Water supply and sewerage of mall

Contents

Contents

1 General part

2 System B1 4-

3 System B

4 T3 system, T4 7-

5 System K

6 System K

7 System K

8 K3 system.

9 Main technical and economic indicators of water consumption and water disposal

10 Attachments

EXPLANATORY NOTE

General part

The project was developed on the basis of:

- Design assignment of SARK LLC

- Specification for Connection to Public Water Supply and Sewerage Systems of State Unitary Enterprise "VODOKANAL of St. Peteburg" No. 984855/106 dated 20.08.04

- Architectural and construction drawings

- SNiP 2.04.01 85 * "Internal water supply and sewerage of buildings"

Design Input:

1. Object Name - Commercial Complex

2. Address - St. Petersburg, Primorsky district, Lake Dolgoy, quarter 24A, on the stain of the building.

19 and 20 (south of 20, building 1 along Sizov Street)

3. Total building volume - 42247.0 m3

4. Building area - 3619.2 m2

5. Fire resistance rating of the building - II

6. Fire Hazard Room Category - B2

7. Structural fire hazard class - CO

8. Guaranteed head in the water supply network - 30.0 m.v.

9. Operating mode - 1 shift

10. Name and number of consumers are given in

"Water Consumption and Disposal Balance Sheet"

The following water supply and sewerage systems have been developed in the project:

- B1 host-drinking water supply system

- B2 fire-fighting water supply system

- T3 system, T4 hot water supply, circulation

- domestic sewage system K1

- K2 rain sewage system

- K3 industrial sewage system from cafe

- K3.1- production and drainage sewage system

B1 system

Water consumption is provided from the public water supply system, from the intra-quarter network F200. On input to the building of F100, in water-measuring knot the water-measuring knot with bypass F100 line, with the counter of a consumption of BCX 20 water on fig. of TsIRV02A.00.00.00., sheet 58, 59 is established.

Technical characteristics of the meter:

VSH-20 counter:

Qmax = 5.0 m3/h, Qn = 2.0 m3/h, Qmin = 0.05 m3/h

VSH-50 counter:

Qmax = 30.0 m3/h, Qn = 12.0 m3/h, Qmin = 0.3 m3/h

Pressure losses in VSKh-20 counter

H=S∙q2, h=5.18∙ (0.58) 2 = 1.74 m < 5.0 m

q - maximum-second consumption for household drinking needs for input.

q = 0.58 l/s

Gate valve with electric engine 30ch906br F100 (power of electric engine - 0.18 kW) is installed on the bypass line of the water metering unit, the gate valve opens automatically from the buttons near the fire crane.

Number of inputs to the building - 2.

Water metering unit is installed at each water supply inlet

(refer to drawing 1.01.06VK, sheet 2).

Water mains calculation

Source Data:

Personnel U1 = 24 people/see, 24 people/hour, N1 = 15

Workers U2 = 4 people/cm., 4 people/h, N2 = 2

Café U3 = 450 bl/cm, 60 bl/hr, N3 = 8

Sun. nodes for visitors - U4 = 1500 people/see, 130 people/hour, N4 = 16

Probability of device action

Maximum-second flow rate

qo=5∙0.11∙1.046=0.58 l/s

Probability of using devices

P1=, N1∙P1=0.8

P2=, N2∙P2=0.5

P3=, N3∙P3=0.3

P4=, N4∙P4=3.92

Rosch. =, α = 2.726

Maximum-hour consumption for household and drinking needs

q=0.005∙81.92∙2.726=1.12 m3/hour

Required head at input for household and drinking needs

Npotr. = Nzagl. + Nsopr. + N gey. + NPR. + Nizl. + Nsch.

Nzagl - depth of external water supply network, Nzagl. = 2.0 m

Nsopr - head losses in the network along the length, on local resistances

Pump = i ∙ (1 + k1), k1 = 0 .3- for host-drinking water supply

for pipes F100, l = 21.0 m Nsopr = 0.03, for pipes F25 l = 53.0 m Nsopr = 9.2, for pipes F20 l = 16.0 m

Nsopr. = 0.83

Nsopr. Commonly = 10.06 m

H geom.- geometric height of water rise, H geom. = 5.40 m

Np - height of device installation from the floor level of the last floor,

Np = 1.0 m

Low - pressure on the discharge, Low = 3.0 m.v.

Nsch. - losses of a pressure on the counter

Nsch.=5.18∙0.582= 1.74 m

The required head for household drinking needs is:

Npotr. = 2.0 + 10.06 + 5.40 + 1.0 + 3.0 + 1.74 = 23.2 mv.

Guaranteed head in the city network - 30.0 m.v., additional installation of head pumps is not required.

.

Pipe material:

Steel water and gas pipes galvanized in insulation F32 GOST 326275 main network.

Metal-plastic pipes F25, F20 GOST 185992001 connections to san. instruments.

3. B2 system

The project develops internal and external fire extinguishing of the building.

Internal fire extinguishing - from fire cranes, the number of fire cranes - 38.

Flow rate for internal fire extinguishing - 5.0 l/s (2nd jets by 2.5 l/s).

External fire extinguishing is provided from 2 fire hydrants installed on the intra-quarter water supply networks (see section "NVK").

The distance from fire hydrants to the most remote part of the building shall not be more than 200 m.

External fire extinguishing flow rate - 25.0 l/s.

Connection is provided from the designed inputs of the F100 water pipeline, through the bypass line of water metering units.

The F100 backbone network loops inside the building. Separation valves are installed on the ring.

To maintain pressure in the network in the room of the water metering unit, it is provided to combine with the host-drinking water supply system.

Automatic fire extinguishing is not provided (see section "Fire prevention measures").

Required head at fire input

Calculation of the required head in case of fire is made for the most remote fire crane PK11, 12 F50 installed on the 2nd floor of the building.

Npotr. = Nzagl. + Nsopr. + N geom. + Npr + Nkr. + Nch.

Nzagl - depth of external water supply network, Nzagl. = 2.0 m

Nsopr - head losses in the network along the length, on local resistances

Pump = i l∙ (1 + k1), k1 = 0 .1- for fire water supply

for pipes F100, l = 152.0 m Nsopr = 0.84, for pipes F80 Nsopr = 0.02 m

Nsopr. Commonly = 0.86 m

H geom.- geometric height of water rise, H geom. = 5.40 m

Np - height of fire crane installation from the floor level of the last floor,

Np = 1.35 m

Nkr. - pressure at the fire crane

Nkr. = 10.4 m.v.s., at fire hose length - 20 m and nozzle diameter - 19 mm

The required head in case of fire is:

Npotr. = 2.0 + 0.86 + 5.40 + 1.35 + 10.4 = 20.01 mv.

Guaranteed head in the water supply network - 30.0 m.v., no additional installation of head pumps is required.

Pipe material:

Pipes steel el. welded F108h4, F89h3, F57h3 GOST 1070476.

T3 system, T4

Water consumption - from heat networks.

The backbone network is designed with circulation.

Hot Water Supply (HWS) Calculation

Source Data:

Personnel U1 = 24 people/see, 24 people/hour, N1 = 7

Workers U2 = 4 people/cm., 4 people/h, N2 = 1

Café U3 = 450 bl/cm, 60 bl/hr, N3 = 8

Sun. nodes for visitors - U4 = 1500 people/see, 130 people/hour, N4 = 8

Probability of instrument action is determined by formula:

Rohsch. = ,

α=0.815

q0=0.1

Maximum-second flow rate

q=5∙0.1∙0.815=0.41 l/s

The probability of using devices is determined by the formula:

The maximum hourly flow rate of water in m3/h is determined by the formula:

The average hourly flow rate of water in m3/h is determined by the formula:

T - operating time of T = 12 hours

Heat flow during the middle hour is determined by the formula:

Qht- heat loss in supply and circulation pipeline

Qht = 1.16 ּ0.24 ּ60 = 16.70 kBT/hour = 14359.4 kcal/hour

Qht = 0.05 ּ14359.4 = 718 kcal/hour

QTh = 14359.4 + 718 = 15077.4 kcal/hr.

Heat flow during maximum hour is determined by formula:

Heat consumption at GVA 34828.1 kcal/hour is accepted.

Calculation of Hot Water Supply Network

Head losses in the network sections taking into account pipe overgrowing are determined by the formula

Head loss on supply network

in section F32, q = 0.41 l/s, v = 0.50 m/s, l = 50.0 m

N=0.022∙50∙1.2=1.32 m

in section F32, q = 0.34 l/s, v = 0.50 m/s, l = 50.0 m

N=0.018∙50∙1.2=1.08 m

in section F20, q = 0.17 l/s, v = 0.62 m/s, l = 7.0 m

N=0.074∙7.0∙1.2=0.62 m

N=1.32∙1.08∙0.62=3.02 m

Head loss on circulation network

in section F20 q = 0.02 l/s, v = 0.53 m/s, l = 100.0 m

N=0.055∙100∙1.2=6.6 m

Total losses on hot water water mains

Total = 3.02 + 6.6 = 9.62 m

Required head at WAN input

Npotr. = H gem. + Npopr + Npr. + Np.

H geom.- geometric height of water rise, H geom. = 9.15 m

Nsopr - head losses in the network along the length, on local resistances

General = 9.62 m

Np - height of device installation from the floor level of the last floor,

Np = 1.0 m

Low - pressure on the discharge, Low = 3.0 m.v.

The required head is:

Npotr. = 9.15 + 9.62 + 1.0 + 3.0 = 22.77 mv.

Pipe material:

Steel water and gas pipes galvanized in insulation F32 GOST 326275 main network.

Metal-plastic pipes F25, F20 GOST 185992001 connections to san. instruments.

K1 system

Designed to divert effluents from the sun. catch of the building into the on-site network of the general alloy sewage system.

Pipe material:

- PVC 110, 50 pipes as per GOST 22689.2089.

K2 system

Rain drains from the roof of the building are drained through internal drains to the on-site network of the general alloy sewage system.

Calculation of rain runoff from the roof of the building:

Rainwater flow rate, l/s, is determined by the method of limit intensities by the formula :

,

where is the average value of the coefficient characterizing the surface of the drain basin (defined as a weighted average value depending on the coefficients z characterizing the surface and taken according to Tables 9 and 10;

z = 0.32 - for roof of buildings (Table 10);

tr - estimated duration of rainwater flow = 5 min;

A is a parameter calculated by the formula:

,

where is the intensity of rain, l/s per 1 ha, for a given area of ​ ​ 20 minutes

at P = 1 year; (drawing 1 (2)); = 60L/s;

n is a parameter as defined in Table 4 (2); n = 0,62;

P - period of single excess of estimated rain intensity (item 2.13 (2)); P = 0.5;

- average amount of rain for 1 year (Table 4 (2)); = 120;

γ - degree index accepted as per Table 4 (2); γ = 1,33;

=312,21,

Specific rainwater flow rate at = 0.32 for roof of buildings:

= 45.77 l/s with 1 ha

F = 0.3505 ha

Maximum second flow Q = 16.04 l/s

Pipe material:

- PVC 110 pipes (pressure free) as per GOST 22689.2089 connection of gutters

- PVC 250 pipes (pressure) as per GOST 22689.2089 risers, outlets

- pipes steel el. welded F219h6 in accordance with GOST 1070476 suspended sites.

K3 system

Designed to divert effluents from the production premises of the cafe to the on-site network of general alloy sewage.

In accordance with the process specification, there is no cooking technology in the production rooms. The cafe specializes in the production of a limited range of dishes from semi-finished products of a high degree of readiness. Drains come from dishes washing, utility containers.

Connection to on-site networks is provided without additional installation of fat trap.

Pipe material:

- PVC 110, 50 pipes as per GOST 22689.2089.

K3.1 system

Designed to drain effluents from the drainage pit in the heat center located in the basement.

The project adopted a forced sewage system.

Discharge of effluents from the pit is provided by means of submersible pump KR 150 A1, Grundfos, power of electric dv.- 0.3 kW.

The effluents are discharged to the sewer riser St. K12.

Pipe material:

- pipes PND 50T GOST 185992001.

Main technical and economic indicators of water consumption and

Water disposal:

Water consumption for household drinking needs - 7.56 m3/day.

Water disposal of household effluents - 7.39 m3/day.

Maximum-hour water flow per household-drinking needs - 1.14 m3/h.

Maximum-second water flow for household and drinking needs - 0.58 l/s

Flow rate for internal fire extinguishing of the building - 5.0 l/s (2nd jets by 2.5 l/s)

External fire extinguishing flowrate - 25.0 l/s, building volume - 42247.0 m3

Maximum hourly heat consumption at HVAC taking into account heat loss 34828.1 kcal/h.

Average hourly heat consumption per GVA taking into account heat loss of 15077.4 kcal/h.

Required head for household and drinking needs - 23.2 m.v.

Required head in case of fire - 20.01 m.v.

Rain flow rate from the roof of the building - 16.04 l/s (roof area - 3505 m2)

Applications:

Water Consumption and Water Disposal Balance Table

Certificate for hot water supply code 1.01.06VK, PS