DETERMINATION OF NPLV COEFFICIENT ON CITIES OF PONTIANAK, KUPANG, AND BANDUNG BY DEGREE HOURS METHOD AND RTS COOLING LOAD CALCULATIONS METHOD

• Main Author: ASIDO MAULIATE S (NIM : 13113033), RUBEN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/24119
• Institution: Institut Teknologi Bandung

Nowdays, there is no denying that almost all buildings need to be conditioned for the occupants to feel comfortable. One of the central cooling systems is known as chilled water system which uses chiller to cool the circulated water that conditioned the air in the room. <br /> <br /> <br /> Designers must choose the chiller wisely. They sometimes misunderstood that chillers only operate in full-load conditions where in fact, most chillers are now have variable speed motors to adjust with the loads. So, they tend to choose chillers based only on full-load ratings despite a chiller have different ratings on different load profiles. This differences may result in a more expensive annual energy cost. <br /> <br /> <br /> The main goal of this research is to develop an equation to provide designers not only with chiller full-load design efficiency, but also with chiller part-load efficiency. The equation to obtain part-load efficiency in certain local weather condition is called Non-standard Part Load Value (NPLV). <br /> <br /> <br /> In this research project, the NPLV equation of several cities in Indonesia (Bandung, Pontianak, and Kupang) will be obtained by Degree-Hours Method and Radiant Time Series cooling load calculations. The results were compared to actual load profile of a chiller that was operated at Building X. At the end, there is a recommendation to use Air Cooled Centrifugal Chiller by Thermal Care for the most efficient type of chiller to be operated in all three cities, based on their NPLV values.