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

Displaying 41 - 60 of 424 stories.
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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Challenges-for-U-S-petroleum-refiners_9176.html
April 1, 2012
The approaches currently used by process integration specialists to assess the opportunities for the integration of reboilers are frequently erroneous and lead to proposals that have to be rejected at the detailed engineering stages or worse, to commissioned reboilers that do not perform properly. This article examines the integration of both vertical and horizontal thermosiphon reboilers, and covers the...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Thermal-Integration-Of-Reboilers_9180.html
March 1, 2012
With these two energy-use monitors, companies can gain insight into how, when and where energy is being expended throughout a production process. The PowerMonitor W 250 (photo) features a self-generating wireless...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/Track-energy-usage-with-these-monitors_9044.html
March 1, 2012
Last month, this company launched a new version of its Stateview system for detecting leaks in district energy systems. Stateview System II (photo) boasts a ten-fold increase in wireless...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/Detect-leaks-from-heating-pipes-with-this-system_9063.html
March 1, 2012
The Simetal EAF FAST DRI is a new electric arc furnace that is specially designed for the use of direct reduced iron (DRI). It allows a continuous melting process, as electric energy...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/kilns_ovens_and_furnaces/New-electric-arc-furnace-for-steelmaking_9069.html
February 1, 2012
Various misconceptions arise when it comes to the thermal design of cooling towers. Sometimes related parameters, such as range, approach, effectiveness, liquid-to-gas ratio ( L/G), wet-bulb temperature, cooling water temperature, relative humidity, number of transfer units (NTU) and other terms create a confusion for the designer in effectively sizing, selecting and evaluating a particular cooling tower...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Effective-Thermal-Design-Of-Cooling-Towers_8949.html
January 20, 2012
Green Biologics Ltd. (GBL; Abingdon, Oxfordshire, U.K.; www.greenbiologics.com), an industrial biotechnology company has merged with Butylfuel Inc., a U.S.-based renewable chemicals and biofuels company. The new company will operate under the Green Biologics name and will continue to be...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Biobutanol-manufacturers-merge_8916.html
January 11, 2012
In the long run (a few hundred years, perhaps) humans will exhaust the Earth’s current supply of fossil fuels. It is more accurate to say that before we exhaust the supply, humans will stop burning fossil fuels to produce electricity and power our vehicles because fossil fuels will have become too valuable. From a chemical engineering perspective, would it not be more appropriate to use fossil fuels...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/fuels/Global-Energy-Future-The-300-year-Outlook_8874.html
January 1, 2012
Mechanical integrity is an essential consideration in heat exchanger design. The most common threat to this integrity is tube bundle vibration. So, the computer programs used for heat exchanger design incorporate procedures that assess this threat. However, such analysis is generally undertaken after exchanger geometry has been identified. The result can be that geometry that is optimal in terms of thermal...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Designing-Shell-and-Tube-Heat-Exchangers-Avoid-Vibration-From-The-Start_8834.html
January 1, 2012
In the chemical process industries (CPI) it is relatively common to use a homogeneous two-phase flow model to predict the pressure drop through the shell-side of horizontal heat exchangers that handle two-phase mixtures. Recent experimental studies reported by HTFS [1, 2], however, have shown that this approach leads to overprediction of pressure drop and to overprediction of thermal performance. As a...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Designing-Shell-and-Tube-Heat-Exchangers-Consider-Two-Phase-Flow_8839.html
December 1, 2011
Steam traps are designed to allow condensate, but not steam, to escape from a steam line. When they malfunction, however, numerous costly consequences can result including energy losses, insufficient heating to processes, maintenance issues and more. At its Global Users Exchange in late October...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/boilers_and_steam_handling/Detecting-steam-trap-leaks-gets-easier_8728.html
December 1, 2011
Last month at the Brau Beviale 2011 Exhibition (November 9–11; Nuremberg, Germany), Alfa Laval AB (Lund, Sweden; www.alfalaval.com) launched a new plate heat exchanger, which combines the energy efficiency, accessibility and modularity of plate technology with the viscous and particulate-handling capabilities of tubular technology. The so-called FusionLine features a...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/heat_exchangers_condensers_and_coolers/Heat-exchanger-fusion_8742.html
December 1, 2011
Articles about thermal fluid systems often start with a variation of the statement that “thermal fluid systems typically require little ongoing maintenance for the first few years of operation” and then go on to extol the various advantages of indirect thermal-fluid process heating over competitive heating methods, such as direct heat, steam and so on. The corollary to that statement, however...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/heat_transfer_media/Troubleshooting-Heat-Transfer-Fluid-Systems_8729.html
December 1, 2011
Thermal fluid systems that both heat and cool are often utilized in batch processes. They are also often found in continuous processes where heating is required at one point in the process and cooling (often for the purpose of heat recovery) is required in a different part of the process. Because these systems utilize the same fluid for both the heating and cooling process, they are collectively referred...
http://www.chemengonline.com/processing_and_handling/thermal_and_energy_mgmt/heat_transfer_media/Thermal-Fluid-Systems-Design-Considerations_8781.html
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