Evaporative Cooler. for Closed Circuit Operation. Permanently Good Cooling. Brochure di 13e

Transcription

1 Evaporative Cooler for Closed Circuit Operation VK Brochure di 13e Operation of a Closed Circuit Cooler The which is to be cooled, primary circuit, fl ows via an inlet in the top header into a coil-system and leaves it at the bottom through a manifold. The is then available to cool a load (e.g. condenser, automatic injectionmouding machine for plastic processing, etc.). Because a closed circuit is used, which of course, has to be provided with an expansion tank, there are no losses in the primary circuit and the is always clean, preventing deposits or corrosion. During the re- of the primary circuit, the external surface of the coil, housed in the closed circuit cooler, must be sprayed with from the secondary circuit. Fresh air, blown in from below, simultaneously and in counterfl ow with the sprayed, heats and becomes saturated in contact with the and with the wetted coil, and fl ows out at the top. Re-cooled of the secondary circuit collects in the pan, and is recycled for the spraying function. Because a certain quantity of is evaporated and also a certain portion is bled-off (for this purpose, all units are equipped with an automatic bleed off device), fresh must be supplied through a ball valve. Nevertheless, the saving is considerable compared with conventional, and generally amounts for a fi gure up to 85 % 96 %. Any scaling, up to a thickness of 1 mm, forming on the external surface of the coil, and this in fact can be largely avoided if suitable treatment of the secondary and correct adjustment of the bleed fl ow is carried out, have virtually no effect on the performance of the equipment, as a result of the increased surface area. It is possible to clean a coil using chemicals (obtainable from specialist fi rms). Application Closed circuit coolers are especially advantageous in situations where a machine requires clean which does not form deposits nor is corrosive. Any ordinary tower for open circuit can be replaced by a closed circuit cooler. More space and a higher price are, however, inevitable, but it`s superior performance with low maintenance cost make it most attractive for the user. Permanently Good Cooling 5/19 E. W. Gohl GmbH Pfaffenhäule 28 D Singen Tel. +49() Fax +49() info@gohl.de

2 Table 1 Technical Data Centrifugal fan selected for an external pressure of: to 4 pa 4 to 8 pa Number of fans Unit size Nominal (with a correction factor of k 1 = 1, and the nominal quantity) Q N Nominal fl o w r a t e (primary circuit) k 2 = 1, G N Attached pump of secondary circuit E-Motor Air volume absorbed power fan revolutions E-Motor (15 min -1 ) sound pressure at 3 m absorbed power fan revolutions E-Motor (15 min -1 ) sound pressure at 3 m absorbed power fan revolutions 8 to 13 pa E-Motor (15 min -1 ) sound pressure at 3 m kw kg/h kw m 3 /h kw min -1 kw db(a) kw min -1 kw db(a) kw min -1 kw db(a) / ,75 52, ,1 6 1, 126 1,5 61 1, ,5 61 8/ , , 1 1,5 61 1,1 17 1,5 62 1, ,5 62 8/ , ,1 14 1,5 62 1,3 19 1,5 63 1, , / , ,2 77 1,5 62 1,3 83 1,5 63 1,4 88 2, / , ,3 82 1,5 63 1,4 87 2,2 64 1,5 91 2, / , ,5 86 2,2 64 1,6 91 2,2 65 1,7 94 2, / ,1 15 2,6 9 3, 64 2,7 93 4, 64 2,9 96 4, 65 16/ ,1 18 3, 96 4, 65 3,1 99 4, 65 3,3 14 4, 66 16/ , ,4 11 4, 66 3,6 14 5,5 66 3,8 11 5, / ,1 16 3, ,5 66 4, 82 5,5 66 4, , / ,1 16 4, 82 5,5 67 4,2 85 5,5 67 4,4 88 5, / ,1 16 4,2 85 5,5 68 4,4 88 5,5 68 4,6 94 5, / ,2 2 3,3 47 4, 69 3,7 5 5,5 69 4,1 53 5,5 7 33/ ,2 26 3, ,5 7 4, ,5 7 4, , / , ,6 56 5,5 71 4,9 59 7,5 71 5,3 63 7, / ,2 26 5, 48 7,5 7 5,3 51 7,5 7 5,7 54 7, / , , ,5 71 6,3 54 7,5 71 6, , 72 45/ , , 55 11, 72 7, , 72 8, 61 11, 73 52/ ,2 31 6, , 71 7,2 5 11, 71 7, , 72 52/ , , , 72 8, , 72 9, 56 11, 73 52/ , , , 73 1, , 73 1, , 74 77/ ,2 42 9, , 72 1, , 72 1, , 73 77/ ,2 42 1, , 73 1, , 73 11, , 74 77/ ,2 42 1, , 74 11, 47 15, 74 11, , 75 2/33/ , 4 6, , 71 7,4 5 11, 71 8, , 72 2/33/ , 412 7, , 72 8, , 72 9, , 73 2/33/ , 422 9, , 73 9, , 73 1, , 74 2/45/ , 52 1, 48 15, 72 1, , 72 11, , 73 2/45/ , , , 73 12, , 73 13, ,5 74 2/45/ , , 55 18, , , , 61 18,5 75 2/52/ , 62 13, , ,2 5 18, , ,5 74 2/52/ , , , , 54 22, 74 18, 56 22, 75 2/52/ , ,6 55 3, 75 2,4 57 3, 75 21,4 59 3, 76 2/77/ , 84 18, , 74 2, 436 3, 74 21,4 45 3, 75 2/77/ , 84 2, 436 3, 75 21, 46 3, 75 22,2 47 3, 76 2/77/ , 84 21,2 46 3, 76 22, 47 3, 76 23, 49 3, 77 3/45/ ,2+3, 78 15, 48 18, , , , , 74 3/45/ ,2+3, 84 17, , 74 18, , 74 2,1 57 3, 75 3/45/ ,2+3, , 55 3, 75 22,8 58 3, 75 24, 61 3, 76 3/52/ ,2+3, 93 2,4 48 3, 74 21,6 5 3, 74 23,1 52 3, 75 3/52/ ,2+3, ,3 52 3, 75 25,5 54 3, 75 27, 56 3, 76 3/52/ ,2+3, , , 76 3, , 76 32, , 77 3/77/ ,2+3, , , 75 3, , 75 32, , 76 3/77/ ,2+3, 126 3, , 76 31, , 76 33, , 77 3/77/ ,2+3, , , 77 33, 47 37, 77 34, , 78 4/77/ x3, , x22, 76 4, 436 2x3, 76 42,8 45 2x3, 77 4/77/ x3, 168 4, 436 2x3, 77 42, 46 2x3, 77 44,4 47 2x3, 78 4/77/ x3, ,4 46 2x3, 78 44, 47 2x3, 78 46, 49 2x3, 79 5/77/ x3,+2, , ,+37, 77 5, 436 3,+37, 77 53,5 45 3,+37, 78 5/77/ x3,+2,2 21 5, 436 3,+37, 78 52,5 46 3,+37, 78 55,5 47 3,+37, 79 5/77/ x3,+2, , 46 3,+37, 79 55, 47 3,+37, 79 57,5 49 3,+45, 8 6/77/ x3, , x37, 77 6, 436 2x37, 77 64,2 45 2x37, 78 6/77/ x3, 252 6, 436 2x37, 78 63, 46 2x37, 78 66,6 47 2x37, 79 6/77/ x3, ,6 46 2x37, 79 66, 47 2x37, 79 69, 49 2x45, 8 Selection advice: Units with 5 as last number low absorbed power Units with 7 as last number require less space at lower initial cost 2

3 absorbed power 13 to 18 pa fan revolutions E-Motor (15 min -1 ) sound pressure at 3 m kw min -1 kw db(a) Permissible (primary circuit) maximum kg/h minimum kg/h Surface area m 2 Coilsystem Water in the coil kg Overall dimensions (with connections the units are 25 mm longer) Length mm Width mm Height mm Weights empty weight ~ shipping weight operating weight level = 23 mm max. weight level up to overfl ow Empty weight kg Operation weight kg max. weight kg Weight kg Weight and dimensions of largest single part Length mm Width mm Height mm 1, , , , , , , ,5 92 2, ,6 94 2, , ,8 99 2, ,1 1 4, ,5 17 4, , , 116 5, , , ,7 92 5, ,9 1 7, , , , , ,8 66 7, ,2 58 7, ,2 6 11, , , , , , , , , , , , , , , , , , , , , , , ,4 6 18, , 64 22, , , , , ,6 62 3, ,8 48 3, ,4 49 3, , 516 3, , , ,6 6 3, ,5 64 3, ,9 55 3, , , , , , , , , , , ,6 48 2x3, ,8 49 2x3, , 516 2x3, , 48 3,+45, ,5 49 3,+45, , 516 3,+45, ,4 48 2x45, ,2 49 2x45, , 516 2x45,

4 Table 2 Capacity tables for the most popular conditions Cooling medium For operating conditions which you can t find in table 2 the unit size must be calculated with correction factors k 1, k 2 and the nominal Q N of table 1. Unit size 8/5 8/6 8/7 12/5 12/6 12/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,9 5,1,1 34,7 6,,1 38,9 6,7,2 44,5 7,7,2 5,8 8,7,3 55,7 9,6, ,2 6,2,1 41,5 7,1,2 46,2 8,,2 52,6 9,,3 59,7 1,3,4 65,2 11,2, ,3 7,3,2 48,2 8,3,2 53,5 9,2,3 6,6 1,4,3 68,6 11,8,5 74,8 12,9,7 5K ,4 8,3,2 54,9 9,4,3 6,8 1,5,4 68,6 11,8,4 77,4 13,3,6 84,2 14,5, ,5 9,4,2 61,6 1,6,3 68, 11,7,5 76,6 13,2,5 86,3 14,8,7 93,8 16,1, ,6 1,4,3 68,3 11,7,4 75,3 13,,6 84,6 14,6,6 95,2 16,4,9 13,3 17,8, ,7 11,5,3 75, 12,9,5 82,6 14,2,7 92,7 15,9,7 14, 17,9,1 112,9 19,4, ,3 4,5,1 35,7 5,1,1 41,5 5,9,1 47,8 6,9,2 52,7 7,6, ,7 4,8,1 39,2 5,6,1 44,1 6,3,2 5,6 7,3,2 57,9 8,3,3 63,5 9,1,4 6K ,8 5,8,1 46,9 6,7,2 52,4 7,5,2 59,7 8,6,2 67,9 9,7,3 74,2 1,6, ,7 6,8,1 54,5 7,8,2 6,6 8,7,3 68,7 9,8,3 77,8 11,2,4 84,9 12,2, ,9 7,7,2 61,2 8,8,2 67,9 9,7,3 76,7 11,,4 86,7 12,4,5 94,5 13,5, ,2 8,5,2 67,1 9,6,3 74,2 1,6,4 83,7 12,,4 94,5 13,5,6 12,8 14,7, , 4,8,1 45,4 5,6,1 51,2 6,3,2 58,7 7,2,2 67,1 8,2,3 73,7 9,1,3 7K ,2 5,7,1 53,1 6,5,1 59,4 7,3,2 67,8 8,3,2 77,1 9,5,3 84,4 1,4, ,4 6,4,1 59,9 7,4,2 66,7 8,2,3 75,8 9,3,3 86, 1,6,4 93,9 11,5, ,6 6,,1 39,8 6,8,2 44,4 7,6,2 5,6 8,7,2 57,5 9,9,4 62,8 1,8, ,8 7,,1 46,5 8,,2 51,7 8,9,3 58,6 1,1,3 66,3 11,4,5 72,4 12,4, ,2 7,9,2 52,4 9,,3 58,1 1,,4 65,6 11,3,4 74,1 12,7,6 8,7 13,9,8 5K ,2 9,,2 59,1 1,2,3 65,3 11,2,4 73,6 12,7,5 83, 14,3,7 9,2 15,5, ,3 1,,3 65,8 11,3,4 72,6 12,5,5 81,6 14,,6 91,8 15,8,8 99,8 17,2, ,4 11,1,3 72,5 12,5,5 79,8 13,7,6 89,7 15,4,7 1,7 17,3,1 19,3 18,8, ,5 12,1,4 79,2 13,6,6 87,1 15,,8 97,7 16,8,8 19,6 18,8,11 118,9 2,4, ,1 4,6,1 37,5 5,4,1 42,3 6,1,1 48,6 7,,2 55,6 8,,2 61,1 8,8, ,2 5,6,1 45,2 6,5,1 5,6 7,2,2 57,7 8,3,2 65,6 9,4,3 71,8 1,3,4 6K ,4 6,5,1 52, 7,4,2 57,9 8,3,3 65,7 9,4,3 74,5 1,7,4 81,4 11,7, ,6 7,4,2 58,7 8,4,2 65,1 9,3,3 73,7 1,6,3 83,4 12,,5 9,9 13,, ,7 8,3,2 65,4 9,4,3 72,4 1,4,4 81,7 11,7,4 92,2 13,2,6 1,4 14,4, ,8 9,1,2 72,1 1,3,3 79,7 11,4,5 89,7 12,9,5 11,1 14,5,7 19,9 15,8, ,8 5,4,1 5,6 6,2,1 56,7 7,,2 64,8 8,,2 73,8 9,1,3 8,8 9,9,4 7K , 6,1,1 57,4 7,,2 64, 7,9,2 72,8 8,9,3 82,7 1,2,4 9,4 11,1, ,2 6,9,1 64,1 7,9,2 71,3 8,8,3 8,8 9,9,3 91,5 11,2,4 99,9 12,3,6 Unit size 16/5 16/6 16/7 26/5 26/6 26/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,2 14,5,8 93,3 16,,11 1,2 17,2,14 141,4 24,3,29 154, 26,5,37 161, 27,7, ,6 16,8,11 17,9 18,6,14 115,8 19,9,18 162,6 28,,37 176,9 3,4,48 184,9 31,8, , 19,1,13 122,6 21,1,18 131,4 22,6,23 183,9 31,6,47 199,9 34,4,6 28,8 35,9,72 5K ,5 21,4,16 137,2 23,6,22 147,1 25,3,28 25,1 35,3,57 222,8 38,3,73 232,7 4,, ,9 23,7,2 151,9 26,1,27 162,7 28,,34 226,4 38,9,68 245,8 42,3,88 256,6 44,1 1, ,4 26,,23 166,6 28,7,31 178,3 3,7,4 247,6 42,6,81 268,8 46,2 1,3 28,5 48,3 1, ,8 28,3,27 181,3 31,2,37 194, 33,4,46 268,9 46,3,94 291,8 5,2 1,2 34,5 52,4 1, ,3 11,7,5 9,3 12,9,7 97,3 13,9,9 138,4 19,8,2 151, 21,6,26 157,9 22,6, ,4 13,8,7 16,8 15,3,1 114,8 16,5,13 162,2 23,3,27 176,7 25,3,35 184,8 26,5,41 6K ,4 16,,1 123,3 17,7,13 132,4 19,,17 186,1 26,7,34 22,5 29,,44 211,7 3,3, ,5 18,1,12 139,7 2,,16 149,9 21,5,21 21, 3,1,43 228,4 32,7,55 238,6 34,2, , 2,1,15 154,4 22,1,2 165,5 23,7,25 231,3 33,1,51 251,3 36,,66 262,5 37,6, ,7 21,7,17 167,2 24,,23 179,2 25,7,29 249,9 35,8,59 271,4 38,9,75 283,4 4,6, ,9 13,7,7 124, 15,2,1 133,3 16,4,13 188,4 23,1,27 25,2 25,2,34 214,6 26,4,41 7K ,9 15,6,9 14,4 17,3,12 15,8 18,5,16 212,3 26,1,33 231, 28,4,43 241,5 29,7, ,3 17,2,11 155,1 19,1,15 166,4 2,4,19 233,5 28,7,39 254, 31,2,51 265,4 32,6, ,3 16,2,1 14,2 17,9,13 111,9 19,3,17 157,3 27,1,35 171,2 29,4,45 178,9 3,8, ,7 18,5,13 118,9 2,4,17 127,5 21,9,22 178,5 3,7,44 194,1 33,4,57 22,8 34,9, ,4 2,5,15 131,7 22,7,21 141,2 24,3,26 197,1 33,9,53 214,2 36,8,68 223,7 38,5,81 5K ,9 22,9,18 146,4 25,2,25 156,8 27,,32 218,4 37,6,64 237,2 4,8,82 247,6 42,6, ,3 25,2,22 161,1 27,7,3 172,5 29,7,38 239,7 41,2,76 26,2 44,8,97 271,6 46,7 1, ,8 27,5,26 175,8 3,2,35 188,1 32,4,44 26,9 44,9,89 283,2 48,7 1,14 295,5 5,8 1, ,2 29,8,3 19,5 32,8,4 23,8 35,1,51 282,2 48,5 1,2 36,1 52,7 1,31 319,4 54,9 1, , 13,3,7 13,1 14,8,9 11,9 15,9,12 156,9 22,5,25 171, 24,5,33 178,8 25,6, ,1 15,5,9 119,6 17,1,12 128,5 18,4,16 18,8 25,9,33 196,8 28,2,42 25,7 29,5,5 6K ,5 17,4,11 134,2 19,2,15 144,1 2,6,19 22, 29,,4 219,8 31,5,51 229,6 32,9, ,9 19,3,14 148,9 21,3,18 159,7 22,9,23 223,3 32,,48 242,7 34,8,62 253,5 36,3, ,3 21,3,16 163,6 23,4,22 175,3 25,1,28 244,5 35,1,56 265,7 38,1,73 277,4 39,8, ,8 23,2,19 178,3 25,6,26 19,9 27,4,32 265,8 38,1,66 288,7 41,4,84 31,4 43,2 1, ,9 15,,9 135, 16,6,12 145, 17,8,15 24,3 25,1,31 222,4 27,3,4 232,5 28,6,47 7K ,3 16,6,1 149,6 18,4,14 16,6 19,7,18 225,5 27,7,37 245,4 3,1,47 256,4 31,5, ,7 18,3,12 164,3 2,2,17 176,2 21,6,21 246,8 3,3,43 268,3 33,,56 28,3 34,4,66 Only the single fan unit data have been printed. For multi fan units multiply the by the number of fans. 4

5 Table 2 Capacity tables for the most popular conditions Cooling medium For operating conditions which you can t find in table 2 the unit size must be calculated with correction factors k 1, k 2 and the nominal Q N of table 1. Unit size 33/5 33/6 33/7 45/5 45/6 45/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,9 29,6,8 192,1 33,,11 26, 35,4,15 226,9 39,,15 25, 43,,21 266, 45,8, ,2 34,3,11 222,1 38,2,15 238, 4,9,19 261,8 45,,2 287,9 49,5,27 36,2 52,7, ,5 39,,14 252,2 43,4,19 27, 46,4,24 296,6 51,,25 325,9 56,1,34 346,4 59,6,42 5K ,8 43,7,17 282,3 48,6,23 32, 51,9,29 331,5 57,,31 364, 62,6,41 386,6 66,5, ,2 48,4,2 312,5 53,7,27 334, 57,5,35 366,4 63,,37 42, 69,1,49 426,8 73,4, ,6 53,1,24 342,6 58,9,33 366,1 63,,41 41,3 69,,43 44,1 75,7,58 467,1 8,3, , 57,8,28 372,8 64,1,38 398,2 68,5,48 436,2 75,,5 478,1 82,2,67 57,3 87,3, ,1 23,8,6 186,2 26,7,8 2,2 28,7,1 221, 31,7,11 244, 35,,14 26, 37,3, ,7 28,2,8 22, 31,5,1 236, 33,8,13 26,1 37,3,14 286,7 41,1,19 35,2 43,7,24 6K ,4 32,6,1 253,8 36,4,14 272, 39,,17 299,3 42,9,18 329,4 47,2,25 35,3 5,2, ,1 37,,12 287,6 41,2,17 38, 44,1,22 338,5 48,5,23 372,1 53,3,31 395,5 56,7, ,5 4,9,15 317,7 45,5,2 34, 48,7,26 373,4 53,5,27 41,1 58,8,37 435,8 62,5, ,4 44,3,17 344,1 49,3,24 368, 52,7,3 43,9 57,9,31 443,4 63,6,42 471, 67,5, ,4 28,1,8 255,4 31,4,1 274,1 33,7,13 32,1 37,1,14 332,9 4,9,19 354,4 43,5,24 7K ,1 31,8,9 289,2 35,5,13 31, 38,1,17 341,2 41,9,17 375,6 46,1,24 399,5 49,1, ,4 35,2,11 319,3 39,2,15 342, 42,,2 376, 46,2,21 413,5 5,8,28 439,7 54,, ,4 33,1,1 214,6 36,9,14 23, 39,6,18 253, 43,5,19 278,4 47,9,25 296,1 5,9, ,7 37,8,13 244,7 42,1,18 262, 45,1,23 287,9 49,5,24 316,4 54,4,32 336,3 57,8, ,6 41,9,16 271, 46,6,21 29, 49,9,27 318,4 54,8,28 349,7 6,1,38 371,5 63,9,48 5K ,9 46,6,19 31,2 51,8,26 322, 55,4,33 353,3 6,8,34 387,7 66,7,46 411,7 7,8, ,3 51,3,23 331,3 57,,31 354,1 6,9,39 388,2 66,8,41 425,8 73,2,55 452, 77,7, ,7 56,,26 361,5 62,2,36 386,1 66,4,46 423,1 72,8,48 463,9 79,8,64 492,2 84,7, ,1 6,7,31 391,6 67,4,41 418,2 71,9,53 458,1 78,8,55 51,9 86,3,74 532,5 91,6, ,9 27,2,7 212,5 3,5,1 228,1 32,7,13 251,4 36,,13 277,2 39,7,18 295,1 42,3, ,6 31,6,9 246,3 35,3,13 264, 37,8,16 29,6 41,7,17 319,9 45,8,23 34,3 48,8,29 6K ,9 35,5,12 276,3 39,6,16 296, 42,4,2 325,4 46,6,21 357,9 51,3,29 38,5 54,5, ,2 39,4,14 36,4 43,9,19 328, 47,,24 36,3 51,6,26 395,9 56,7,34 42,7 6,3, ,6 43,4,17 336,5 48,2,23 36, 51,6,29 395,2 56,6,3 433,9 62,2,4 46,9 66,1, ,9 47,3,19 366,7 52,6,26 392, 56,2,34 43,1 61,6,35 471,9 67,6,47 51,1 71,8, ,8 3,6,9 277,9 34,1,12 298, 36,6,15 328,1 4,3,16 361,3 44,4,22 384,5 47,2,28 7K ,1 33,9,11 38, 37,8,15 33, 4,5,19 363, 44,6,2 399,3 49,1,26 424,6 52,2, ,4 37,3,13 338,1 41,5,17 362, 44,5,22 397,8 48,9,23 437,3 53,7,31 464,8 57,1,39 Unit size 52/5 52/6 52/7 77/5 77/6 77/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,7 47,1,31 3,2 51,6,33 315,6 54,3,32 357,6 61,5,45 389,1 66,9,59 41,1 7,5, ,9 54,2,4 345,1 59,4,42 362,6 62,4,41 41,2 7,6,58 446, 76,7,76 469,9 8,8, ,2 61,3,51 39, 67,1,53 49,5 7,4,51 462,9 79,6,72 53, 86,5,95 529,7 91,1 1,18 5K ,4 68,4,62 434,8 74,8,64 456,5 78,5,62 515,6 88,7,87 56, 96,3 1,15 589,5 11,4 1, ,7 75,5,74 479,8 82,5,77 53,5 86,6,74 568,3 97,8 1,4 616,9 16,1 1,37 649,3 111,7 1, , 82,6,87 524,7 9,2,9 55,5 94,7,87 621, 16,8 1,23 673,9 115,9 1,61 79,1 122, 2, ,3 89,7 1,1 569,6 98, 1,5 597,5 12,8 1,1 673,7 115,9 1,42 73,8 125,7 1, ,7 38,4,22 294,2 42,2,23 39,6 44,4,22 351,5 5,4,31 382,9 54,9,41 43,9 57,9, , 45,,29 344,6 49,4,3 362,3 51,9,29 41,7 58,9,41 447, 64,1,55 471,1 67,5,68 6K ,4 51,7,37 395, 56,6,39 415,1 59,5,37 469,9 67,4,53 511, 73,2,7 538,4 77,2, ,8 58,3,46 445,5 63,9,48 467,9 67,1,46 529,2 75,8,66 575,1 82,4,87 65,7 86,8 1, , 64,2,55 49,4 7,3,57 514,9 73,8,55 581,9 83,4,78 632,1 9,6 1,3 665,5 95,4 1, ,1 69,4,63 529,7 75,9,66 556, 79,7,64 628, 9,,9 681,9 97,7 1,18 717,9 12,9 1, ,6 44,8,29 4,2 49,2,3 42,8 51,7,29 476,9 58,6,41 519,1 63,8,54 547,2 67,2,68 7K , 5,5,36 45,6 55,4,37 473,5 58,2,36 536,2 65,9,51 583,1 71,6,67 614,5 75,5, ,2 55,6,42 495,5 6,9,44 52,5 63,9,43 588,8 72,3,6 64,1 78,6,8 674,3 82,8, ,6 52,4,38 333,9 57,4,4 35,8 6,3,38 397,1 68,3,54 431,8 74,3,72 454,9 78,2, ,8 59,5,48 378,7 65,1,5 397,8 68,4,48 449,8 77,4,68 488,7 84,1,9 514,7 88,5 1, ,9 65,7,57 418, 71,9,6 438,9 75,5,58 495,9 85,3,81 538,6 92,6 1,7 567,1 97,5 1,33 5K ,2 72,8,69 462,9 79,6,72 485,9 83,6,69 548,6 94,4,98 595,6 12,4 1,29 626,9 17,8 1, ,5 79,9,82 57,8 87,3,85 532,9 91,7,82 61,3 13,4 1,16 652,5 112,2 1,52 686,7 118,1 1, ,8 87,,96 552,7 95,1,99 579,9 99,7,96 653,9 112,5 1,35 79,5 122, 1,77 746,5 128,4 2, ,1 94,1 1,1 597,6 12,8 1,14 626,9 17,8 1,1 76,6 121,5 1, ,7 43,5,27 333,4 47,8,28 35,6 5,3,27 397,5 57,,39 432,7 62,,52 456,2 65,4, ,1 5,2,35 383,8 55,,37 43,4 57,8,35 456,7 65,5,5 496,8 71,2,66 523,5 75,,83 6K ,3 56,1,43 428,7 61,4,45 45,3 64,5,43 59,4 73,,61 553,7 79,4,81 583,3 83,6 1, ,5 62,,52 473,6 67,9,54 497,3 71,3,52 562,1 8,6,73 61,7 87,5,97 643,1 92,2 1, ,8 67,9,61 518,4 74,3,63 544,3 78,,61 614,8 88,1,86 667,7 95,7 1,14 72,9 1,8 1, ,1 73,8,71 563,4 8,7,74 591,3 84,8,71 667,5 95,7 1, 724,6 13,9 1,32 762,7 19,3 1, ,5 48,6,33 433,8 53,3,35 455,9 56,,33 516,4 63,4,48 561,8 69,,63 592, 72,7,78 7K ,8 53,7,4 478,6 58,8,41 52,9 61,8,4 569,1 69,9,57 618,7 76,,75 651,8 8,1, , 58,7,47 523,5 64,3,49 549,9 67,6,47 621,7 76,4,67 675,7 83,,88 711,6 87,4 1,9 Only the single fan unit data have been printed. For multi fan units multiply the by the number of fans. 5

6 Table 2 Capacity tables for the most popular conditions Cooling medium with 35 weight % ethylene glycol For operating conditions which you can t find in table 2 the unit size must be calculated with correction factors k 1, k 2 and the nominal Q N of table 1. Unit size 8/5 8/6 8/7 12/5 12/6 12/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,9 5,,1 31, 6,,1 37,2 7,2,2 43,9 8,4,3 48,9 9,4, ,8 5,4,1 33,9 6,5,1 39,1 7,5,2 45,7 8,8,3 53, 1,2,4 58,6 11,3, ,9 6,7,1 41,1 7,9,2 46,7 9,,3 53,9 1,4,3 61,9 11,9,5 68,2 13,1,7 5K ,4 8,,2 48,1 9,3,3 54,1 1,4,4 62, 11,9,4 7,8 13,6,7 77,7 15,, ,7 9,2,2 54,9 1,6,4 61,4 11,8,5 7,1 13,5,6 79,7 15,4,8 87,2 16,8, ,9 1,4,3 61,7 11,9,4 68,7 13,2,6 78,1 15,,7 88,6 17,1,1 96,8 18,6, , 11,6,4 68,4 13,2,5 76, 14,6,7 86,1 16,6,8 97,5 18,8,12 16,3 2,5, ,8 5,,1 38,5 6,2,2 43,9 7,1, ,6 4,4,1 34,2 5,5,1 41,6 6,7,2 49,4 7,9,2 55,2 8,9,3 6K ,9 4,8,1 37,5 6,,1 43,5 7,,2 51,3 8,2,2 59,7 9,6,3 66,2 1,6, ,4 6,2,1 45,8 7,4,2 52,2 8,4,3 6,6 9,7,3 69,8 11,2,5 77, 12,4, ,1 7,2,2 52,9 8,5,2 59,7 9,6,3 68,7 11,,4 78,8 12,6,6 86,6 13,9, ,8 8,1,2 58,9 9,5,3 66,2 1,6,4 75,8 12,2,5 86,6 13,9,7 94,9 15,2, ,7 4,4,1 39,5 5,4,1 48,2 6,6,2 57,2 7,9,2 64, 8,8,3 7K ,8 4,5,1 41,9 5,8,1 49, 6,7,2 57,9 8,,2 67,6 9,3,3 75, 1,3, , 5,6,1 49,5 6,8,2 56,8 7,8,2 66,2 9,1,3 76,6 1,5,4 84,6 11,6, ,8 5,,1 32, 6,2,1 37,1 7,1,2 43,6 8,4,2 5,7 9,8,4 56,2 1,8, ,2 6,4,1 39,4 7,6,2 44,8 8,6,3 51,8 1,,3 59,7 11,5,5 65,8 12,7,7 5K , 7,5,2 45,5 8,8,3 51,3 9,9,4 59, 11,4,4 67,5 13,,6 74,1 14,3, ,3 8,7,2 52,4 1,1,3 58,7 11,3,5 67, 12,9,5 76,4 14,7,8 83,7 16,1, ,6 9,9,3 59,2 11,4,4 66, 12,7,6 75,1 14,5,6 85,3 16,4,9 93,2 18,, ,7 11,1,3 65,9 12,7,5 73,3 14,1,7 83,1 16,,8 94,1 18,1,11 12,7 19,8, ,9 12,3,4 72,6 14,,6 8,6 15,5,8 91,1 17,6,9 13, 19,8,13 112,2 21,6, ,9 5,1,1 39,4 6,3,1 47, 7,6,2 52,8 8,5, ,6 4,4,1 35,5 5,7,1 41,6 6,7,2 49,2 7,9,2 57,4 9,2,3 63,8 1,2,4 6K ,8 5,7,1 43,1 6,9,2 49,4 7,9,2 57,5 9,2,3 66,5 1,7,4 73,4 11,8, ,7 6,8,1 5,2 8,1,2 56,9 9,1,3 65,7 1,5,4 75,4 12,1,5 83, 13,3, ,2 7,9,2 57,2 9,2,3 64,3 1,3,4 73,8 11,8,4 84,3 13,5,6 92,5 14,9, ,5 8,9,2 64, 1,3,3 71,7 11,5,5 81,9 13,1,5 93,2 15,,8 12,1 16,4, ,8 5,3,1 45,9 6,3,2 54,7 7,5,2 64,2 8,8,3 71,4 9,8,4 7K ,1 5,2,1 46,7 6,4,1 53,9 7,4,2 63,1 8,7,3 73,2 1,1,4 81, 11,1, ,4 6,2,1 54, 7,4,2 61,5 8,5,3 71,4 9,8,3 82,2 11,3,5 9,6 12,5,6 Unit size 16/5 16/6 16/7 26/5 26/6 26/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,7 15,,9 86,7 16,7,12 93,7 18,,16 134,7 25,9,34 147,2 28,4,44 154,2 29,7, , 17,5,12 11,3 19,5,16 19,2 21,,21 155,9 3,,44 17,1 32,8,57 178, 34,3, ,4 2,1,15 115,9 22,3,21 124,8 24,,27 177, 34,1,56 193, 37,2,72 21,9 38,9,86 5K ,8 22,7,19 13,6 25,2,26 14,4 27,,33 198,3 38,2,69 215,9 41,6,88 225,8 43,5 1, ,2 25,3,23 145,2 28,,31 155,9 3,,4 219,5 42,3,82 238,9 46, 1,6 249,7 48,1 1, ,6 27,9,28 159,8 3,8,37 171,5 33,,47 24,7 46,4,98 261,8 5,4 1,26 273,6 52,7 1, ,1 3,4,32 174,5 33,6,44 187,2 36,1,55 261,9 5,5 1,14 284,8 54,9 1,46 297,5 57,3 1, ,3 11,8,6 82,4 13,2,8 89,4 14,4,1 13,5 2,9,23 143, 23,,3 149,9 24,1, ,5 14,2,8 98,9 15,9,11 16,9 17,2,14 154,2 24,8,31 168,7 27,1,41 176,7 28,4,48 6K ,6 16,6,11 115,4 18,5,15 124,4 2,,19 178, 28,6,4 194,4 31,2,52 23,5 32,7, ,6 19,,14 131,8 21,2,19 141,9 22,8,24 21,9 32,4,51 22,2 35,3,66 23,3 37,, , 21,2,17 146,4 23,5,23 157,5 25,3,29 223,1 35,8,61 243,1 39,,79 254,2 4,8, ,7 23,1,2 159,2 25,6,27 171,2 27,5,34 241,6 38,8,7 263,1 42,2,91 275,1 44,2 1, ,7 14,1,8 114,8 15,8,11 124,1 17,1,14 179,1 24,6,31 195,8 26,9,4 25,2 28,2,48 7K ,8 16,2,1 131,2 18,1,14 141,6 19,5,18 22,9 27,9,39 221,6 3,5,5 232, 31,9, ,2 18,,12 145,9 2,1,17 157,2 21,6,22 224, 3,8,46 244,5 33,6,6 255,8 35,2, ,7 16,9,11 97,7 18,8,15 15,3 2,3,19 15,6 29,,42 164,4 31,7,54 172,1 33,1, ,1 19,5,14 112,3 21,6,2 12,9 23,3,25 171,7 33,1,53 187,3 36,1,68 195,9 37,7,81 5K ,8 21,7,17 125,1 24,1,24 134,5 25,9,3 19,3 36,7,64 27,3 39,9,82 216,8 41,8, ,2 24,3,21 139,7 26,9,29 15,1 28,9,37 211,5 4,7,77 23,3 44,4,99 24,7 46,4 1, ,6 26,9,26 154,3 29,7,35 165,7 31,9,44 232,7 44,8,92 253,2 48,8 1,18 264,6 51, 1, , 29,5,3 169, 32,6,41 181,3 34,9,52 254, 48,9 1,8 276,2 53,2 1,38 288,5 55,6 1, ,5 32,1,36 183,7 35,4,48 196,9 37,9,61 275,2 53, 1,24 299,1 57,6 1,6 312,4 6,2 1, ,1 13,7,8 95,3 15,3,1 13, 16,5,13 149, 23,9,29 163, 26,2,38 17,8 27,4, ,2 16,1,1 111,7 17,9,14 12,6 19,4,18 172,7 27,7,38 188,7 3,3,5 197,6 31,7,59 6K ,6 18,2,13 126,3 2,3,17 136,1 21,9,22 193,9 31,1,47 211,6 34,,61 221,4 35,5, , 2,4,16 14,9 22,6,21 151,7 24,3,27 215,1 34,5,57 234,5 37,6,74 245,3 39,4, ,4 22,5,19 155,6 25,,25 167,3 26,9,32 236,3 37,9,68 257,4 41,3,87 269,1 43,2 1, ,8 24,7,22 17,2 27,3,3 182,8 29,4,38 257,5 41,3,79 28,3 45, 1,2 293, 47, 1, ,7 15,5,9 125,8 17,3,13 135,8 18,7,17 194,9 26,8,36 213, 29,3,47 223, 3,7,56 7K ,1 17,4,12 14,4 19,3,16 151,3 2,8,2 216,1 29,7,43 235,9 32,5,56 246,9 34,, ,5 19,2,14 155, 21,3,19 166,9 23,,24 237,3 32,6,52 258,8 35,6,67 27,7 37,3,8 Only the single fan unit data have been printed. For multi fan units multiply the by the number of fans. 6

7 Table 2 Capacity tables for the most popular conditions Cooling medium with 35 weight % ethylene glycol For operating conditions which you can t find in table 2 the unit size must be calculated with correction factors k 1, k 2 and the nominal Q N of table 1. Unit size 33/5 33/6 33/7 45/5 45/6 45/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,8 3,6,9 179, 34,5,13 192,9 37,2,16 213,7 41,2,18 236,7 45,6,24 252,7 48,7, , 35,8,12 28,9 4,3,17 224,7 43,3,22 248,4 47,9,23 274,5 52,9,31 292,7 56,4, ,3 41,1,16 238,9 46,,22 256,6 49,4,28 283,2 54,6,29 312,4 6,2,4 332,8 64,1,5 5K ,6 46,3,19 269, 51,8,27 288,5 55,6,34 318, 61,3,36 35,3 67,5,49 372,9 71,8, ,8 51,6,24 299, 57,6,32 32,5 61,7,41 352,8 68,,44 388,3 74,8,59 413,1 79,6, ,1 56,9,28 329,1 63,4,39 352,5 67,9,49 387,6 74,7,52 426,3 82,1,7 453,3 87,3, ,4 62,1,33 359,1 69,2,45 384,5 74,1,58 422,5 81,4,61 464,3 89,4,81 493,4 95,1 1, ,2 24,1,6 17,5 27,4,8 184,4 29,6,11 25,3 33,,12 228,2 36,6,16 244,2 39,2, , 29,1,8 24,3 32,8,12 22,3 35,4,15 244,3 39,2,16 27,8 43,5,22 289,2 46,4,28 6K ,7 34,,11 238, 38,2,15 256,1 41,1,2 283,4 45,5,21 313,4 5,3,29 334,3 53,7, ,3 38,9,14 271,7 43,6,2 292, 46,9,25 322,5 51,8,27 356, 57,1,36 379,3 6,9, ,6 43,3,17 31,7 48,4,24 323,9 52,,3 357,2 57,3,32 393,9 63,2,43 419,4 67,3, ,4 47,1,2 328, 52,7,27 351,8 56,5,35 387,6 62,2,37 427,1 68,6,5 454,5 73,, , 28,9,8 237, 32,6,11 255,7 35,2,15 283,6 39,,16 314,3 43,3,22 335,8 46,2,28 7K ,7 33,1,11 27,8 37,3,15 291,5 4,1,19 322,7 44,4,2 356,9 49,1,27 38,8 52,4, , 36,9,13 3,8 41,4,18 323,4 44,5,23 357,4 49,2,24 394,8 54,3,33 42,8 57,9, ,2 34,5,11 21,5 38,8,16 216,8 41,8,2 239,8 46,2,22 265,1 51,1,29 282,7 54,5, ,5 39,8,15 231,4 44,6,2 248,7 47,9,26 274,5 52,9,28 32,9 58,4,37 322,8 62,2, ,3 44,4,18 257,7 49,6,25 276,6 53,3,32 34,9 58,7,34 336,1 64,8,45 357,9 68,9,57 5K ,6 49,6,22 287,7 55,4,3 38,5 59,4,39 339,7 65,4,41 374,1 72,1,55 398, 76,7, ,9 54,9,26 317,8 61,2,36 34,5 65,6,46 374,5 72,2,49 412, 79,4,65 438,2 84,4, ,2 6,1,31 347,8 67,,43 372,5 71,8,54 49,4 78,9,57 45, 86,7,77 478,4 92,2, ,5 65,4,36 377,9 72,8,5 44,5 77,9,63 444,2 85,6,67 488, 94,,89 518,6 99,9 1, ,2 28,,8 196,8 31,6,11 212,3 34,1,14 235,7 37,8,15 261,3 42,,21 279,2 44,8, ,9 32,9,1 23,5 37,,14 248,2 39,8,19 274,7 44,1,2 33,9 48,8,27 324,2 52,1,34 6K ,1 37,3,13 26,5 41,8,18 28,1 45,,23 39,4 49,7,25 341,8 54,9,33 364,3 58,5, ,4 41,6,16 29,5 46,6,22 311,9 5,1,28 344,2 55,3,3 379,6 6,9,4 44,4 64,9, ,6 46,,19 32,5 51,5,26 343,9 55,2,34 378,9 6,8,36 417,6 67,,48 444,5 71,4, ,9 5,4,23 35,5 56,3,31 375,8 6,3,4 413,7 66,4,42 455,5 73,1,56 484,6 77,8, ,5 31,7,1 259,5 35,7,14 279,6 38,5,18 39,6 42,6,19 342,7 47,2,25 365,8 5,3,32 7K ,7 35,5,12 289,5 39,8,17 311,5 42,9,21 344,4 47,4,23 38,6 52,4,31 45,8 55,8, , 39,2,14 319,5 44,,2 343,3 47,2,25 379,1 52,2,27 418,4 57,6,36 445,9 61,4,46 Unit size 52/5 52/6 52/7 77/5 77/6 77/7 Water temperature temp. Wet-bulb of [ C] Watertemp. [ C] ,3 5,2,36 286,8 55,3,38 32,1 58,2,37 344, 66,3,53 375,4 72,3,71 396,3 76,4, ,4 58,1,48 331,5 63,9,5 348,9 67,2,48 396,5 76,4,69 432,2 83,3,92 456, 87,8 1, ,6 66,,6 376,3 72,5,63 395,8 76,2,61 449,1 86,5,87 489,1 94,2 1,15 515,8 99,4 1,43 5K ,7 73,9,74 421,1 81,1,77 442,7 85,3,75 51,7 96,7 1,6 546, 15,2 1,4 575,5 11,9 1, ,9 81,9,89 465,9 89,8,93 489,6 94,3,9 554,4 16,8 1,27 62,9 116,2 1,68 635,3 122,4 2, ,2 89,8 1,5 51,7 98,4 1,1 536,6 13,4 1,6 67, 116,9 1,5 659,9 127,1 1, ,4 97,7 1,23 555,6 17, 1,28 583,5 112,4 1,23 659,7 127,1 1, ,9 4,4,25 278,3 44,7,26 293,6 47,1,25 335,4 53,8,37 366,8 58,9,49 387,7 62,2, ,1 47,8,33 328,5 52,7,35 346,2 55,6,34 394,4 63,3,49 43,6 69,1,65 454,7 73,,82 6K ,3 55,3,43 378,8 6,8,46 398,8 64,,44 453,5 72,8,63 494,5 79,4,84 521,9 83,8 1, ,5 62,7,55 429,1 68,9,57 451,5 72,5,55 512,6 82,3,79 558,5 89,7 1,5 589, 94,6 1, ,7 69,3,66 473,9 76,1,69 498,4 8,,66 565,2 9,7,95 615,4 98,8 1,25 648,8 14,2 1, ,7 75,1,76 513,1 82,4,79 539,4 86,6,77 611,3 98,1 1,9 665,2 16,8 1,44 71,1 112,6 1, , 47,6,33 381,4 52,5,35 42, 55,3,34 458, 63,,49 5, 68,8,65 528, 72,7,81 7K ,2 54,,42 431,7 59,4,44 454,6 62,6,42 517, 71,1,61 563,9 77,6,81 595,1 81,9 1, ,3 59,6,5 476,4 65,6,52 51,4 69,,51 569,6 78,4,72 62,7 85,4,96 654,9 9,1 1, ,2 56,1,45 32,3 61,7,47 337,2 65,,45 383,4 73,9,65 418, 8,5,86 441,1 85, 1, ,3 64,,57 365,1 7,3,59 384,1 74,,58 435,9 84,,82 474,9 91,5 1,9 5,8 96,5 1,36 5K ,3 7,9,69 44,3 77,9,72 425,1 81,9,69 482, 92,8,99 524,7 11,1 1,3 553,1 16,6 1, ,5 78,9,83 449,1 86,5,87 472, 9,9,84 534,6 13, 1,19 581,6 112, 1,57 612,9 118,1 1, ,7 86,8,99 493,9 95,2 1,3 519, 1, 1, 587,3 113,1 1,41 638,5 123, 1,87 672,7 129,6 2, ,9 94,8 1,16 538,8 13,8 1,21 565,9 19, 1,17 64, 123,3 1, ,2 12,7 1,34 583,7 112,4 1,4 612,9 118,1 1, ,8 46,2,31 317,4 51,,33 334,5 53,7,32 381,3 61,2,46 416,4 66,8,61 439,8 7,6, , 53,6,41 367,6 59,,43 387,1 62,1,42 44,3 7,7,6 48,3 77,1,8 56,9 81,4 1, 6K ,1 6,2,51 412,4 66,2,53 434, 69,7,52 492,9 79,1,74 537,1 86,2,98 566,6 91, 1, ,2 66,8,61 457,1 73,4,64 48,8 77,2,62 545,5 87,6,89 594, 95,4 1,17 626,4 1,6 1, ,4 73,4,73 51,9 8,6,76 527,7 84,7,74 598,1 96, 1,5 65,9 14,5 1,39 686,2 11,2 1, ,6 8,,85 546,7 87,8,89 574,6 92,2,86 65,8 14,5 1,22 77,9 113,6 1,61 745,9 119,8 2, ,8 51,8,39 414,9 57,1,41 437, 6,1,39 497,3 68,4,57 542,6 74,7,75 572,8 78,8,94 7K ,9 57,5,47 459,7 63,2,49 483,8 66,6,48 549,9 75,7,68 599,4 82,5,9 632,5 87, 1, , 63,2,55 54,4 69,4,58 53,7 73,,56 62,4 82,9,8 656,3 9,3 1,6 692,2 95,2 1,33 Only the single fan unit data have been printed. For multi fan units multiply the by the number of fans. 7

8 Selection Curves z = 1K Correction factor k Wet-bulb temperature t f in C z = 3K Correction factor k Wet-bulb temperature t f in C

9 Selection Curves z = 5K Correction factor k Wet-bulb temperature t f in C z = 6K Correction factor k Wet-bulb temperature t f in C

10 Selection Curves z = 7K Correction factor k Wet-bulb temperature t f in C z = 8K Correction factor k Wet-bulb temperature t f in C

11 Selection Curves z = 1K Correction factor k Wet-bulb temperature t f in C z = 15K Correction factor k Wet-bulb temperature t f in C

12 Selection Curves z = 2K Correction factor k Wet-bulb temperature t f in C z = 3K Correction factor k Wet-bulb temperature t f in C

13 The temperature of the, as well as the wet-bulb temperature, are the deciding factors for determining the correction factor k 1. The higher the temperature and the lower the wet-bulb temperature, the larger is k 1. The velocity of the in the coil system is to be considered with the correction factor k 2 which, in turn, can be determined from the selection curve 2. Selection curve 2 1,2 1,1 1, Correction factor k 2 Selection procedure,9,8,7,6,2,6 1 1,4 1,8 2,2 2,6 3 3,4 3,8 4,2 4,6 5 operating ratio: nominal Steps of calculation 1 Determination of operating Q B 2 Correction factor k 1 from selection curve 1. Interpolation if necessary. 3 Determine nominal Q N. Correction factor k 2 is set at 1,. Q B Q N = k 1 k 2 = Q B k 1 4 Choose a unit with an equal or higher nominal. 5 Divide the operating by the nominal of the unit. 6 Find the correct correction factor k 2 on the selection curve 2. Please note the end number of the unit. 7 Calculate the required nominal Q N req. with both correction factors k 1 and k 2. 8 The celection is correct, if this calculated nominal is equal or lower than that of the chosen unit. If it is higher the calculation should be repeated with the next size unit. 9 The operating must lie within the permissible s indicated in table 1. 1 Determine pressure for coil from selection curve 3. Selection examples Example 1 Given: G W = 55 kg/h Water inlet temperature t WI = + 35 C Water outlet temperature t WO = + 27 C Wet-bulb temperature t WB = + 21 C You can t find the operating conditions in table 2. Result: 1 Q B = 55 (35-27) = 44 kcal/h = 512 kw 2 k 1 =,71 (Selection curve 8 K range) 3 Q N = 512 kw,71 = 721 kw 4 Unit selected: 2/45/5 with Q N = 736 kw 5 operating 55 kg/h = =,982 nominal 56 kg/h 6 k 2 =,99 from selection curve 2 7 Q 512 kw N req. = = 728 kw,71,99 8 The choise stays with unit 2/45/6 with Q N is = 736 kw 9 The permissible lies between 16 8 and 26 kg/h. 55 kg/h are between these fi gures. 1 The pressure for the coil is,8 bar. Example 2 Given: G W = 3 kg/h Water inlet temperature t WI = + 5 C Water outlet temperature t WO = + 3 C Wet-bulb temperature t WB = + 21 C You can t find the operating conditions in table 2. Result: 1 Q B = 3 (5-3) = 6 kcal/h = 697,7 kw 2 k 1 = 1,1 (Selection curve 2 K range) 3 Q N = 697,7 kw 1,1 = 69,8 kw 4 Unit selected: 2/45/5 mit Q N = 736 kw 5 operating 3 kg/h = =,536 nominal 56 kg/h 6 k 2 =,88 from selection curve 2 7 Q 697,7 kw N req. = = 785 kw 1,1,88 8 The selected unit is to small. Select new unit once start with item 4. 4* New unit 2/45/6 with Q N = 82 kw 5* operating 3 kg/h = =,536 nominal 56 kg/h 6* k 2 =,88 from selection curve 2 7* Q 697,7 kw N req. = = 785 kw 1,1,88 8* The chois stays with unit 2/45/6 with Q N = 82 kw 9 The permissible lies between 16 8 and 26 kg/h. 3 kg/h are between these fi gures. 1 The pressure for the coil is,3 bar. 13

14 Operation of an Evaporative Cooler with ethylene glycol (table 3a) with propylene glycol (table 3b) If an Evaporative Cooler must be shut off at temperatures lower than C, and if the coil system cannot be emptied, it is advisable to use a mixture of and ethylene glycol for the circuit in order to prevent freezing in the coil. A good mixture for middle european conditions consists of 4 weight % or 32,2 Vol. % ethylene glycol with. If exact proportions are observed, however, a mixture of 3 weight % or 28 Vol. % may be suffi cient. Table 3a Ethylene glycol* For example Antifrogen N (registered trade) Ethylene Mixture begins Density at Spec. heat Multiplier for the pressure Multiplier for Multiplier to calculate glycol to freeze at +3 C in kg/m 3 at +3 C in the coil compared the nominal the ethylene glycol proportion to the in kg/h in kj/kg K 4 weight % - 26,7 C 15 3,52 1,32 1,76 1, weight % - 21,8 C 145 3,58 1,275 1,45 1,12 3 weight % - 17 C 14 3,64 1,23 1,3 1,15 25 weight % - 13 C 134 3,73 1,19 1,2 1,8 The unit is selected in the same manner as using. There is no difference up to step 4. In step 5, as indicated in table 3 and shown in the example, consideration must be given to the multiplier for the nominal. Selection curve 2 must not, however, under any circumstances be extended to the left (laminar fl ow) if the ratio falls under,3. A larger at a lower range is to be strived for in this case. Ethylene glycol is successfully proved as brine for closed circuit by thousands of evaporative cooler inspite of its toxin characteristic feature. Is there any doubt to use ethylene glycol you can use propylene glycol. But its heat transmission is unfavourable than by ethylene glycol. Table 3b Propylene glycol* For example Antifrogen L (registered trade mark) Propylene Mixture begins Density at Spec. heat Multiplier for the pressure Multiplier for Multiplier to calculate glycol to freeze at +3 C in kg/m 3 at +3 C in the coil compared the nominal the propylene glycol proportion to the in kg/h in kj/kg K 45 weight % - 25 C 133 3,7 1,42 2,56 1,9 4 weight % - 21 C 13 3,8 1,36 2,25 1,65 35 weight % - 17 C 127 3,88 1,31 1,92 1,4 3 weight % - 14 C 123 3,94 1,27 1,57 1,25 * Remark Pure mixtures without inhibitors should not be used because of its corrosive charateristic features. The chemical industry offers only brines of glycol base. For example Antifrogen N with registered trade mark for ethylene glycol and antifrogen L with registered trade mark for propylene glycol. Selection example Given: G W = 19 kg/h Water inlet temperature t WI = + 36 C Water outlet temperatutre t WO = + 3 C Wet-bulb temperature t WB = + 2 C Result: 1 Q B = 19 (36-3) = 114 kcal/h= 132,6 kw 2 k 1 =,91 (Selection chart for 6 K range) 3 Q N req. = 132,6 kw,91 = 145,7 kw 4 Unit selected 16/6 with Q N = 145,7 kw 5 operating nominal multiplier with the nominal 19 kg/h = =,93 14 kg/h 1,45 In this example the unit should work with a 35 weight % ethylene glycol mixture, to prevent freezing in the coil. You can t find the operating conditions in table 2. 6 k 2 =,98 from selection curve ,6 kw Q N req. = = 149 kw,91,98 8 The choise stars with unit 16/6 with Q N = 155 kw 9 The permissible lies between 42 and 65 kg/h. 19 kg/h are between these fi gures. 1 The pressure in the coil system for is,16 bar, for the mixture with the multiplier 1,275 from table 3,,16 x 1,275 =,2 bar. When selecting the pump the operating ethylene glycol should be known. The multiplier is also given in table 3. Example: 19 kg/h 1,12 = 21 l/h 35 weight % ethylene glycol/ mixture. For enquiries please note: The following data use essential for the selection of an evaporative cooler: 1 Water inlet temperature e.g C. 2 Requested outlet temperature e.g C. 3 Water e.g. 5 m 3 /h 4 Ambient wet-bulb temperature e.g. + 2 C Plan of the available space for the installation. 6 Additional static pressure of the fan. 7 Air cooled operation of the evaporative cooler (without spraying) wanted?

15 in the coil system The pressure in the coil must be known to select the pumpe for the circuit. Consult curve 3 for this purpose. Example 1 () There are 21 kg/h to be cooled in a unit 3/77/5. The unit has three fans (indicated by the fi rst number). Read:,57 bar. Example 2 (35 weight % Ethylene glycol) There are 2 kg/h to be cooled in a unit 16/5. The unit has one fan. Read for :,14 bar. Multiplier from table 3 for the pressure of ethylene glycol vs : 1,275. For 35 weight % ethylene glycol:,14 x 1,275 =,18 bar. Circulating ethylene glycol (at same range): 2 x 1,12 = 22 4 l/h. Multiplier 1,12 from table 3a/ mixture. Selection curve 3 2,5 2, 77/7 52/7 77/6 45/7 52/6 77/5 33/7 45/6 52/5 33/6 45/5 33/5 26/7 26/6 26/5 16/7 16/6 12/7 16/5 8/7 12/6 8/6 12/5 8/5,6,4,3,2 1,5 1,2 1,,8,1,6,4,3,2,1,6 in the coil system flow rate per cell (per fan ) 15

16 Operation of the unit during the winter Suggestion 1 Primary circuit: Ethylene Glycol 35 weight %. Secondary circuit: Electrically heated. The primary circuit is fi lled with a mixture of 35 % ethylene glycol- mixture which has its freezing point at 21,8 C. When the unit is not in operation, and the temperature falls below + 6 C, it is necessary to heat the for the secondary circuit in the pan electrically. The fresh make-up supply is outfi tted with a thermostatically controlled supplementary heating cable. No air cooled operation and no spray without fan operation. Unit located outside coil-system drift eliminators spray system secondary circuit () primary circuit (ethylene glycol 35 weight % make-up with electr. pipeheating and thermostat foundation heated room For better clearness, drain, overfl ow and valves are not drawn. electr. panheating; thermostat adjustment: + 6/9 C pump (secondary ciruit) closed expansion vessel e. g. tubular heat exchanger (condenser) pump (primary circuit) Suggestion 2 Primary circuit: The air inlet- and outlet-openings are being closed by air dampers. An electric pan heating system keeps the interior of the unit housing free of frost. Secondary circuit: Heated electrically. The self-acting inlet air damper, located in the fan diffuser, will close when the fan shut down. The air discharge damper, located in the cross section of outlet, will close when the in the primary circuit gets too cold, in spite of shut down of the fans and pump of the secondary circuit. The controls may be set in such a way that the air discharge damper will always close when the fans and the pump of the secondary circuit are not operating. The fan starts up only when the air discharge damper is open. The auxillary contacts on the servomotors make this kind of operation possible. The reinforced electric pan heating is suffi cient to keep the interior of the unit, as well as the coil system, free of frost. A safety thermostat switch-on a safety alarm device or the pump of the primary circuit if the temperature falls below + 4,5 C. In that case additional heat from a condenser or a add-on heating is necessary. The probe of the thermostat is installed into the top heater of the coil system. The outside pipes are outfi tted with supplementarey electrical heating cables. No air cooled operation. Unit located outside coil-system self-acting inlet air damper foundation motor driven outlet air damper open/close secondary circuit safety-thermostat switch-on at + 4,5 C primary circuit () pump (secondary circuit) pipes with isolation and electr. pipeheating; thermostat adjustment: + 4,5 C heated room make-up- reinforced electr. panheating thermostat adjustment: + 9/12 C closed expansion vessel e. g. tubular heat exchanger (condenser) Example List of Accessories for Unit 77/6 1 Evaporative cooler for closed circuit 77/6 1 E-motor 15 min kw 1 Pump for secondary circuit 2,2 kw 3 Immersion heater for pan heating 1 % reinforced each 2 kw 1 Thermostat for pan heating (set to + 9 C) fi xed switching differential 3 K 1 Self-acting open-close inlet air damper 1 Electrically operated open-close discharge air damper 3,5 VA/23 V servo motor with auxillary contacts 1 Ball valve R 3 / 4 2 Flanges for inlet and outlet DN 1 2 Weding neck fl anges for inlet and outlet DN 1 1 Weding neck fl ange for overfl ow DN 65 6 Spray room inspection doors on both sides of the unit 1 Safety thermostat for safety alarm contact against non-freezing set thermostat to + 4,5 C (fi xed switching differential 1,5 K) 16 pump (primary circuit)

17 Air cooled operation (without spraying) We recommend by this mode of operation that the fan motor should be selected 15 % to 2 % larger, than the indicated absorbed power of the fan (because the unit operates without the pressure of the spraying). By air cooled operation at ambient temperatures below C please note remarks in the assessories list (heating of pan, spiral heating coil). Capacity control may be achieved by different means: The fan is shut off. The s to approx. 15 %. Please compare comments on page 19. The pump is shut off. The unit operates as air-cooled cooler without consumption. We recommend this mode of operation in cases where the pump is not frequentely swiched on and off and where the of the secondary circuit does not cause deposits. The coil-system becomes dry during shut-offs, encouraging mineral deposits of the to cling to its surface, thus contributing to the scaling of the coil-system. Selection curve 4 7x1-3 units with end number /7 /6 / It is not taken into account whether the unit operates with or any mixture of and glycol factor C Rule: Q = C V V Difference = average temperature ambient air temperature [K] Example The unit 33/6 is operated at an ambient air temperature of + 5 C without spraying. The inlet temperature is 33 C, the outlet temperature is 27 C. How large is the? Average temperature: 3 C Difference of temperature: 3-5 = 25 K Factor C according to selection curve 4 for units with end number 6 4, 1-3 =,4 V (air volume of the unit in m 3 /h): 26 Q = C V =,4 26 = 82,4 kw 17

18 Technical Specification Technical Data Evaporative cooler for closed circuit, type Cooling kw Water inlet temperature C Water oultlet temperature C Ambient wet-bulb temperature C Primary circuit m 3 /h Primary pressure (coil-system) bar Surface area of coil-system m 2 Fresh consumption by evaporation m 3 /h Recommended allowance for bleed : 2 1 % of the fresh m 3 /h consumption by evaporation, depending upon the nature of the Additional static pressure for the fan Pa Air volume m 3 /h Fan speed min -1 Fan power, absorbed kw Three-phase fan motor, one speed, 23/4 V or 4/69 V, 5 Hz or Three-phase two speed motor 4 V, 5 Hz, Dahlander circuit kw Motor speed min -1 Shipping weight kg Operated weight at a level of 18 mm in the unit kg Dimension lenght/width/height mm Noise at 3 m horizontally in extension of the fan shaft, with free acousitic propagation db(a) The supply should comply with the following conditions: Unit completely assembled or broken down into individual components. The supply should consist of: 1 Casing and pan section The casing and pan section form one unit and consist of heavy-gaupge galvanised, folded sheet metal panels, which are assembled into a box structure, using stainless steel bolts and a permanently fl exible sealing compound. Galvanised steel beams carry the coil. Defl ector plates distribute the air uniformly over the coil. An inspection door provides access for adjustment of eventual available armatures and for cleaning of the pan section. 2 Water Connections for the secondary circuit All plastic coated connections fi tted to the unit, are provided with fl anges, PN 16 DIN The galvanised make up and plastic coated drain connections have internal threads. Strainer The plastic coated strainer which has a mesh size of about 5 mm is attached to the pump. Casing in such a way that it can be removed through the inspection door. Combined overflow-/bleed-device A special galvanised tray provided with an adjustable cover and situatied in the spray area, discharges the required quantity of bleed directly through the overfl ow. By using of a separate bleed device the tower will be provided with an overfl ow instead of a combined overfl ow and a bleed device. 3 Double width double inlet centrifugal fans Low noise level high effi ciency, heavy duty fans, with forward-curved blades are used. The galvanised fan impeller is statically and dynamically balanced. The fan shaft is made of stainless steel X 2 Cr 13, material-no The feather is made of steel C 45 K according to DIN The heavy duty ball bearings which are assembled in pillow blocks and equipped with lip or labyrinth seals, are provided with grease nipples led to the end of the fan housing for maintenance ease. The fan housing is made of galvanised steel and equipped with an outlet diffuser. The drive is via V-belts. The V-belt pulleys are of cast aluminium with steel hubs. The fan is located in the dry entering air and is readily accessible for maintenance purposes. 4 Belt guard and air intake The guards are hot dipped galvanised after fabrication. By using of a fan enclosure the guards will not be needed. 5 Coil-system The coil is made of steel tube of approx. 2,3 mm wall-thickness and is fully hot-dip galvanised after manufacture. It is drainable and has special headers in order to ensure unimpeded discharge of the. The minimum pitch between the tubes is about 28 mm. The connections are without fl anges. The coil is carefully cleaned after manufacture and subjected to an air pressure test according to DIN Spray system The is sprayed through self-cleaning, non clogging, hollow cone, spray nozzles made of anti-fouling fi breglass reinforced nylon. At a supply pressure the spray nozzles, produce a fi ne spray and, because of their arrangement, ensure uniform distribution. The spray branches and the main header are made of galvanised steel tube DIN Moisture eliminators The moisture eliminators are made of synthetic material for optimum elimination at a low pressure. In the upper part of the eliminators the air directed vertically upwards. Corrosion protection All galv. sheet metal parts are lightly sandblasted, heated in a furnace, and dipped into a plastic powder bed (Performance Polymer Alloy). The plastic coat is approx.,3 mm thick on each side. It has a homogeneous surface, it is elastic, resistant to chemical attack, light- and weatherresistant. (Not coated are: eliminators, fan wheel incl. shaft and pulleys, spray system, bolts and nuts, and all parts which are not hot dipped galvanised.) Accessories: The accessories are described at a separate brochure. 18