Paper 3: Application of Factory-Made Air-Conditioning Units

The paper states why air conditioning is necessary particularly in office blocks in cities, where noise, dust and heat from office machinery together with solar heat gain through large glass areas are experienced. The relatively small addition to building costs in incorporating air conditioning is shown. The distinction between air handling, ventilation and air conditioning is defined and the constituent parts of a complete air-conditioning unit are enumerated. The requirements in terms of fresh air needs, temperature and relative humidity for the normal applications of air-conditioning units are tabulated. A comparison of the main categories of air-conditioning equipment is made, dealing with high and low velocity as well as special laboratory type units. A typical performance specification is also given together with data sheets for collecting the necessary design data and cost comparisons. The paper concludes with a discussion on system design incorporating factory-made equipment and literature references.