ammonia

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Synonyms for ammonia

a water solution of ammonia

a pungent gas compounded of nitrogen and hydrogen (NH3)

References in periodicals archive ?
Comparison of Different Refrigerants Refrigerant Toxicity Flammability GWP ODP R-744 (carbon dioxide) A 1 1 0 R-717 (ammonia) B 2L 0 0 R-290 (propane) A 3 5 0 R-22 (HCFC) A 1 1760 0.034 R-134a (HFC) A 1 1300 0 R-410A (blend of A 1 1920 0 HFCs R-32/R-125 at 50/50) R-600a (isobutane) A 3 20 0 R-1234yf (HFO) A 2L <1 0 Table 2.
(3) REFRIGERANT GLOBAL WARMING OZONE DEPLETION ASHRAE SAFETY POTENTIAL (GWP) POTENTIAL (ODP) CLASSIFICATION R-22 1,810 0.040 A1 R-404A 3,922 0 A1 R-507A 3,985 0 A1 R-407A 2,107 0 A1 R-410A 2,088 0 A1 R-407F 1,825 0 A1 R-1270 3 0 A3 R-290 (Propane) 3 0 A3 R-744 (Carbon 1 0 A1 Dioxide) R-717 (Ammonia) <1 0 B2L
The primary refrigerants considered included R-404A, R-134a, R-32, R-1234yf and ammonia (R-717).
On the other hand, if the refrigerant is soluble in water (like R-717), then high humidity can absorb some of the gas, having a minor effect on the amount required to reach LFL [lower flammability limit].
For comparison, Figure 7b shows the results by Jabbour (2004) for R-32, R-143a (C[H.sub.3]C[F.sub.3]), R-717 (N[H.sub.3]), and R-152a (C[H.sub.3]CH[F.sub.2]).
List of Refrigerants Used to Develop Equation 2 and Figures 2 and 3 R-11 R-23 R-115 R-141b R-227ea R-338mccq R-C270 R-12 R-32 R-116 R-142b R-236ea R-600 R-C318 R-13 R-41 R-123 R-143a R-236fa R-600a R-E125 R-13I1 R-50 R-124 R-152a R-245ca R-717 R-E134 R-14 R-113 R-125 R-170 R-245fa R-744 R-E245 R-22 R-114 R-134a R-218 R-290 R-1270 R-E245mc
The Hasegawa MODU-PAK is suitable for use with R-717 and R-22 and capacities ranging from 16 TR to 120 TR at -40[degrees] F ET and -95[degrees] F CT.
The third was a cascade system with R-290 (propane), R-717 (ammonia), R-404A or R-134a on the high pressure side (all alternatives were analyzed) chilling a pumped C[O.sub.2] secondary loop on the MT side and C[O.sub.2] DX on LT side.
Table 1: Comparison of Refrigerant Properties ASHRAE 34 BV LFL Flammability cm/sec %v/v Classification (in/sec) Propane 3 39 2.1 R-290 (15.4) Ammonia 2L 7.2 16.7 R-717 (2.8) R-32 2L 6.7 14.4 (2.6) R-1234yf 2L 1.5 6.3 (0.59) MIE HOC mJ MJ/kg (Btu) (Btu/lb) Propane 0.25 50.4 R-290 (2.36 x [10.sup.-8]) (21,713) Ammonia 300 18.6 R-717 (2.84 x [10.sup.-4]) (8,013) R-32 100 9.6 (9.47 x [10.sup.-5]) (4,135) R-1234yf 5000 10.7 (4.73 x [10.sup.-3]) (4,609)
The table shows that ammonia (R-717) is the only substitute for R-22, having zero GWP.