PhD Thesis - Energy Systems Research Unit - University of Strathclyde

3.3.2 Steady-state vs. dynamic modelling 1053.3.2.1 Existing dynamic models 1053.3.3 Requirement for a new dynamic model 1063.3.4 Development of the proposed model 1063.3.4.1 The control volume concept 1063.3.4.2 The control volume concept used to model thethermal transients inside the chiller 1083.3.4.3 Finding the state points within the chiller 1113.3.5 Model calibration 1153.3.5.1 Calibration stage 1: Obtaining the cycle highand low pressures in terms of the hot watercircuit inlet temperature 1173.3.5.2 Calibration stage 2: Obtaining the chiller’srefrigerating power output as a function ofwater circuits’ inlet temperatures 1193.3.5.3 Calibration stage 3: Obtaining the total massand the mass weighted average specific heatcapacity of each individual node 1213.3.6 Verification of the proposed model 1233.3.6.1 Inter-model comparison 1243.3.6.2 Comparison with experimental data 1243.3.7 Use in plant networks 1283.4 Variants in plant configuration 1283.4.1 Use of chilled water storage tank 1283.4.2 Use of a SWH system in tandem with microtrigeneration1303.5 Summary of Chapter 3 1323.6 Chapter References 1334. SIMULATION METHODOLOGY AND ANALYSISMETRICS 1384.1 Simulation methodology 1394.1.1 Scenarios investigated 139viii