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1 Technical Presentation on PID _ Heating and refrigeration system using waste heat energy Photo (Author 1) Photo (Author 2) Author 1 Name Author 2 Name Restricted Circulation L&T Technology Services 2017
2 Index Challenge Statement Concept /Scope of Solution Pros and Cons of the solution Detailed Description Technology /background Development Procedure / Methodology Implementation/ Proto/POC Validation / Testing / Analysis Cost /Benefit Results and potential Business Impact for L&T TS Conclusion References Restricted Circulation L&T Technology Services
3 Restricted Circulation L&T Technology Services 2017
4 Challenge Statement To design and develop a heating and refrigeration system using waste heat energy of exhaust gas Restricted Circulation L&T Technology Services
5 Concept / Scope of solution The concept and scope of the project is: To reuse waste heat energy from the exhaust pipes of passenger car vehicles To design a refrigerator for cars whose compressor runs on the recovered waste heat energy To develop a heating system for cars which can be used for heating water during journey To design the system as per industry standards and ensure maximum efficiency of the system. Restricted Circulation L&T Technology Services
6 Pros and Cons of the solution The pros of the solution are: The system uses waste heat energy, which otherwise goes unutilized into the atmosphere No external power source is required to run the system System causes no pollution to the environment Better performance efficiency than other systems of its kind Some challenges encountered with the solution: The idle time period is a little high Restricted Circulation L&T Technology Services
7 Detailed Description Water heated by exhaust pipe Water converted to high pressure superheated steam Steam used to drive a miniturbine which rotates compressor Compressor provides input work to refrigeration system Cooling effect upto 10 C Steam from turbine exit used for heating purpose Water passes through condenser Water is reused and cycle continues Restricted Circulation L&T Technology Services
8 Technology/Background Basic refrigeration cycle or reversed carnot cycle is being used for cooling system The heating system works similar to an ideal rankine cycle Refrigeration cycle details Heating cycle details Evaporator temperature 8 C Superheated steam temperature 1000K Condenser temperature 35 C Turbine exhaust temperature 750K Expansion device Capillary tubes Mass flow rate 0.012kg/sec Input power 62W Steam velocity 52 m/s The exhaust temperature of the pipe is around 1100K- 1300K. This temperature is being utilized to heat water to such a high temperature. Restricted Circulation L&T Technology Services
9 Development Procedure/Methodology The detailed development procedure is given below: Finalization of idea and design Design finalization using 3D modeling Turbine designing Refrigerator and heating system designing CFD Analysis Design Calculations Billing of Materials Prototyping Restricted Circulation L&T Technology Services
10 Implementation and prototype / POC Restricted Circulation L&T Technology Services
11 Implementation and prototype / POC Position of fridge and heater Restricted Circulation L&T Technology Services
12 Validation / Testing / Analysis Runner design runner.sldprt runner cfd Goal Name Unit Value Averaged Value Minimum Value Maximum Value Progress [%] Use In Convergence Delta Criteria GG Av Total Pressure 2 [Pa] Yes GG Av Temperature (Fluid) 1 [K] Yes SG Av Velocity 1 [m/s] Yes Restricted Circulation L&T Technology Services
13 Validation / Testing / Analysis Turbine Fan design Fan specifications No of blades 10 Total lift force 12 N RPM 191 Mass kg Restricted Circulation L&T Technology Services
![sldprt Goal Name Unit Value Averaged Value Minimum Value Maximum Value Progress [%] Use In](/docs-images/87/95439667/images/14-1.jpg "Convergence Delta Criteria GG Normal Force (Y) 1 [N] 0.647616877 0.645724324 0.623266527 0.")
14 Validation / Testing / Analysis CFD Analysis of Fan at attack angle of 25 degree blade wind at 25 degree.sldprt Goal Name Unit Value Averaged Value Minimum Value Maximum Value Progress [%] Use In Convergence Delta Criteria GG Normal Force (Y) 1 [N] Yes Restricted Circulation L&T Technology Services
![sldprt Goal Name Unit Value Averaged Value Minimum Value Maximum Value Progress [%] Use In](/docs-images/87/95439667/images/15-1.jpg "Convergence Delta Criteria GG Normal Force (Y) 1 [N] 01.203915158 0.804277643 0.798882216 1.")
15 Validation / Testing / Analysis CFD Analysis of Fan at attack angle of 20 degree blade wind at 20 degree.sldprt Goal Name Unit Value Averaged Value Minimum Value Maximum Value Progress [%] Use In Convergence Delta Criteria GG Normal Force (Y) 1 [N] Yes Restricted Circulation L&T Technology Services
16 Validation / Testing / Analysis By means of CFD analysis, the lift force on each blade was calculated. The following boundary conditions were used: 1. Density of fluid= 1.2 Kg/m 3 2. Attack angle = Frontal area= m 2 4. Chord= 20mm 5. Span= 35mm Restricted Circulation L&T Technology Services
17 Restricted Circulation L&T Technology Services
18 Validation / Testing / Analysis Torque calculation: T F r where T= Torque on each blade F= Lift force on each blade r= fan radius Total torque= T n where T= torque on each blade n= number of blades= 10 Restricted Circulation L&T Technology Services
19 Validation / Testing / Analysis RPM calculation P 2 NT 60 where P= 100 W ( target output) T= 0.5 N m From the above equation, N was obtained to be 191 rpm. Restricted Circulation L&T Technology Services
20 Validation / Testing / Analysis For the refrigeration system Actual COP= Q W = = 1.61 where Q= refrigeration effect W= Input work from compressor Restricted Circulation L&T Technology Services
21 Cost /benefits S.NO COMPONENT PRICE 1 Refrigerator setup Compressor Inconel for fan Stainless steel for pipes Evaporator and condenser coil 1500 TOTAL Restricted Circulation L&T Technology Services
22 Results and potential Business Impact for L&T TS Key Achievements: Cost of the project is optimal at around INR. First of its kind in the market, which would boost up sales exponentially System is eco-friendly and hence addresses the concern of global warming System is highly versatile as heating system and cooling system is available simultaneously Restricted Circulation L&T Technology Services
23 Conclusion The cost of the entire setup is very optimum and well within the reach of the common people Waste energy is being successfully utilized Design has been successfully validated through CFD analysis with the help of COSMOS in SolidWorks. Restricted Circulation L&T Technology Services
24 References Engineering Thermodynamics by P.K Nag Heat and Mass Transfer by R.C. Sachdeva Internal Combustion Engine by V Ganesan Race Car Aerodynamics by Joseph Katz Restricted Circulation L&T Technology Services
25 THANK YOU Restricted Circulation L&T Technology Services 2017
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