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HOT OIL LIQUID PHASE HEATING
and
HTF SYSTEMS


Electric HTF heating module

Electric HTF Heaters
Thermal Fluid Heating Systems
Hot Oil & HTF Heating Processes


Thermal Fluid Plant Parameters

HTF heating and hot oil systems can be worked either side of atmospheric pressure, although pressurised installations allowing operation above their normal saturation temperatures are more complex than for steam - partly through need to inhibit oxidation of the working medium. Even so, a synthetic HTF or thermal oil heater can run at 300 deg.C under normal pressure, whilst saturation pressure for dry steam at that temperature is around 85 barg. No thermodynamic pressure is induced where the fluid vapour pressure remains below atmospheric, and engineering costs are much-reduced if systems are to operate only under gravity head. Generally speaking, electric calorifiers for synthetic fluid and hot oil heating would fall within SEP classification of the PED and are not CE marked.

Thermal Fluid Heaters

Dove Thermal Engineering has built fired- and unfired HTF heaters for Therminol and Dowtherm synthetic fluids and Shell Thermia hot oil systems. We have successfully worked Solutia T66 at temperatures to 340 deg.C under atmospheric pressure - as for our Klieverik thermo-bonding calendering machine installation (see our Gallery page). Our shell-and-tube pattern electric calorifiers have been configured both as skid-mounted and installed systems. The isometric shows a modularized pair of electric HTF heaters packaged as drop-in replacements for an earlier gas-fired plant.

Pipework Design

Although carbon steel is to be preferred for hot oil heating and thermal fluid plant operations, we have designed, stressed, built and commissioned pressurised systems in other materials by request. Thermally-induced movement in carbon steel is lower, and properties retention much superior. Our method for pre-tensioning pipe support systems enables quick and accurate installation.


Typical Capacity and Workscope:


Liquid phase heating plant for International Automotive Components

Electric thermal oil heater installation for Sigma Technologies

Pressurized HTF systems rectification for Midland Oil Refinery

Multiple HPHW, LPHW and hot oil heating installations

Thermal fluid heating plant for Tiflex Limited

HFT heating plant & equipment for Flint Ink


Dove Thermal Engineering Limited, Uttoxeter, ST14 8QX

Telephone: 01889 569933