Heat Transfer
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…
Temperature Effects for High-velocity Gas Flow
Guidelines are presented to better understand the temperature profiles of high-velocity gases In high-velocity gas flows, such as those that may occur within the discharge piping of a pressure-relief or depressurization valve, the temperature experienced at the wall of the…
Bulk Solids: Operating Direct-Contact Heat Exchangers
Bulk solids are frequently used as reactants, catalysts or products in chemical process industries (CPI) operations. Often, they must be heated or cooled so that they can be handled safely or processed at a desired temperature. Traditionally, heat transfer to…
Burner Inspection and Maintenance
Burners are mechanical devices that are utilized for mixing proper quantities of fuel and air, and also for maintaining a stable flame inside fired equipment. Burners are critical components that must be periodically maintained to ensure the reliability of fired…
Safe Sampling of Heat-Transfer Fluids
Collecting representative samples of heat-transfer fluid for routine quality checks falls short of the goal if safety or the environment is compromised. While users should consider their systems’ unique design features in consultation with their safety and health experts, incorporating…
Advanced Control Methods for Combustion
Fuel combustion in engines, power plants, boilers, furnaces and other equipment provides energy for transportation, heating, electricity and goods manufacturing. Optimizing efficiency while lowering pollutant emissions is the main goal of industrial combustion, and reaching those goals, coupled with climate-change…
Heat or cool fibrous sludge with this tube-in-tube heat exchanger
This new tube-in-tube heat exchanger is designed for heating and cooling sludge that contains fibers and particles, making this equipment ideal for use with most kinds of wastewater sludge. The heat exchanger consists of a single tube mounted inside an…