Zehnder ZBN Ceiling Heating and Cooling System Technical ...

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54 Pressure loss calculation The total pressure loss is made up of the pair of headers and the tubes. Pressure loss in Pa Determining the pressure loss: Example: ZBN 600/4; 20 m; Connection 1’’ 1. Determine the total mass flow of the radiant ceiling panel concerned. . e.g. m = 600 kg/h 2. Read the pressure loss of the pair of headers from the diagram. e. g. np hpair of headers = 210 Pa/pair of headers at 600 kg/h and 1” pipe connection Pressure loss, pair of headers 7000 5000 4000 3000 2000 1500 1000 700 500 400 300 200 150 100 70 50 40 DN 15 (½“) DN 20 (¾“) 3. Obtain the pressure loss of the tube from the diagram. The mass flow is a result of dividing the total mass flow by the number of tubes flowing in parallel. e.g. 600 kg/h : 3 tubes series = 200 kg/h np tube = 300 Pa * 2 (each way) = 600 Pa 4. The total pressure loss of the radiant ceiling panel is now only to be seen as the sum of the individual pressure losses calculated beforehand, e.g. 210 Pa + 600 Pa = 810 Pa 30 150 200 300 500 700 1000 2000 3000 5000 DN 25 (1“) 5 DN 32 (¼“) Total water flow in kg/h
Pressure loss in Pa Pressure loss, tube 20000 19000 18000 17000 16000 15000 14000 13000 12000 11000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 Mass flow per tube in kg/h 1000 950 0 10 20 30 40 50 60 70 80 90 100 110 120 Panel length in m 900 850 800 750 700 650 600 550 500 450 400 350 300 250 200 150 100 Technical Data 55
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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 44 and 45: 44 Minimum mass flow rate Limiting
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 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
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Zehnder ZBN Ceiling Heating and Cooling System Technical ...

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