Comparison of Cooling Cost Effectiveness Between Unitary and Central Cooling System
Air conditioning is a basic need in building spaces to provide indoor comfort. This research describes the evaluation of cooling cost effectiveness between unitary and central chiller cooling system. Operational cost involving initial, energy and maintenance for both systems was analysed througho...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2005
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/6035/1/FK_2005_26.pdf |
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| Summary: | Air conditioning is a basic need in building spaces to provide indoor comfort. This
research describes the evaluation of cooling cost effectiveness between unitary and
central chiller cooling system. Operational cost involving initial, energy and
maintenance for both systems was analysed throughout the life span period. A case
study was carried out where cooling load requirement of all conditioned spaces was
determined using cooling load temperature difference 1 cooling load factor method.
Currently in-use unitary system data was gathered and an all-water type central
cooling system was proposed as an alternative. Main equipment capacity of the
central system was designed based on cooling load and appropriate heat equation.
The study shows that the central system is the better option for high air conditioning
application of more than 60 kW heat gain. Although central system first cost is
almost double than that of unitary system, it has the advantage of much higher life
span. Cumulative cost analysis for the case study indicates that the investment of
central system provides a payback period of eight years. In addition, the central
system also contributes towards energy conservation by offering lower total power
input of its equipment. |
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