RISK-BASED MODELLING OF AIR CONDITIONING SYSTEMS

摘要

The selection and design of air conditioning systems in Hungary are based on a determined modelling state. In the last decade this was a safe enough basis for the management of systems. As a result of the changes in the microclimate, however, there has been a major increase in summer temperatures. Taking into account this fact and the need to develop the earlier deterministic modelling techniques we chose to focus on risk-based modelling for which outdoor air databases found in the related literature are not suitable. Using the attributes of the Air Quality Laboratory at the Department of Building Service Engineering we have developed a measuring method,computer-based data processing and analyser programme to determine the density and distribution functions of outdoor air temperature and enthalpy as probability variable. With another mathematical model the operation of air conditioning system can be tracked in an "h-x" diagram and the distribution and density functions of cooling enthalpy change can be determined, leading to risk-based modelling. The risk based modelling is used to evaluate the results of outdoor air conditions (air temperature and humidity) measuring of 2003 and 2004.