Zehnder ZBN Ceiling Heating and Cooling System Technical ...

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44 Minimum mass flow rate Limiting temperatures Ball/ Projective safety To maintain the performance given in the table, a turbulent flow must be ensured in the tubes within the panel. This minimum water flow depends on the lowest system temperature. In the case of heating, it corresponds to the return temperature. In the case of cooling and combined cooling/ heating, it corresponds to the cold water flow temperature. If the minimum water flow per tube is not reached, a reduction in performance of approximately 15 % can occur. In order to achieve optimal comfort levels of the radiant system, the correct design temperature must be selected. This can be checked on the basis of the following table and the diagram. The design temperature must then be less than the two limiting temperatures. In areas where people are present for only a short time, higher limiting temperatures are possible. These are reference values. A detailed calculation is possible according to ISO 7730. When used in sports halls, the stability of the radiant ceiling panels is particularly important, for example, when they are likely to be accidentally hit by balls. Therefore, Zehnder ZBN radiant ceiling panels are checked in accordance with DIN 18032, Part 3 with regard to ball throw safety. The testing was carried out by the Materials Testing Institute, Stuttgart. mounting height m Proportion of the ceiling surface covered by the radiant ceiling panels Zehnder ZBN at 10% at 15% at 20% at 25% at 30% Average heating medium temperature in °C at 35% 3 73 71 68 64 58 56 4 115 105 91 78 67 60 5 >147 123 100 83 71 64 6 132 104 87 75 69 7 137 108 91 80 74 8 >141 112 96 86 80 9 117 101 92 87 10 122 107 98 94 Step 1: Ceiling paneling. The design temperature must not exceed the defined limiting values.
Minimum water flow in the tube, in kg/h mittlere Heizmitteltemp. in °C Average heating medium temperature in °C 300 290 280 270 260 250 240 230 220 210 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 140 130 120 110 100 90 80 70 60 50 10 20 30 40 50 60 70 80 90 100 110 120 130 140 Lowest system temperature 450/3 600/4 750/5 900/6 1050/70 1050/7 40 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 Mounting height in m Abhängehöhe in m Step 2: Radiant panel width. The design temperature must not exceed the defined limiting values. 1200/8 1200/8 Multiplex sports hall, Munich (D) Technical Data 45
Page 1: Zehnder ZBN Ceiling Heating and Coo
Page 4 and 5: 4 Film studios Babelsberg (D)
Page 6 and 7: 6 Experienced in radiant ceiling sy
Page 8 and 9: 8 Indoorsports stadium Berlin (D)
Page 10 and 11: 10 How much energy can be saved? On
Page 12 and 13: 12 Example calculation energy savin
Page 14 and 15: 14 Coffee Chicco d’Oro, Balerna (
Page 16 and 17: 16 How comfortable can a building b
Page 18 and 19: 18 What is the structure of Zehnder
Page 20 and 21: 20 Suspension and fixing The Zehnde
Page 22 and 23: 22 Assembly sets Standard assembly
Page 24 and 25: 24 Joining methods Where a single r
Page 26 and 27: 26 Special solutions Zehnder ZBN ra
Page 28 and 29: 28 Ball guards The galvanized ball
Page 30 and 31: 30 Munich-Riem airport, entrance ha
Page 32 and 33: 32 Zehnder ZBN product advantages Z
Page 34 and 35: 34 Parish church of St. Augustinus,
Page 36 and 37: 36 Temperature difference (heating)
Page 38 and 39: 38 Temperature difference (cooling)
Page 40 and 41: 40 Heating performance with insulat
Page 42 and 43: 42 Museum „Dauphin Speed Event“
Page 46 and 47: 46 Dimensions A B Panel dimensions
Page 48 and 49: 48 Flow configuration Asymmetric an
Page 50 and 51: 50 Optimal heat distribution Optima
Page 52 and 53: 52 Design example Basic design The
Page 54 and 55: 54 Pressure loss calculation The to
Page 56 and 57: 56 Control engineering Flow balanci
Page 58 and 59: 58 Temperature control Globe sensor
Page 60 and 61: 60 Zehnder ZBN specification text Z
Page 62 and 63: Heating - Cooling - Fresh Air Energ

Zehnder ZBN Ceiling Heating and Cooling System Technical ...

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