Mondial House - The Design The Cooling Pods |
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| EXIT | Design Tour: | TD 1 | TD 2 | TD 3 | TD 4 | | ||||||||
| TD 5 | The Cooling Pods | The Standby Power | Power Control | Other Services | Postscript | | ||||||||
Although there were 6 pods, the ones at each end were not used as only 4 engines (and hence radiators) were actually installed. The Standby Power As an operational building, Mondial was equipped with a full capacity standby power set up:
Large exchanges (and other buildings) usually have an 11kV (11,000 volts) power supply and/or generating set up. This is mainly for economic reasons as there is less power loss in distribution, at a higher voltage, and therefore smaller sized cables can be used. Power is directly related to voltage and current: power (watts) = voltage (volts) x current (amps). [W= V* A] If you increase the voltage, the current will go down, but the power produced will remain the same. So with a low current we can have smaller cables. This is why the national grid network operates at 132kV and the 'supergrid' between 275kV and 400kV. Other Services Also in the basement were the diesel oil fuel tanks. There was a total storage capacity of 800,000 litres, which was enough reserve to keep the building powered for several months if necessary. In practice they never needed to run for this length of time. The building's central cooling plant was located in the basement and the condensers were water cooled. The cooling towers were located on the 8th floor roof area.
An Openreach engineer who was involved in the building closure programme adds... "My pictures of the generators got lost. A great shame as these were impressive machines. There were four of these beasts, each being nearly the size of a single decker bus. Looking inside the crankcase revealed the underside of the 16 cylinders, each cylinder being the size of a household bucket. The whole of subfloor 2 south side was a power station in itself. Also in my travels snooping around during recovery, subfloor 2 north side held two water storage tanks (I am assuming water) each being the size of a two storey detached house! As for the air con and chiller equipment....!!!! It seemed that nothing in Mondial was small." |
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Light-Straw. Page last updated
June 2015 revision.
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