Last June we carried out a test to cool the Metro station platforms using injected cold air working with a pump system. This test was part of our general policy to optimise energy resources to cut operating costs and maximise passenger comfort.

At that time, no such experiment had been carried out in the Metro and so, as a prior step to evaluating the experience, we decided to establish a pilot scheme for the cooling system at Sagrada Família on the 2nd Line-5 platform. We installed an air-conditioning system that was essentially made up of a gas-powered water-cooling plant, an air condenser, an air-conditioner and other associated equipment (pumps, ventilators, etc.) and provided it with the energy that theoretical studies made beforehand had found to be necessary.

Following on from that pilot test, we will now look into improving the air-conditioning installation and extending it to other stations in the Barcelona Metro network. The main aim is to achieve an optimum temperature level that is pleasant for passengers while they wait for their trains at a cost that allows the system to be extended to all the stations in the Metro network

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