The presentation explains orc for waste heat recovery.Effect of different parameters and thermodynamic analysis has been shown.

1. GOVERNMENT COLLEGE OF
ENGG.,KALAHANDI
PRESENTED BY- DHIRAJ KUMAR SAHOO
REGD. NO-1401110167
EXPERIMENTAL STUDY ON ORGANIC RANKINE
CYCLE(3KW)

2. C0NTENTS-
 KEYWORDS OF THE TOPIC
 INTRODUCTION
 COMPONENTS
 EXPERIMENTAL SETUP
 DESCRIPTION
 THERMODYNAMIC ANALYSIS
 EFFECTS OF PARAMETERS
 CONCLUSION
 REFERENCE

3. KEYWORDS OF THE TOPIC-
 ORGANIC-Compounds which are mainly constituted of
carbon and hydrogen.
e.g.-Ethane(C2H6),Butane(C4H10),Benzene(C6H6)etc.
 RANKINE CYCLE-It is the modification of carnot cycle. This is
currently used in power plants for power generation.
Regeneration and Superheating can also be
implemented to get more power output.

4. INTRODUCTION-
 In order to utilize the waste heat,this cycle can be utilized.
 The working fluids are R141,R134,R245,R290,R11,R12,R600
etc,which is to be forwarded to the expander.
 This is a useful cycle since it converts low grade energy(heat)
to high grade energy(work).

5. COMPONENTS-
 The main parts are
 Evapourator
 Expander
 Condenser
 Pump and Preheater

6. FUNCTION OF EACH PART-
COMPONENT FUNCTION
Evapourator Supplies the latent heat and vapourises
the working fluid.
Expander Converts enthalpy to mechanical work.
Condenser Lowers the temperature and converts the
vpaourised fluid to liquid.
Pump and preheater Increases the pressure and supplies heat.

7. PREVIEW OF ORC-

8. EXPERIMENTAL SETUP-
 The whole setup consists of
 Heating loop
 ORC loop
 Cooling loop
 Measurement devices

9. BLOCK DIAGRAM-

10. Description-
 Heating loop- An electric heater utilizing conductive oil is
meant for it, having capacity of 40KW.
There are four electrical heating rods.
The flow of conductive oil is controlled by axial pump.
 ORC loop- It consists of a plunger pump,an evapourator,a
scroll type expander and a condenser.
The working fluid is R245 because of its better efficiency
and environmental performance.

11.  Cooling loop- There is a cooling tower installed at roof top.
It is responsible to extract heat from condenser and rejects
to the environment.
The needle valve is used to adjust the mass flow rate of
cooling water.
 Measurement Devices-
PARAMETER DEVICE
Temperature Thermocouple
Pressure Piezo-resistive pressure transmitter
Mass flow rate GPIS050(Flow transmitter)
Rotational speed Tachometer

12. TEMPERATURE-ENTROPY PLOT-

13. NOMENCLATURE-

14. THERMODYNAMIC ANALYSIS-
 From T-s plot , we can get-
Heat transfer rate of evapourator = m(h1-h6) =Qevap.
Expander power output = m(h1-h2)
Pump shaft power = m(h6-h5)
 Expander shaft power = (2π/60)×Mexp. × Nexp.
Isentropic efficiency of expander = ήise.exp. = (h1-h6)/(h1-h2s)
Generator mechanical efficiency = ήise.gen. = Wshaft. exp./Welectr. Exp.
 Pump shaft power = m(h6-h5)
Isentropic efficiency of pump = ήise.pump = (h5s-h5)/(h6-h5)
Mechanical efficiency of pump = ήmech.pump. = m(h6-h5)/Welectr.pump

15.  Back work ratio is the ratio between pump consumption to
electricity output.
Mathemetically, BWR =Welectr.pump / Welectr.expander.
Thermal efficiency = ήth =(Wsh. - Wpump.)/Qevap.
System Generating efficiency = ήele. =(Wel.exp. – Wel.pump)/ Qevap

16. EFFECTS OF PARAMETERS-
 The parameters which were examined are-
 Pressure Drop
 Degree of Superheating
 Condenser temperature
 Pressure drop is the difference in pressure of evapourator and
condenser.
 Degree of superheating refers to the difference of temperature of
working fluid at the inlet of expander and the saturated vapour
temperature, at same pressure.

17. EFFECT OF PRESSURE DROP-

18. EFFECT OF PRESSURE DROP-

19. EFFECT OF DEGREE OF SUPERHEATING-

20. EFFECT OF DEGREE OF SUPERHEATING-

21. EFFECT OF CONDENSER TEMPERATURE-

22. EFFECT OF CONDENSER TEMPERATURE-

23. CONCLUSION-
 From the experiment, the behaviour of expander , pump and
condenser were examined under varying condition of
parameters.
 The objective was to get the condition for maximum power
output.
 The experiment was concerned to get at least 3KW power
considering errors in measurement.

24. REFERENCE-
 C.P. Jawahar , R. Saravannan , J.C. Bruno , A. Coronas
 S. peng , H. hong , H.G jin , Z.F. wang.
 www.google.com
 www.researchgate.net
 Refrigeration and Air conditioning by C.P Arora
 www.nptel.ac.in
 www.scihub.cc
 www.sciencedirect.com

25. ANY QUERIES?