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

Displaying 21 - 40 of 417 stories.
March 1, 2013
The carbon-fiber pilot line consists of an oxidation furnace, carbonization furnace and a graphitization furnace, The four-zone oxidation furnace...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/kilns_ovens_and_furnaces/A-furnace-system-for-processing-carbon-fibers_10272.html
February 1, 2013
Supplying steam that meets process needs while protecting steam-system components, such as boilers and steam turbines (Figure 1), against scale, fouling and corrosion, requires purified feedwater (condensate plus makeup water). Depending on the steam pressure required, the specific approach of the water treatment may be shifted to account for a variety of issues. For example, caustic corrosion and...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/Steam-System-Water-Preparation_10176.html
February 1, 2013
 Figure 1. A handful of ceramic proppants is shown here Carbo Ceramics This article covers permitting and directly related design issues associated with thermal processes using drying and calcining for the production of both proppant sand and ceramic proppants (Figure 1) as an illustrative example (see sidebar, "What are proppants"). The permitting issues vary significantly with air-quality...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/kilns_ovens_and_furnaces/Environmental-Permitting-Barriers-for-Dryers-and-Kilns_10180.html
January 1, 2013
Waste heat recovery (WHR) is essential for increasing energy efficiency in the chemical process industries (CPI). Presently, there are many WHR methods and technologies at various stages of implementation in petroleum refineries, petrochemical, chemical and other industry sectors. Increasing energy costs and environmental concerns provide strong motivation for implementing more and newer methods and...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/Waste-Heat-Recovery-Methods-And-Technologies_10084.html
January 1, 2013
The ASME Boiler and Pressure Vessel Code (ASME BPVC), which is administered by ASME (New York, N.Y.; www.asme.org; founded as the American Society of Mechanical Engineers), is a well-established standard for the design and fabrication of boilers and pressure vessels. ASME code-symbol stamps show compliance with the requirements of the standard, but code stamping of steam systems in ethylene and other large...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/Applying-ASME-Boiler-Code-to-Steam-Generation-Systems_10086.html
December 1, 2012
This company is introducing two new rotary tube furnaces that are suitable for heat treatment; calcination of powders, granules and fibers; pyrolysis; and the recycling...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/kilns_ovens_and_furnaces/Rotary-tube-furnaces-for-temperature-up-to-650°C_10018.html
November 1, 2012
For oil-and-gas and power-generation applications, the RB211 gas-turbine systems have already proven themselves, with more than 700 units now recording over 30 million...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/power_generation_and_transmission/This-turbine-upgrade-delivers-10-percent-more-power_9912.html
October 1, 2012
Today’s chemical processors must cope with rising labor costs, increasing global competition, escalating fuel costs and more-stringent safety and environmental regulations. To improve productivity and reduce costs in today’s competitive environment, many facilities are operating leaner than even before. And, downsizing strategies have seen the reduction of maintenance staff, which often results...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/A-Steamy-Situation_9765.html
October 1, 2012
The RediHeat instantaneous water heater can produce hot water instrantly within ±4F of the set temperature under widely varying demands. Designed with a unique feed-forward...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/Use-this-heater-for-instant-hot-water_9821.html
October 1, 2012
The Pluto mini-desublimator is used to separate substances in applications such as for tank breathing, thereby reducing emissions to the environment, for recovering raw materials or for protection of downstream vacuum generators. Gas comes in contact...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Separate-components-from-gases-with-this-desublimator_9813.html
September 1, 2012
The new GEMÜ 505 (hand-operated; photo) and 555 (pneumatic) angle seat valves were developed for pure steam shutoff valves, and are available in nominal sizes from DN 8 to DN 80. The valves provide an alternative to the...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/Aseptic-globe-valves-for-pure-steam-applications_9657.html
September 1, 2012
Corrections: From the October 2012 Letters page: This original article, which appeared in the print edition of Chemical Engineering (September 2012), had two errors: Equation (19) should read D = log (TH)-0.4, and Table 2 was missing decimal points in all numbers on both the x- and y-axes. The corrections are shown here. Recirculating cooling-water systems are essential parts of many facilities throughout...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Cooling-Water-Outlet-Temperature-Evaluating-The-Best-Maximum-Value_9683.html
September 1, 2012
Compared with the use of hotplate stirrers or heating mantles, the Stem RS, Stem Omni and Stem Integrity Reaction Stations can reduce energy costs by as much as 90%, says the manufacturer. Equipped for parallel...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/kilns_ovens_and_furnaces/Save-energy-with-these-laboratory-reaction-stations_9660.html
August 1, 2012
The main function of the expansion tank in a heat-transfer system is to allow space for the heat-transfer fluid to expand as it is heated. A properly designed, installed and maintained expansion tank will support longer fluid and equipment life, safe operation and easier maintenance. Configuration The expansion tank is best located at the highest point in the system to provide a positive pressure head to...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/Heat-transfer-expansion-tank-design_9550.html
June 1, 2012
One of the most energy-intensive utilities for many facilities in the chemical process industries (CPI) is the steam system. Traditionally, steam-use optimization has centered on efficient heat transfer and eliminating waste [ 1]. Further optimization can involve a broader look at how steam supply and consumption interact dynamically throughout a large complex. This type of optimization often results in...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/Dynamic-Modeling-for-Steam-System-Control_9388.html
June 1, 2012
  A gas flare is an elevated vertical conveyance found accompanying oil wells, gas wells, drilling rigs, petroleum refineries, chemical plants, natural gas plants and so on. Although modern flare systems are specifically designed to reduce the thermal radiation, pollution and acoustic impact of a flare, a considerable amount of radiation is nevertheless emitted by an operational flare as a result of...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/kilns_ovens_and_furnaces/CFD-Analysis-of-Heat-Transfer-From-Flares_9390.html
May 1, 2012
The P46S steam trap is the newest model in this company’s PowerDyne product line. The design is said to optimize durability, energy efficiency and reliability. The design of...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/This-steam-trap-has-a-durable-and-efficient-design_9279.html
May 1, 2012
The Iceman SM Series is a line of high-efficiency chillers available in capacities from 5 to 15 hp. Iceman chillers utilize Copeland Scroll Digital compressors, which are...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/These-chillers-are-portable_9283.html
May 1, 2012
The FFB-8 is a precision fluidized bath with exceptional stability and uniformity for temperature sensor calibration and heat-treatment processes. It offers a built-in dust extraction and collection system, as well as a wide operating range (122–1,292°F) and PID (proportional integral...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/This-fluidized-bath-has-a-built-in-dust-extraction-system_9293.html
April 1, 2012
The closure of several U.S. petroleum refineries over the past few months carries a simple message: petroleum refining is a tough business to be in these days. Paradoxical as it may seem to consumers, the recent rapid increase in fuel prices does not represent higher profits for refiners, which are generally operating with low margins, but is simply due to the higher cost of crude oil. Sunoco, Inc...
http://www.che.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Challenges-for-U-S-petroleum-refiners_9176.html
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