Product Digest - Heat Transfer
A heat exchanger made of stainless steel works at extreme temperatures and pressures
The AlfaNova plate heat exchanger is offered as an alternative to brazed plate exchangers.Typical applications. include refrigeration systems that use ammonia refrigerants or other cooling media that is corrosive to copper, district heating systems that use corrosive water, tap water systems and sanitary applications. Made of stainless steel, this heat exchanger is constructed using a bond technique that ensures the durability to withstand industrial processes that require extreme pressures and temperatures.
Appeared In Issue: October 2006
Alfa Laval
www.alfalaval.com
Software for spiral heat exchangers is added to this suite
The latest addition to Xchanger Suite 5.0 is the Xspe 5.0 component for rating and simulating spiral heat exchangers. The suite is also made more functional for designing, rating and simulating heat exchangers with the added support of the Cape-Open Thermodynamic Interface Version 1.0. —an international standard for interfacing physical property and unit operation modules to compliant process simulators, such as HYSYS and Aspen Plus. The suite’s components for various types of heat exchangers — e.g., shell-and-tube (Xist) plate-and-frame (Xphe), and air-cooled (Xace) exchangers, as well as fired heaters, economizers and ancillary software for tube-vibration analysis — work together, incorporating native interfaces with process simulators to create one model.
Appeared In Issue: October 2006
Heat Transfer Research, Inc.
www.htri.net
Miniature tube-in-tube heat exchangers are offered in three sizes
These tube-in-tube sample-cooler heat exchangers are geared for applications involving high pressure, low flow and high differential temperatures. All models are made of Type 316L stainless steel with seamless tubes, and feature all-welded construction. Three standard models range in sizes from 0.50-in. to 1.00-in. outer tube dia., and from 0.25-in. to 0.50-in. inner tube diameters.
Appeared In Issue: October 2006
Exergy
www.exergyllc.com
Here’s a different twist on heat exchangers
Marketed as an alternative to conventional shell-and-tube designs, the Twisted Tube heat exchanger is recommended for applications that require increased heat transfer with either fewer shells or a smaller exchanger. Key to the its design are helix-shaped tubes arranged in a triangular pattern, which eliminates the need for baffles. In lieu of baffles, each tube is supported by adjacent tubes, while fluid swirls freely along its length. The novel configuration, which is also recommended for retrofit bundles or exchangers, boasts lower installed costs and extended run time between cleanings.
Appeared In Issue: October 2006
Koch Heat Transfer Group
www.kochheattransfer.com
When the process is a very cold one, use a synthetic heat-transfer fluid
A replacement for silicone and d-limonene, Paratherm CR cryogenic heat-transfer fluid has an extremely low freeze point (below –120°C). The fluid's low 10-cP viscosity at –88°C (20 cP at –96°C) enables significant efficiency gains at lower temperatures. And unlike silicone-based fluids, the CR fluid poses no containment or cleanup issues. Typical applications for Paratherm CR include fine-chemical processes, pharmaceutical active-ingredient production, secondary coolant systems, continuous process applications, lyophilizers and environmental test chambers.
Appeared In Issue: October 2006
Paratherm Corp
http://www.paratherm.com
For liquid-phase heat transfer, use this synthetic organic fluid
Dowtherm RP heat-transfer fluid, a diaryl alkyl, is aimed at applications that require liquid-phase heat transfer. It can be used in nonpressurized systems and is pumpable to 32°F (0°C). Unlike other low-pressure fluids — including partially hydrogenated terphenyls and dibenzyl toluene fluids — RP fluid degrades primarily to low molecular-weight products. This characteristic reduces the need to remove high molecular weight material from the system, resulting in longer fluid life, reduced fluid makeup requirements and less system downtime.
Appeared In Issue: October 2006
Dow Chemical
www.dow.com
Use these heat exchangers as intercoolers or aftercoolers
Made rugged for demanding day-to-day operations, CPK shell-and-tube heat exchangers have removable bundles to prevents fluid intermixing and allow for tube expansion. Applications include heating and cooling electrolytes, boiler blowdown, intercoolers and aftercoolers. These heat exchangers are available with a variety of options, including a materials of construction, components and nozzle orientations.
Appeared In Issue: October 2006
ITT Standard
www.ittstandard.com