Impact analysis of indoor heat gain spatial diverse characteristics on air conditioning system design and capacity in office building

Indoor heat gains from occupant, lighting and office equipment is important part of air conditioning cooling load in office. By investigation, occupant and electrical power density are different in different zone with same function; it means that the heat gain density of occupant and electric has randomness on space. The randomness makes it difficult to decide reasonable indoor heat gain density when designing. Thus, designers often use larger indoor heat gain density value to calculate load and choose air conditioning equipment capacity. This method is one of the factors which lead to chiller oversized. Describes the spatial randomness as a distribution function by investigation and induction. The distribution function of multi-storied is more centralized than single-storied. Consequently, the indoor heat gain density which is used to calculate chiller capacity is different from that of air handling equipment. This method can avoid chiller excessive capacity and part of air handling equipment is not enough.