Pumpen, Betriebs- und Regenwasserwerke/en - Versionsgeschichte

Hilde am 4. Februar 2021 um 07:36 Uhr

2021-02-04T07:36:22Z

2019-01-09T07:15:39Z

2019-01-09T07:14:54Z

Übernehme Bearbeitung einer neuen Version der Quellseite

2018-11-09T14:58:05Z

2018-11-09T14:57:55Z

2018-11-09T14:57:28Z

2018-11-09T14:56:53Z

2018-11-09T14:56:39Z

2018-11-09T14:56:08Z

2018-11-09T14:55:53Z

@@ Zeile 76: / Zeile 76: @@
 The operating water supply for the single-family residential area in a special case. Here the recommendations from DIN 1988, part 3 <ref name="DIN1988">DIN 1988 Teil 3 u. 5</ref> (German regulation) are difficult to grasp. In practice, calculated values for the simultaneity factor that correspond to between 0.1 and 0.2 have proven successful. The common fixtures like toilets, washing machines, garden taps and high-pressure cleaners will also be supplied together assuming a slightly longer filling time.
-:<math>H_{ges} = h_D + 16\ m = 6\ m = 22\ m =2.2\ bar</math>
+:<math>H_{ges} = h_D + 16\ m = 6\ m + 16\ m = 22\ m =2.2\ bar</math>
 In order to supply the fixture with a water pressure of at least 1.6 bar, a 16 m water column is specified in the formula.

@@ Zeile 262: / Zeile 262: @@
 An exception is non-potable water supply in single family houses. Here, the recommendations from DIN 1988, Part 3<ref name="DIN1988">DIN 1988 Teil 3 u. 5</ref> are difficult to estimate. However, in practice, values that mathematically correspond to a simultaneity factor of between 0.1 and 0.2 are found.
 ===Calculating the total discharge head===
 [[Datei:Verluste-Amaturen.png|mini|300px|Pressure loss  (Hv)- diagram for fittings <br> a) check valve DN20 (3/4") <br> b) check valve DN25 (1") <br> c) check valve DN32 (5/4")]]
 [[Datei:Schlauch-und_rohr-verluste.png|mini|300px|Pressure loss (Hv) - diagram for hoses and pipes <br>
-a) PE-HD DN20 (3/4") <br> b) 1" hose <br> c) PE-HD DN25 (1") <br> d) PE-HD DN32 (5/")]]
+a) PE-HD DN20 (3/4") <br> b) 1" hose <br> c) PE-HD DN25 (1") <br> d) PE-HD DN32 (1 1/4")]]
 The total discharge head is the height up to which water may still be supplied by the pump at the required maximum flow rate Q<sub>SP</sub>. It can be separately calculated for each fixture. The largest value (usually the total discharge head of the geodetically highest fixture) is critical.

@@ Zeile 168: / Zeile 168: @@
 The approximate required pumping head is:
 :<math>H_{ges} = h_D + I_D \times 0,2 = \_\ \_\ \_\ m</math>'
 The pipe installed should correspond to the pump connection and should be of PE pipe or EPDM rubber hose with steel coil for direct burial. A check valve (non-return valve) should be installed in the pressure line.
@@ Zeile 260: / Zeile 262: @@
 An exception is non-potable water supply in single family houses. Here, the recommendations from DIN 1988, Part 3<ref name="DIN1988">DIN 1988 Teil 3 u. 5</ref> are difficult to estimate. However, in practice, values that mathematically correspond to a simultaneity factor of between 0.1 and 0.2 are found.
 ===Calculating the total discharge head===
 [[Datei:Verluste-Amaturen.png|mini|300px|Pressure loss  (Hv)- diagram for fittings <br> a) check valve DN20 (3/4") <br> b) check valve DN25 (1") <br> c) check valve DN32 (5/4")]]
 [[Datei:Schlauch-und_rohr-verluste.png|mini|300px|Pressure loss (Hv) - diagram for hoses and pipes <br>
 a) PE-HD DN20 (3/4") <br> b) 1" hose <br> c) PE-HD DN25 (1") <br> d) PE-HD DN32 (5/")]]
 The total discharge head is the height up to which water may still be supplied by the pump at the required maximum flow rate Q<sub>SP</sub>. It can be separately calculated for each fixture. The largest value (usually the total discharge head of the geodetically highest fixture) is critical.

@@ Zeile 288: / Zeile 288: @@
 The total discharge head, which must be provided by the pump is calculated by:
-<div class="mw-translate-fuzzy">
+:<math>H = H_{geo} + H_{fl} + H_v</math>
 For submersible and immersion pumps losses on the suction side are not applicable. As described above, the calculation of losses on the pressure side is done with the flow rates determined for these pumps.

@@ Zeile 276: / Zeile 276: @@
 The geodetic height (H<sub>geo</sub>) is equal to the difference of height between the point of extraction and the lowest water level in the tank. The flow level (H<sub>fl</sub>)  corresponds to the pressure, which must be available in the fixture to ensure smooth functioning. The loss head (H<sub>v</sub>) consists of the suction pipe portion (H<sub>vs</sub>) [the pipe between pump and controller, in case of submersible pumps] together with the rest of the piping system in the house (H<sub>vr</sub>):
-<div class="mw-translate-fuzzy">
+:<math>H_v = H_{vs} + H_{vr}</math>
 The friction loss in the suction pipe (H<sub>vs</sub>) can be read from the diagram. Here, however, only the maximum discharge Q<sub>SP</sub> is to be used in place of the total discharge &sum;Q<sub>R</sub>. The head loss in domestic piping (H<sub>vr</sub>) is determined by the length of the pipe between the control unit and the fixture. With the usual combinations of flow rate and pipe diameter (e.g.: Q = 50 L / min, DN 25; Q = 27 L / min, DN 20; Q = 14 L / min, DN 15), there is an approximate loss of:

@@ Zeile 193: / Zeile 193: @@
 The total discharge therefore equals:
-<div class="mw-translate-fuzzy">
+: <math> \sum Q_R = Q_{R1} + Q_{R2} + Q_{R3}  + ... </math>
 '''Calculated flow rates (Q<sub>R</sub>) and minimum flow levels (H<sub>fl</sub>) of selected fixtures'''

@@ Zeile 164: / Zeile 164: @@
 Determining the associated total flow rates Q<sub>R</sub>:
-<div class="mw-translate-fuzzy">
+:<math>Q_R = connected\ areas (m^2) \times (\frac {l}{s\ ha}) \times 0,006 = \_\ \_\ \_\ \frac {l}{min}</math>
 The approximate required pumping head is:

@@ Zeile 152: / Zeile 152: @@
 The approximate required pumping head is:
-<div class="mw-translate-fuzzy">
+:<math>H_{ges} = h_D + I_D \times 0.2 + 16\ m = \_\ \_\ \_\ m</math>
 (Losses in the suction line are included here)
 ==Immersion pumps for drainage==

@@ Zeile 148: / Zeile 148: @@
 The actual maximum flow rate is calculated as:
-<div class="mw-translate-fuzzy">
+:<math>Q_{SP} = 0.7 \times Q_R = \_\ \_\ \_\ \frac {l}{min}</math>
 The approximate required pumping head is: