Measurement Values (IMAGE)

Swiss Federal Laboratories for Materials Science and Technology (Empa)

Measurement Values

Caption

The measurement values show steady increases in all three of the new coolants and foaming agents. Depending on the air currents and wind directions, high concentrations of these even reached the Jungfraujoch in places -- whereas in Dübendorf very high concentrations could be observed constantly. The diagram also shows that HCFC-1233zd(E) occurs at roughly the same concentrations both in Dübendorf and on the Jungfraujoch. This indicates that the foaming agent is used in tiny amounts or not at all in Europe -- but its likely source is in North America or Asia

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Empa

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