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Heat powered adsorption systems offer advantages for air conditioning of automotive vehicles in terms of reducing fuel consumption and CO2 emissions. However, published literature shows that developed adsorption systems are bulky and expensive, hence there is no commercial implementation of such systems. Metal organic framework (MOF) material is a new class of adsorbent material that has high surface area, high pore volume, highly tunable structural properties and uniform pore size.
This PhD research project set out to investigate the feasibility of an MOF based adsorption air conditioning system for automotive application. To achieve this, utilising a working pair with high refrigerant adsorption capacity and adsorber bed design with good heat and mass transfer performance was investigated. Therefore, the adsorption characteristics of three water based adsorbents: silica gel RD-2060, SAPO- 34 and CPO-27Ni were experimentally tested using a DVS analyser. Their adsorption characteristics were compared for relative pressure values ranging from 0 to 0.4 applicable in air conditioning systems, the water uptake of CPO-27Ni MOF is higher than that of SAPO-34 and silica gel RD-2060, indicating that the CPO-27Ni is the most promising adsorbent among these three materials. In addition, a finite element model was developed to evaluate and compare the adsorption performance of three different adsorption bed designs: a rectangular finned tube adsorption bed, a honeycomb finned rectangular channel adsorption bed and a helix finned tube
adsorption bed. The rectangular finned tube adsorption bed was found to outperform the other designs, in terms of its water uptake and HCR.
This PhD research project set out to investigate the feasibility of an MOF based adsorption air conditioning system for automotive application. To achieve this, utilising a working pair with high refrigerant adsorption capacity and adsorber bed design with good heat and mass transfer performance was investigated. Therefore, the adsorption characteristics of three water based adsorbents: silica gel RD-2060, SAPO- 34 and CPO-27Ni were experimentally tested using a DVS analyser. Their adsorption characteristics were compared for relative pressure values ranging from 0 to 0.4 applicable in air conditioning systems, the water uptake of CPO-27Ni MOF is higher than that of SAPO-34 and silica gel RD-2060, indicating that the CPO-27Ni is the most promising adsorbent among these three materials. In addition, a finite element model was developed to evaluate and compare the adsorption performance of three different adsorption bed designs: a rectangular finned tube adsorption bed, a honeycomb finned rectangular channel adsorption bed and a helix finned tube
adsorption bed. The rectangular finned tube adsorption bed was found to outperform the other designs, in terms of its water uptake and HCR.
Content:-
ABSTRACT
ACKNOWLEDGEMENTS
CONTENTS
LIST OF FIGURES
LIST OF TABLES
ABBREVIATIONS
NOMENCLATURE
LIST OF PUBLICATIONS
CHAPTER 1: GENERAL INTRODUCTION
ACKNOWLEDGEMENTS
CONTENTS
LIST OF FIGURES
LIST OF TABLES
ABBREVIATIONS
NOMENCLATURE
LIST OF PUBLICATIONS
CHAPTER 1: GENERAL INTRODUCTION
CHAPTER 2: LITERATURE REVIEW
CHAPTER 3: ADSORBENT MATERIALS CHARACTERISATION
CHAPTER 4: FINITE ELEMENT MODELLING FOR THREE ADSORPTION BED DESIGNS
CHAPTER 5: EXPERIMENTAL TEST FACILITY
CHAPTER 6: EFFECT OF OPERATING CONDITIONS ON ADSORPTION COOLING PERFORMANCE
CHAPTER 7: PERFORMANCE OF A TWO-BED SYSTEM FOR AUTOMOTIVE APPLICATION
CHAPTER 8: CONCLUSIONS AND FUTURE WORK
REFERENCES
Author Details
"Baosheng Shi"
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