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District cooling is centralized cooling plant for several buildings. Large scale chillers should bring efficiency for energy consumption. The real question is how large is large enough to implement district cooling?
We work with district cooling sizing for one project in tropical site, Indonesia. There are four first buildings at stage 1. Simulation results show this. The target for this simulation to find the best chiller efficiency for some scenario.
Not everybody is understand about the number, here if we convert to money language. Lets talk about 0.43 KW/TR. The “conventional efficiency close to (lets assump) 0.52 or standard to 0.6. If we have 1000 TR then if we run 0.43 cost per hour is around 752k and 0.52 is 910k. Maybe the calculation is wrong but the savings up to 300 million rupiah per year.
Benefit of district cooling is flexibility of chiller selection to get best efficiency. The number can be higher if we compare district cooling to smaller selection for building.
But how about investment cost comparison. If district cooling save you 500 million per year and you need to invest 10 billion more, finance guys will say no. It is not easy to calculate everything but here the breakdown (as our experience).
Variable | District Cooling | Conventional Chiller |
chiller plant | ✅ 100% lower | 100% higher |
pump and installation | can be higher | ✅ should be lower |
utility space | ✅ can be lower regarding to flexibility. We can put the chillers into dead zone area | should be higher even district cooling needs special space for cooling plant. |
ㅤ | ㅤ | ㅤ |
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As result we compare with two another projects. First project is real district cooling close to Jakarta and second one is chiller plant between four buildings.
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Lets back to our first case, there are another options
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