The largest leap towards a sustainable energy balance is arguably not a complete transition from fossil fuels to renewable energy sources but rather energy conservation. At ProHeat, we use in-depth technical knowledge to produce practical insights on energy conservation which can readily be applied to our customer’s process heating requirements.
An Indirect Heating Solution to Reduce CO2 Emission and Improve Efficiency of Gas Distribution Networks
- Features a review of indirect heating technologies, including challenges faced in natural gas preheating applications.
- Presents the design philosophy for the Immersion Tube Thermosyphon Heater (ITTH) and outlines a technical explanation of benefits resulting form two-phase heat transfer.
- The thermal efficiency of the ITTH is compared to a traditional water bath heater showing an improvement from 46% to 90%.
Energy Reports (Jan 2018)
Preheat Technology for Dynamic & Responsive Gas Distribution Networks
- Discusses the role of gas in the establishment of a decentralised, flexible and low carbon power/gas interface and the resulting challenges for gas distribution networks.
- Reviews the resilience of gas network preheat infrastructure and compares existing technology to novel and responsive heater, the Immersion Tube Thermosyphon Heater (ITTH).
- A case study is presented the reduction in overheating losses between a traditional water bath heater and the ITTH.
Network Magazine (Dec 2017)
Driving Performance in Preheating
- Describes the status quo established in the preheater market, highlighting the need for innovation to improve efficiency whilst maintaining reliability.
- Introduces ProHeat as a company introducing a novel technology in the endeavour of reducing life-time cost and improving environmental performance.
- Introduces the Immersion Tube Thermosyphon heater as a preheating solution, benchmarking a prototype’s thermal efficiency at 85%.
Gas International (Sept 2016)
Temperature control optimisation
- The thermal inertia of a heater will dictate its ability to balance heat demand and supply.
- Water based indirect heaters have a large inertia, reducing their ability to maintain constant output temperatures, particularly when facing large load diversity.
- In pre-heat applications, low process temperatures are mitigated by increasing heater set points. In turn, this leads to overheating of process gas and increased fuel consumption.
- Steam based technology concentrates 10 to 25 times more energy per unit mass than water, allowing the design of a much more compact and responsive indirect heater.
- Steam can supply heat on-demand and in the exact amount, achieving much more precise temperature control and ultimately saving energy.
- Temperature control performance from a traditional Water Bath Heater (WBH) and the new Immersion Tube Thermosyphon Heater (ITTH) using low pressure steam were assessed. The contrast in temperature control is apparent under similar operating conditions.
- The ITTH was able to maintain a near constant station outlet temperature, regardless of flow variation, while the WBH saw large temperature deviations from its set point.
- Twenty-five percent of the WBH’s fuel consumption contributed to overheating of process gas, as compared to 1.3% for the ITTH.
- Overheating losses, CO2 emissions and fuel costs are computed relative to an ideal heater, able to maintain a constant 1°C station outlet temperature.
Additional CO2 emissions
Additional Fuel Cost
ITTH 930 kW
WBH 1.200 kW
Improved thermal efficiency in natural gas preheating
While losses associated with older atmospheric burners technology can be reduced with burner upgrades, heat transfer from a dilute energy source such a glycol/water bath often results in poor process control and lower overall efficiency.
ProHeat’s Immersion Tube Thermosyphon Heater (ITTH) offers a desirable combination of efficiency with a simple, reliable design and a number of improvements over traditional indirect heating technology:
- A flexible heating solution, able to adapt easily to rapidly changing gas flows.
- Low maintenance requirements with no moving parts in the process envelope.
- High efficiency with up to 45% fuel savings as compared to traditional technology.
- A cost competitive solution designed using robust materials for a long service life.
Find out more about the ITTH and how it operates here.