Handbook for heating and ventilating engineers . of ammonia gas from one place or condition to an-other, &ay from a condition of low temperature and pres-sure where the absorbing stream of water would be cool, tv REFRIGERATION 295 a condition of high temperature and pressure, where theg-as would be liberated by simply heating the water. It willbe noticed that the gas has been transferred as a liquidwithout a compressor or any compressive action, by pump-ing a stream of water of approximately one-four hundredand fiftieth of the volume of the gas transferred. This, inthe abstract, is the method
Handbook for heating and ventilating engineers . of ammonia gas from one place or condition to an-other, &ay from a condition of low temperature and pres-sure where the absorbing stream of water would be cool, tv REFRIGERATION 295 a condition of high temperature and pressure, where theg-as would be liberated by simply heating the water. It willbe noticed that the gas has been transferred as a liquidwithout a compressor or any compressive action, by pump-ing a stream of water of approximately one-four hundredand fiftieth of the volume of the gas transferred. This, inthe abstract, is the method employed in the absorptionsystem to convey the ammonia gas from the relatively lowtemperature and pressure of the evaporator to the hightemperature and pressure at the entrance of the absorption system, when closely compared in prin-ciples of operation to the compression system, differs onlyin one respect, namely, the absorption system replaces thegas compressor by the strong and weak liquo>r cycle. As ^s>^o«;:«;^*«j,. ?QUOR cyclC Fis:. 141. shown in Fig. 141, both sys-tems have arrangements ofcondenser, expansion valveand evaporator that are iden-tical, hence the part of thecycle through these need notbe considered. The problemof completing the cycle fromevaporator t o condenser,however, is solved quite dif-ferently in the two the compression system(upper diagram) the evapo-rator delivers the expandedgas to the compres-sor, from which,under high pres-sure and tempera,ture, it is deliveredto the condenserand the cycle iscompleted. In theabsorption system(lower diagram)the evaporator de-livers the expandedgas to an absorber,in which the gascomes in contactwith a spray of so-called weak liquor, 296 HEATING AND VENTILATION consisting- of water containing about 15 to 20 percent, of aniiydrous ammonia. Tlie weak liquor absorbsthe ammonia gas through which the liquor is sprayed and col-lects in the upper part of the absorber as strong liquor, contain
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventila, bookyear1913
