Heat Transfer
A booster bed for Circulating Fluidized-bed Combustors
The efficiency of circulating fluidized-bed (CFB) combustors can be significantly increased by substituting conventional bed material with an ilmenite-based bed material, according to researchers at Chalmers University of Technology (Gothenburg, Sweden; www.chalmers.se). Conventional CFB boilers use silica sand to evenly…
Streamline turnarounds with faster catalyst cooling
A new process technology from Aggreko North America plc (Houston; www.us.aggreko.com) aims to make turnarounds at petroleum refineries more cost-effective by decreasing the time required for catalyst cooling. The catalyst materials used for refining operations, such as hydrotreating, hydrocracking and…
Pipe Insulation: Finding the Optimal Thickness
Avoid tedious numerical calculation by using this quick, shortcut method Insulated pipes are important in many applications in the chemical process industries (CPI). When it comes to the insulation itself, the two main questions are: which material should be used;…
What Is Thermal Degradation and How Is It Measured?
Choosing the right heat transfer fluid is the first step to enhancing the efficiency of your applications and the performance of your equipment. The second is understanding how to keep that fluid performing at its maximum capacity – so you…
Improve Efficiency with Better Evaporation and Drying Equipment
For every application, there’s an evaporator or dryer that can boost performance In today’s economy, chemical processors must deliver high product quality and uniformity while maintaining high yield and low production costs in order to be successful. For this reason,…
How and When to Change Your Heat Transfer Fluid
When it comes to protecting the performance of your applications—from the extremes of solar energy production to pharmaceuticals and throughout the multitude of processes in between—choosing the right heat transfer fluid is crucial, but it’s not the only step. Ensuring…
Hot-oil heat-tracing systems for heat transfer
Hot-oil heat-tracing systems use liquid heat-transfer fluids to reliably deliver heat to process fluids. Heat tracing may be used in place of jacketed equipment, often at lower cost and with lowered risk of cross-contact. The use of liquids reduces many…
Thermal Design Guidelines for Optimizing Shell-and-Tube Heat Exchangers
Ensuring optimal performance of shell-and-tube heat exchangers requires knowledge of the controlling fluid, correct exchanger geometry and configuration, as well as proper fluid placement Satyendra Kumar Singh Simon India Ltd. Optimizing the thermal design of a shell-and-tube heat exchanger…
Evaluate Heat-Exchanger Tube-Rupture Scenarios Using Dynamic Simulation
Applying dynamic simulation models to tube-rupture scenarios can help ensure more accurate sizing and hazard assessments Tube rupture in heat exchangers is an extremely serious issue in the chemical process industries (CPI; Figure 1). Heat-exchanger tube-rupture scenarios can be evaluated…
Phase-change slurry
Researchers from the Fraunhofer Institute for Environmental, Safety and Energy Technology (Umsicht; Sulzbach-Rosenberg; www.umsicht.fraunhofer.de) and RWTH Aachen University (both Germany; www.rwth-aachen.de) have developed a new phase-change material (PCM) trade-named CryoSolPlus. The PCM is a dispersion of solid paraffin beads and…