Thermic fluid heaters are heating equipment used in various industries where heat transfer is the primary requirement for processes, rather than pressure. They are efficient and effective in heating applications that require high temperatures and low pressures, such as the food and beverage, chemical, and pharmaceutical industries. Thermic fluid heaters use high-viscosity oil as a heating medium and are preferred when pressure is not desired in a process, and using a boiler for high-temperature services would be costly. These heaters can improve process consistency, reduce downtime, and increase profitability. Thermodyne Engineering Systems is a manufacturer and supplier of thermic fluid heaters and heating systems. Their product, "Fluidtherm," is a thermic fluid heater that can heat various fluids, including thermal oil, petroleum oil, Therminol, and water. They have supplied numerous heating systems to clients in India and exported to other companies. Thermic fluid heaters find applications in industries such as food processing, rubber and plastics, publishing and printing, metal fabrication, textile, paper, natural gas processing, crude oil extraction and processing, chemical, plywood and laminates, and confectionery. The design of a fluidtherm thermic fluid heater typically consists of two concentric coils, with the inner coil acting as a radiation zone and the outer coil acting as a convection zone. The convective heat transfer between the flue gas and the fluid is enhanced by the higher velocity of the flue gas between the coils and the outer shell. The number of passes in the heater can be three or four, with the efficiency increasing with a higher number of passes. Thermic fluid heaters like Fluidtherm can achieve a maximum temperature of 350°C, although higher temperatures can be achieved as long as they do not exceed the auto-ignition temperature of the fluid. Deaerator and expansion tanks are also part of the system, with the expansion tank accommodating the increased volume of fluid due to temperature rise, and the deaerator tank venting out air from the fluid to improve heat transfer. Thermic fluid heaters can utilize various fuels, including solid fuels like wood, coal, petcoke, and rice husk; liquid fuels like light and heavy oils; and gaseous fuels like natural gas and liquefied petroleum gas. The advantages of thermic fluid heaters include high capacity heating, fully automatic operation to maintain the desired temperature, high system efficiency resulting in reduced operating costs, suitability for high-temperature heating up to 300°C, ease of installation, the ability to operate on a variety of fuels, failsafe design with dependable safety instruments, rugged construction, long thermic fluid and heater coil life due to high flow rate, and reliable after-sales service. The capacity of Fluidtherm heaters ranges from 1 Lac Kcal/hr to 50 Lac Kcal/hr.

1. Thermic Fluid Heaters
A brief overview of thermic fluid heaters and their usage in various
industries

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Thermic fluid heaters are
used in industries where
heat transfer is the
primary requirement for
processes
They are preferred when
pressure is not desired
and using a boiler would
be costly
High-viscosity oil is used as
a heating medium in
thermic fluid heaters
They are efficient and
effective in heating
applications requiring high
temperatures and low
pressures
Introduction to Thermic Fluid Heaters

3. Applications of Thermic Fluid
Heaters
● Thermic fluid heaters find usage in food
and beverage industry
● They are used in chemical industry for
heating processes
● They are popular in pharmaceutical
industry for their effectiveness
● Thermic fluid heaters can be used in
various other industries as well

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Thermic fluid is heated in a
closed loop system
The heated fluid then
circulates through heat
exchanger to transfer heat to
the process fluid
A pump is used to circulate
the thermic fluid in the
system
Thermic fluid heaters require
less maintenance than boilers
Working Principle of Thermic Fluid Heater

5. Advantages of Thermic Fluid
Heaters over Boilers
● Thermic fluid heater are cost effective for
high-temperature services
● They are easier to install and operate than
boilers
● Thermic fluid heaters require less space
● They provide uniform heating in the
process fluid
● They can operate at low pressures

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Disadvantages of Thermic Fluid Heater
The viscosity of the fluid needs to be
checked regularly
The initial cost of thermic fluid heaters is
higher than that of boilers
They require continuous monitoring to
avoid overloading or overheating
Leaks in the system can cause fluid
losses

7. Maintenance of Thermic Fluid
Heater
● Regular inspection and cleaning of the
system is necessary
● The thermic fluid needs to be drained and
refilled periodically
● The heat transfer surfaces need to be
cleaned to avoid clogging
● The system should be checked for leaks and
repaired as soon as possible

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Thermic fluid heaters are
efficient heating
equipment for various
industries
They have several
advantages over boilers
and find usage in high-
temperature services
Regular maintenance and
monitoring of the system
is necessary to avoid
downtime
Thermic fluid heaters
provide a cost-effective
solution for heating
processes
Conclusion

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