it was really - Mathias Kessler

20
YES I’M ON MY WAY
AND THERE’S NO-
EXCERPT FROM YOUTUBE VIDEO TITLED VIDEO NAME HERE
WHERE ELSE THAT
I’D RATHER BE.”
Compression refrigeration units The compression refrigeration machine is equipped with a mechanical compressor and a restricting
device (e.g. a vaporization valve). A compression and an expansion device are required as well as two heat exchangers connected in circuit
so that a heat exchanger is positioned on either side of the compression and expansion devices. Cold-steam refrigeration machine:
basic circuit Refrigerant steam is drawn into the compressor and compressed (input power W). The refrigerant condenses in the downstream
heat exchanger (condenser). The liquid refrigerant is routed to a vaporization valve, where it is expanded. During expansion the
pressure of the refrigerant decreases, the refrigerant becoming cooler and vaporizing partially. In the second heat exchanger (vaporizer)
the vaporizing refrigerant absorbs heat from the refrigerated chamber (cooling energy/vaporization heat QK). The compressor reabsorbs
the vaporized refrigerant, completing the cycle. Energy in the form of mechanical work must be supplied from outside in accordance
with the second law of thermodynamics for the refrigeration machine to function. The condensation heat given off at the condenser is
the sum of the cooling energy absorbed at the vaporizer, the operating energy, and the normal losses through the cold insulation and the
friction losses. Wendelin Weingartner: If the external temperature at the condenser is too great, i.e. the temperature difference is too
small, then heat can no longer be given off at the condenser. Heat (consisting of the heat removed from the refrigerant +
operating energy) needs to be given off at the condenser. Heat generated by normal working losses and friction losses at the
compressor likewise accumulates in the refrigerated chamber.