Therefore a power of just Qel=38.4w is applied into the refrigeration circuit vai the compressor. Of the applied electric power Pel only about 16% is used. The compressor has a very low efficiency in the operating point. The low efficiency of the compressor occurs mainly because it is only operated at about 10% of its rated power. The measured values used for the example calculation were recorded under certain laboratory conditions. Thermal calculation are always directly dependent on the environmental conditions. The achievable refrigeration and condenser capacities are therefore highly dependent on the prevailing operating conditions.