REFRIGERATING MACHINERY.

Lyttelton Times, Volume LXI, Issue 7222, 23 April 1884, Page 5

REFRIGERATING MACHINERY.

[Per Press Association.] WELLINGTON. April 22. An invention which is claimed to effect a considerable improvement in the present system' of freezing meat, has just been patented by Robert Niedergesass, of Wellington. The invention has for its object three improvements on the present mode of creating cold air. The first consists in the great saving of power caused by the diffusion of cold water into the air compressor, in such a manner as to prevent any rise of temperature during the act of compression; the second consists in freezing the meat at a pressure greater than that of the atmosphere; and the third consists in utilising the heat of the meat, and any heat that finds its way into the freezing chamber, and the heat of any available water or other material that is warmer than the returning air from the chamber. The inventor claims —(1) The compression of air under constant, or even at a decreasing, temperature; (2) the application of freezing under a pressure higher than the atmosphere; and (3) the use of a cylinder, in which the returning expanded air is utilised. Mr Niedergesass has given the subject a good deal of attention, and is convinced that if his invention were substituted for the system in use at the present, a saving of about 90 per cent in coal alone would be effected.