2. Thermoacoustic coolers

Unlike engines, chillers need to provide a certain amount of cooling power to cool a given load to a required temperature level. The "thermoacoustic pumping" of heat, described in the article [BE 8 060] Thermoacoustic effect, can be employed, as long as the resulting thermal gradients in the stack do not exceed the critical value. Coolers can be either travelling-wave (TGP: pulsed gas tube) or standing-wave (TAR: thermoacoustic refrigerator ). Compared with motors, [19][20]