Load on the air conditioning system in a room with non-round-the-clock working day in the warm season

Moscow State University of Civil Engineering (MGSU) National Research University, Moscow, Russia

^* Corresponding author: emal@list.ru

Abstract

Calculations of the maximum load on the cooling units of air conditioning systems are important, as they determine the installation capacity of an air conditioner. The load value is influenced by the share of the radiant component in the sum of heat gains coming into a room and making up the load, and the internal thermal stability of the room. Herewith, as the theory of thermal stability states, the higher the internal resistance, the smoother the load peaks, since the heat that comes to an enclosing structure surface is more easily deviated into heavier building materials forming the room interior finishing. In addition, the maximum load on the part-time operating room cooling devices depends on the degree of the room overheating before the beginning of the working day. Moreover, when a room has a minor interior finishing, the heat coming to the inner surfaces of the enclosing structures does not move into the enclosing structure, but raises its temperature. Calculations of the room daily periodic unsteady thermal mode were performed by the method of finite differences in Cartesian coordinates according to an implicit scheme. Provision has been made of calculations of the rooms with different internal heat resistance, the windows of which are facing one of the cardinal directions: South, East, West. The performed calculations have shown the feasibility of heavy finishing for rooms with a high proportion of incoming radiant heat.