe and share best practices, expertise, concerns and more.
  2. Provide feedback to Chemical Engineering Editors


Current members represent Worley Parsons, DuPont, SABIC, Fluor, Air Products, LyondellBasell, Nalco, Dow Chemical, Dow Corning, BASF, Jacobs Engineering, ExxonMobil, Shell, Chevron and more.

Join Now



We also offer the following subgroup for more targeted discussions:

Tools
Search the Buyers' Guide

Plant Cost Index

Facts at Your Fingertips (archive)

Ask the Experts

Back Issues
X
To access this area, please log in or create an account.
Username:
Password:
Forgot your password?
Request it now.
Processing...