Elementary Mechanical Refrigeration a Simple And Non Technical Treatise
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26, 1905.
CAPACITY OF REFRIGERATING MACHINES 133 gives 3. 88, the number of cubic feet of gas that must be actually displaced per ton. Assuming that the compressor has a displace- ment efficiency of 80 per cent the apparent displacement per ton will be 3. 88 -. 80 = 4. 85 cubic feet. * APPROXIMATE NOMINAL CAPACITY OF COMPRESSORS Dividing the constants of equations [4] and [5] by 5 (see foot- note) gives equations [9] and [10], which will be found convenient in arriving at the approximate nomina...l capacity of a compressor when its dimensions and speed of operation are known.
[9] Tons = (fin 0. 000181806 [10] Tons = d 2 PS 0. 00109081 Substituting values as above, = 19X19 X38 X45 X0. 000181806 = 112. 23 tons. = 19 X 19 X285 X0. 00109081 = 112. 23 tons.
The above equations give approximate results only, and only in the special case of standard conditions and approximately 80 per cent compressor displacement efficiency. To find the capacity of a compressor in the general case in which it is operated at other back and head pressures, the cooling effect per cubic foot actual displacement must be determined in each case by equation [8].
What to read after Elementary Mechanical Refrigeration a Simple And Non Technical Treatise?
You can find similar books in the "Read Also" column, or choose other free books by Fred Elwood Matthews to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
26, 1905.
CAPACITY OF REFRIGERATING MACHINES 133 gives 3. 88, the number of cubic feet of gas that must be actually displaced per ton. Assuming that the compressor has a displace- ment efficiency of 80 per cent the apparent displacement per ton will be 3. 88 -. 80 = 4. 85 cubic feet. * APPROXIMATE NOMINAL CAPACITY OF COMPRESSORS Dividing the constants of equations [4] and [5] by 5 (see foot- note) gives equations [9] and [10], which will be found convenient in arriving at the approximate nomina...l capacity of a compressor when its dimensions and speed of operation are known.
[9] Tons = (fin 0. 000181806 [10] Tons = d 2 PS 0. 00109081 Substituting values as above, = 19X19 X38 X45 X0. 000181806 = 112. 23 tons. = 19 X 19 X285 X0. 00109081 = 112. 23 tons.
The above equations give approximate results only, and only in the special case of standard conditions and approximately 80 per cent compressor displacement efficiency. To find the capacity of a compressor in the general case in which it is operated at other back and head pressures, the cooling effect per cubic foot actual displacement must be determined in each case by equation [8].
What to read after Elementary Mechanical Refrigeration a Simple And Non Technical Treatise?
You can find similar books in the "Read Also" column, or choose other free books by Fred Elwood Matthews to read onlineMoreLess
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