What is the % of reduction CO2 emission using district cooling system compare to individual cooling system?

Question

If we have multiple buildings with each Individual building cooling system consists of chillers, cooling towers, AHU etc and if we would replace all those components with district cooling plant. How much CO2 emission can we reduce yearly? If possible, please help to provide statistics for Malaysia and other countries.

Answer 1

I'm involved with the construction of this type of system.  It's a great system in so many ways.

District cooling plants tend to operate slightly more efficiently than is possible using conventional air conditioning systems because they can incorporate measures like thermal storage in large tanks of cold water and they can do most of their cooling at night and distribute the chilled water during the day.

Another advantage occurs over the equipment life cycle.  If a skyscraper installes a chiller, they are stuck with it almost for the life of the building.  In 40 years time the chiller will be worn out and working innefficiently and technologically obsolete.  There is sure to be better technology on the market.  With district cooling, they can upgrade chillers at any time without disruption to chilled water supply because they have a large number of chillers in a district cooling plant.

Answer 2

Lets see I'm running a 5000 ton york chiller right now

I am producing 5717 tons of cooling and my chiller is using 2919 KW's per hour

but you also have to figure in 4 - 500 hp pumps and 3 cooling tower fans 250 hp each.

But yes on a large scale system you can't beat it, I work on the largest system here in the US Texas UT