Estimation of Heat Load for Air Conditioning System of JMI Library

Refrigeration and air conditioning system covers a wide variety of cooling applications, using both standard and custom-made equipment. Central air conditioning is more reliable to operate for easy operation with a low maintenance cost. Refrigeration and Air-conditioning accounts for a significant portion of the energy consumption in various manufacturing industries (like pharmaceuticals, chemicals, dairy, food etc. ), agricultural& horticultural sectors (mainly cold stores) and commercial buildings (like hotels, hospitals, offices, airports, theatres, auditoria, data processing centers, multiplexes, telecom switching exchanges etc. ). Educational and research institutions also need human comfort, as the population of student community increase year by year. The effective design of central air conditioning can provide lower capital cost, power consumption and improve air purity of a building. This paper establishes the result of cooling load calculations of varying climatic conditions by using CLTD method for a multi-story JMI library which is a part of an institute. Cooling load items such as, lighting heat gain, people heat gain, infiltration and ventilation heat gain can easily be putted to the E 20 MS-Excel program. The E 20 MS-Excel program can also be used to calculate cooling load due to walls and roofs. And results were compared with the standard data given by ASHRAE and CARRIER Fundamental Hand Books, and results are satisfactory. It also seen that comfort air-conditioning generally implies relative humidity in the range of 50 % to 60 % and cooling of room air to about 25C. Industrial process air conditioning and precision air conditioning may require temperatures ranging from 19C to 23C with relative humidity values ranging from 50 % to 60 %.