Heat Transfer
Aseptic globe valves for pure steam applications
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 valve types…
Save energy with these laboratory reaction stations
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 synthesis, these “lab-in-a-box” alternatives to…
Cooling Water Outlet Temperature: Evaluating The Best Maximum Value
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…
Heat-transfer expansion tank design
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,…
This steam trap has a durable and efficient design
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 the P46S features a high-tolerance, mirror-finish disc that provides a steam-tight seal,…
These chillers are portable
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 capable of providing variable-capacity output from 10 to 100% by axially separating internal…
This fluidized bath has a built-in dust extraction system
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,…
Challenges for U.S. petroleum refiners
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…
Thermal Integration Of Reboilers
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…
New electric arc furnace for steelmaking
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 input and DRI are supplied during tapping (tilting…