Heat Pipe Heat Exchanger - Comfit Enersav.pptx

A product brief regarding Heat Pipe Heat Exchangers developed by Comfit Enersav Pvt Ltd

1. Recovering Challenging Residual Heat Energy with Heat Pipe Heat Exchanger technology www.comfitenersav.com

2. 15+ years experience in manufacturing Founder of Comfit & Valves Pvt. Ltd., - The only Indian company approved by NPCIL for instrument hook ups - The only Indian company approved by EIL in 4 different categories of instrument hook ups - Manages a team of 200+ employees Bachelors in Chem. Eng. from UDCT Mumbai (2005) Masters in Chem. Eng. from IIT Kanpur (2007) Worked 10 years with Shell, - Design and Optimization of Energy Systems - Commissioning & Start up and Operations Management of Multi Billion Dollar Mid stream and Up stream projects. Worked in 5 different countries. Ganesh Bhat Technical Director Jitendra Jain Managing Director

3. Increasing energy costs due to increasing demand and constraints on fuel supply. Utilities costs can be up to 40% of the annual Operational Cost (OPEX) of a plant Improving energy efficiency and reducing CO 2 emissions is required. India targets net zero by 2070. Low hanging energy recovery projects are being executed in plants across India, like condensate recovery, variable speed drives, etc. Cleanest form of energy is recovery of the Residual Energy that is otherwise being wasted in the plant. Recovering energy from difficult streams is not being tackled yet , like - Flue gases vented between 140 o C to 180 o C - Purified product streams - Corrosive and dirty fluids Recovering energy from these difficult streams will significantly improve energy efficiency and reduce CO 2 emissions. Opportunity Issues

4. Heat Pipe Heat Exchangers (HPHE) Heat Source In FRONT VIEW Heat Source Out Heat Sink In Heat Sink Out HPHE are highly efficient devices used to transfer heat from one medium to another with minimal temperature difference. They utilize the phase change of a working fluid within the heat pipe to achieve high thermal conductivity and effective heat transfer.

5. The effectiveness (Thermal Efficiency) of HPHE is higher than conventional HE (like Shell & Tube, Fin Tube Hes ) as Heat Pipes use Phase change for heat transfer This results in 15 – 25% lower heat transfer area & a lower footprint for HPHEs compared to conventional HE Main Benefits of Comfit Enersav HPHE Conventional HE 1 Higher Effectiveness HPHE Lower Effectiveness    

6. Main Benefits of Comfit Enersav HPHE Conventional HE 2 Cold End Corrosion Limited by Cold End Corrosion Mitigates Cold End Corrosion For fired heaters, conventional HEs are limited by Cold End Corrosion and Pitting Corrosion due to acid gas condensation. This is the reason why flue gases are vented at 140 o C to 180 o C HPHE Pitting Corrosion HPHEs do not experience Cold End Corrosion or Pitting Corrosion. This enables HPHE to extract 20 o C to 40 o C heat which is otherwise wasted. Heat Source in a HPHE does not face any Cold End

7. Main Benefits of Comfit Enersav HPHE 3 Conventional HE Cross contamination HPHE No Cross Contamination In conventional HEs failure of a tube will result in cross contamination of the heat source and heat sink. HPHE design ensures isolated chambers for heat source and heat sink, preventing cross contamination. This has significant implications for Process Safety and for heat recovery from Purified Process streams, corrosive and dirty fluids. Glass Tube APH Heat Sink Out Heat Sink In Heat Source In Heat Source Out Algae In Cooling Tower HPHEs have Isolated chambers for for the two process fluids

8. Main Benefits of Comfit Enersav HPHE Conventional HE 4 HPHE Thermal Stress in Tube Bundle of Shell & Tube HE Long Life and Easy Maintenance Possibility of reduced lifetime and challenging maintenance Clogged Tube Bundle in Shell & Tube HE Thermal stress causes buckling of tube bundle in Conventional HEs. Repair, maintenance and cleaning needs specialist teams and long turn-around time. Heat pipes are free to expand vertically and hence do not experience thermal stress. Cleaning and maintenance can be done by inhouse team and in-situ resulting in very short turn-around time. Heat pipes are made from minimum Schedule 10 pipes providing greater corrosion allowance.

9. Sustainability Integrating heat into the process leads to maximum thermal energy utilization and enables highest CO 2 emission reduction.

10. Economics of HPHEs For Fired Heaters: Typical Return of Investment for heat recovery are, - Coal / Briquette fired systems where steam cost is ~ 1.2 – 2 Rs/kg steam, the ROI is 17 – 22 months. - Gas / LDO / LSHS fired systems where steam cost is ~ 3 – 4 Rs/kg steam, the ROI is 14 – 16 months Current Installations Aether Industries, Surat : HPHE has been supplied to Aether Industries for a Process Safety application. Based on its performance, Aether has given a repeat order for the HPHE Ratnatris Healthcare, Ahmedabad : HPHE has been supplied for flue gas heat recovery from a 5 t/h Gas fired boiler On going Project Discussions : We are currently in final stages of discussion for heat recovery with Aarti Industries, Amoli Orgaincs , Aurobindo Pharma, Laurus Labs.

11. Connect With Us To know more about our Heat Pipe Heat Exchanger Technology and to determine how much Waste Heat can be recovered from your unit please connect with us Regd. & Sales Office Comfit Enersav Pvt. Ltd. Survey No. 23/1, Part - II, Village : Laxmipura , Ahmedabad - Mehsana Highway, Post : Nandasan - 382705 Ahmedabad, Gujarat, India Mobile: [phone] [email protected] [email protected]