EVALUATION OF SPATIAL AND TEMPORAL DISTRIBUTION OF PMV WITH CONSIDERING CONTROL AND PERFORMANCE CHANGE OF HVAC SYSTEM

Thermal environment evaluation in office over cooling period with direct cooling system of internal heat gain Part 2

Abstract

 In previous study, indoor thermal environment in occupied zone of direct cooling system of internal heat gain was evaluated by taking the space distribution and time change into consideration. A method that is similar to quasi-coupling simulation of contribution ratio of indoor climate (CRI) and energy-network model was used to realize the calculation of predicted mean vote (PMV). However, the control and performance change of the HVAC system were not involved in previous evaluation, which cannot be ignored. In this study, the control and performance of the four components of the HVAC system, liquid cooling - heat recovery unit (HRU), active chilled beam (ACB), radiation partition (RP) and dry fan coil unit (DFCU) are modeled. Then, with considering control and performance change of the HVAC system, a basic case study is conducted to evaluate the spatial and temporal PMV distribution of occupants. Results showed that the indoor thermal comfort was affected obviously by the operation-controlled strategy of water distribution system of ACB. As well as previous results, the differences of PMV value were smaller and the comfortability rates were higher than those by conventional system.