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…
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…
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,…
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,…
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…
Webinar: Heat Transfer Optimum Performance in Thermal Fluid Heating Systems: The importance of heat flux and film temperature Date: November 6, 2008 | Time: 11am EST In circulating thermal-fluid heating systems, the rate of heat transfer is typically controlled to…
Pumps Centrifugal pumps with cast or forged steel casings are typically appropriate for systems with large flowrates Positive displacement pumps frequently can handle smaller flowrates of less than 100 gal/min Sealless pumps (canned motor or magnetic drive) avoid the installation…
UOP LLC (Des Plaines, Ill.; www.uop.com) will form a joint venture (JV) with Ensyn Corp. (Wilmington, Del.; www.ensyn.com) to offer technology for the production of fuel oil and transportation fuels from second-generation biomass, such as forest and agricultural residues. Ensyn…
Consol Energy Inc. (Pittsburgh, Penn.; www.consolenergy.com), the nation’s largest producer of bituminous coal, and Synthesis Energy Systems Inc. (SES, Houston, Tex.; www.synthesisenergy.com) have formed a joint venture to build a coal-to-gasoline plant near Benwood, W.Va., close to Consol’s Shoemaker complex.…
Rentech, Inc. (Los Angeles, Calif.; www.rentechinc.com) has produced its first run of jet fuel from its Fischer-Tropsch (F-T) product demonstration unit (PDU) in Commerce City, Colo. The plant produces a synthesis gas of hydrogen and carbon monoxide by steam-reforming of…