HVAC SYSTEMS - HFT Stuttgart

IX
TABLE OF CONTENT
3.4 COMPONENT AND SYSTEM MODELS...................................... 92
3.4.1 ABSORPTION CHILLER MODEL AND VALIDATION ..........................92
3.4.2 SOLAR THERMAL SYSTEM MODELS............................................98
3.5 SYSTEM SIMULATION RESULTS............................................. 99
3.5.1 GENERAL INFLUENCES OF THERMAL SYSTEM DESIGN AND
OPERATIONAL CONDITIONS OF THE ABSORPTION CHILLER ...........99
3.5.2 INFLUENCE OF DYNAMIC BUILDING COOLING LOADS..................105
3.5.3 ECONOMICAL ANALYSIS ..........................................................108
3.6 CONCLUSIONS .................................................................. 116
4. MODEL BASED CONTROL STRATEGY OPTIMISATION OF
SOLAR DRIVEN ABSORPTION COOLING SYSTEMS..........118
4.1 INTRODUCTION.................................................................. 118
4.2 SCOPE AND METHODOLOGY OF WORK................................ 119
4.3 DESCRIPTION OF THE ANALYSED SOLAR COOLING SYSTEM .. 120
4.3.1 GENERAL SYSTEM DESCRIPTION .............................................120
4.3.2 SYSTEM DIAGRAM WITH COMPONENTS OF THE SYSTEM
CONTROL...............................................................................124
4.3.3 GENERAL DISCUSSION OF POSSIBLE CONTROL OPTIONS...........125
4.3.4 CONTROLLABLE PARAMETERS OF THE CHILLII® SOLAR COOLING
SYSTEM.................................................................................127
4.4 ANALYSIS OF THE OVERALL SYSTEM EFFICIENCY FOR DIFFERENT
CONTROL STRATEGIES ...................................................... 129
4.4.1 INTRODUCTION .......................................................................129
4.4.2 DYNAMIC SIMULATION MODEL AND VALIDATION.........................130
4.4.3 Analysed Control Strategies.................................................133
4.4.4 SIMULATION RESULTS AND DISCUSSION ...................................135
4.4.5 FURTHER OPTIMISATION POTENTIALS ......................................138
4.4.6 CONCLUSIONS........................................................................142