Solar organic Rankine cycle system integrated with Phase Change Materiel Storage

声明

ABSTRACT

ACKNOWLEDGEMENT

Contents

List of Figures

List of Tables

Nomenclature

1 Gradual development in Solar Thermal Power Generation System

1．1 Introduction

1．2 Development of ORC

1．3 Coupling of ORC with solar energy

1．4 Recent research in thermal power generation systems using ORC

1．4．1 OrganicRankine cycle

1．4．2 Solar collectors coupling with ORC

1．4．3 Thermal energy storage

1．5 Innovative Features of the Dissertation

References

2 Effect of working fluids on the performance of a novel direct vapor generation solar organic Rankine cycle system embedded with phase change material storage

2．1 System configuration

2．2 Thermodynamic modeling

2．3 Results and discussions

2．3．2 Effect of critical temperature on optimum evaporation temperature and maximum thermal emciency at a given solar radiation

2．3．3 Effect of critical temperature on collector efficiency at given evaporarion temperature and solar radiation

2．3．4 Effect of critical temperature on the thermal efficiency of the system at given evaporation temperature and solar radiation

2．3．5 Efficiency comparison between solar ORCs with DVG and HTF

2．4 Conclusion

References

3 Modeling of organic Rankine cycle emciency with respect to the equivalent hot side temperature

3．1 Derivation of the equivalent hot side temperature

3．2 New models for the ORC

3．2．2 The ratio of the pump power and the expander power (a-value)

3．2．3 New 0RC efnciency model by approximating TECST and a-value

3．3．2 Error contributed by the appmximation of TECST

3．3．3 Error counteraction by the approximation of a-value and TECST

3．4 Results and discussion

3．4．1 Innuence of the equivalent hot side temperature on the ORC efficiency under different conditions

3．4．2 Comparison among the equivalent hot side tenlperature and boiling point temperature，critical temperature，Jacobs number，and Figure of Merit

3．4．3 The quantitaive relationship between ORC efficiency and the equivalent hot side temperature

3．5 Case study

3．6 Conclusion

References

4 Modeling，simulation，and comparison of phase change material storage based direct and indirect solar Organic Rankine cycle systems

4．1 Introduction

4．1．1 System configurations

4．1．1 Climatic Data of Islamabad-Pakistan

4．2 Thermodynamic modeling

4．2．1 Solar radiation

4．2．2 Solar collectors

4．2．1 Phase change material storage

4．3 Operation and control of both systems

4．4 Validation of the Computational Model

4．5 Organic Ihnkine cycle

4．6 Results and Discussions

4．6．1 Performance of the hottest week

4．6．2 Performance of the coldest week

4．6．3Performance over the month

4．7 Conclusion

References

5 Thermodynamic comparison between novel and conventional heat pipe evacuated tube collectors used for solar organic Rankine cycle application，an experimental study

5．1 Introduction

5．1．1 Design layout of HPETC

5．2 Thermodynamic modeling of HPETC

5．3 A thermodynamic model of organic Rankine cycle

5．4 Resuns and discussions

5．4．1Validation of the computational model

5．4．2 Effect of solar radiations on the collector and overall thermal efficiency of solar ORC system

5．4．3 Parametric analysis

5．5 Conclusion

References

List of Publications included in the dissertation