Document 150mpB18OyDyr6LX9J7KvYJEX

POWERS OATA SHEETS Number 186 Figuring Refrigeration Capacity i--10 t--t.i Here's a chart to speed up the calcula tions needed in routine follow-up of re* frigerating-plani performance. To find the actual ton-rate capacity used per ton of ice produced, apply tho following formula, Actual ton rate > 0.8 raa-T) + (W33) + 144 144 x efficiency Where T i the temperature of the brine and < ia the temperature of the water in degrees F. Excmpte: Find the actual ton rate per ton of ice output when brine temper ature is 19.8 T, water temperature is 63.1 F, and plant efficiency 05.5%. Lay a straight edge from the appropriate numbers on the temperature scales to find the intersection on the theoretical ton-rate ecalc. Then lay the straight edge from (his intersection through the efficiency scole to read the answer of 1.471 actual ton rote per ton oi ice output. By John Hyam -- 1.2 \n |sti L-2.1 POWER l.l PO JENNISON STATION, most modem steam plant of New York State Electric & Gas Corporation, to benefilllng from close boilor water level stabilisation, provided by two-element COPES Flowmatic. Adjusted to carTy a higher level on heavy load* than on light, total variation. Is within plus-or-minus one inch. The story is told in Bulletin 463--Boiler Feed Control at WeBtover, Greenidge and Jennison Stations. Writ--your letterhead, please--for a copy. NORTHERN EQUIPMENT COMPANY .181 GROVE DRIVE, ERIE, PENNSYLVANIA rl WiUr (UgtUltn, Paop Opmiimi, Dldtrisllil Vtlftt, Liquid L*l Control*. Rtdiolog V*U* and Daiaparbaitna BRANCH PLANTS: Canada. Cnqland. Ptane* At^naaalaifraa If*/firiara jJ^^JOSjyEVELTQJITRpLWItH^^'.F LO VV/*i AT I C differential valves COPES Differential Valves maintain constant pressure drop across the food wator regulator valvas, rogardlessol changes In pump pressure or line friction losses aoeompanytng wide Quotuations la boiler load. Individually designed tor each installation. Available In eoparalo bodies, as Illustrated, or in combination with the .teed wator regulator valvo bodice pOW| January 1948 LIQUID LEVEL CONTROL Tor control ol water or steam input or output, open or closed vessola. for throttling sleem supply to Quid pumps. Seml-stoel, cast-steel or (orged-stool float chambers, with floats of dif ferent sites and materials to moot Individual needs. The direct* or relay-operated COPES Valvee have low friction, high till, accurate balance, ports designed for each installation. 21