I D
× COMMENTARYCOVER STORYIN THE NEWSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUS
Focus on Valves
    A new motorized control valve for the semiconductor…
NEW PRODUCTS + Show More

Comment PDF Heat Transfer

Heat Exchangers: Designing for Super-critical Fluid Service

By James R. Lines |

Working with supercritical fluids poses challenges when designing heat exchangers. Some practical tips and precautions are presented here Industrial applications involving fluids at high pressure — pressure above the critical pressure of a particular fluid — are increasing in number. This is due to the beneficial properties of supercritical fluids (SCFs) or simply due to very high pressures required for certain applications. Examples include supercritical CO2 acting as a solvent in an extraction process, supercritical water for waste treatment via an oxidation process (Figure 1), supercritical nitrogen for an enhanced-oil-recovery process or supercritical methane in compressed natural-gas service. Table 1 provides a list of the critical points for a number of different fluids [1]. The phase diagram for CO2, the most commonly used SCF, is shown in Figure 2. Figure 1. This heat exchanger is used for supercritical water oxidation service. Both hot and cold fluids operate above critical pressure Graham[/caption] Figure 2. The phase diagram for carbon dioxide illustrates the location of the critical point[/caption] Proper design of heat transfer equipment requires greater care and a deeper understanding of supercritical fluid properties,…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Metering gas in biogas plants
Wet process analyzer for FPD and solar cell manufacturing for semi-conductors
Fluidized bed drying and cooling for temperature-sensitive polymers and plastics
CoriolisMaster: The SmartSensor solution
The Big 6 flowmeter technologies: Where to use them and why

View More