TY - JOUR
T1 - Enhancement and Integration of Desiccant Evaporative Cooling System Model under Transient Operating Conditions
AU - Ali, Muzaffar
AU - Vukovic, Vladimir
AU - Sheikh, Nadeem Ahmed
AU - Ali, Hafiz M.
AU - Sahir, M. H
PY - 2014
Y1 - 2014
N2 - Desiccant cooling systems provide new possibilities in air conditioning technology through the use of either solid or liquid sorption air dehumidification. Such systems can be more reliable and environmental friendly than the conventional systems. The focus of current study is to enhance the existing ideal system component models of the desiccant evaporative cooling system (DEC) developed in an equation-based object-oriented modeling and simulation program, Dymola/Modelica to address the real component operation. Initially, the enhanced component models are calibrated and validated through the transient measurements obtained from the real DEC system installation. Afterward, using the validated physical models of individual components, complete system model has been experimentally calibrated and validated. The obtained results are in good agreement with the actual measurements at the both component and system levels. At the system level, in terms of specific enthalpy of supply air, the resulting maximum and minimum root mean square error (RMSE) and mean percentage error (MPE) between the simulated and measured transient performance is 0.96 kJ/kg and 1.53%. The results show that the enhanced system model is able to predict the performance of the real desiccant cooling system with good accuracy. As such, the current paper contributes to the efforts of bringing simulations closer to performance of real systems under building operating conditions.
AB - Desiccant cooling systems provide new possibilities in air conditioning technology through the use of either solid or liquid sorption air dehumidification. Such systems can be more reliable and environmental friendly than the conventional systems. The focus of current study is to enhance the existing ideal system component models of the desiccant evaporative cooling system (DEC) developed in an equation-based object-oriented modeling and simulation program, Dymola/Modelica to address the real component operation. Initially, the enhanced component models are calibrated and validated through the transient measurements obtained from the real DEC system installation. Afterward, using the validated physical models of individual components, complete system model has been experimentally calibrated and validated. The obtained results are in good agreement with the actual measurements at the both component and system levels. At the system level, in terms of specific enthalpy of supply air, the resulting maximum and minimum root mean square error (RMSE) and mean percentage error (MPE) between the simulated and measured transient performance is 0.96 kJ/kg and 1.53%. The results show that the enhanced system model is able to predict the performance of the real desiccant cooling system with good accuracy. As such, the current paper contributes to the efforts of bringing simulations closer to performance of real systems under building operating conditions.
U2 - 10.1016/j.applthermaleng.2014.10.064
DO - 10.1016/j.applthermaleng.2014.10.064
M3 - Article
SN - 1359-4311
VL - 75
SP - 1093
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
ER -