lpg gas calculation

PLUMBING DESIGN CALCULATIONS

MOIZFP PROJECT NO. R9808/2170 1

TABLE OF CONTENTS

No of pages

REFERENCES 1

ABBREVIATIONS 1

FIXTURE COUNT 2

ELECTRIC WATER HEATER SIZING 22

SIZING OF POTABLE, IRRIGATION AND NON-POTABLE WATER PUMP 3

SIZING OF FIRE&POTABLE, NON-POTABLE AND IRRIGATION WATER TANK 2

SIZING OF FIRE PUMP 1

SIZING OF SEWAGE HOLDING TANK 1

HYDRAULIC CALCULATIONS & SIZING POTABLE WATER SYSTEM 1

HYDRAULIC CALCULATIONS & SIZING NON-POTABLE WATER SYSTEM 1

ISOMETRIC DIAGRAM & SIZING (POTABLE & NON-POTABLE WATER SYSTEM) 2

IRRIGATION SYSTEM PIPE SIZING 1

SOIL PIPE SIZING 1

WASTE PIPE SIZING 1

ROOF DRAINAGE PIPE SIZING 10


MOIZFP PROJECT NO. R9808/2170 1

REFERENCES

1- SASO - SAUDI ARABIAN STANDARD ORGANIZATION

2- ANSI - AMERICAN NATIONAL STANDARD INSTITUTE

3- UPC - UNIFORM PLUMBING CODE

4- NPC - NATIONAL PLUMBING CODE

5- UBC - UNIFORM BUILDING CODE

6- ASTM - AMERICAN SOCIETY FOR TESTING AND MATERIAL

7- ASHRAE - AMERICAN SOCIETY OF HEATING REFRIGERATION

AND AIR CONDITIONING ENGINEERS

8- PRACTICAL PLUMBING DESIGN GUIDE


3

GAS DEMAND

BUILDING NO. 2

1.) DESIGN DATA:

NO. OF LABORATORY OUTLET = 104

LOAD PER OUTLET = 5000 BTU/HR

SIMULTANEOUS USED FACTOR = 50%

HEATING VALUE = 2516 BTU/FT3

AVERAGE DAILY TIME USED = 1.5 HRS.

2.) CALCULATIONS:

TOTAL LOAD

(104 OUTLETS x 5000 BTU/FT3) = 520,000 BTU/FT3

CONSUMPTION

520,000 = 206.6772655008 FT3/HR

2516

CONSUMPTION WITH USE FACTOR

206.677 FT3/HR @ 50% = 103.3386327504 FT3/HR

TOTAL LPG CONSUMPTION

103.33 FT3/HR X 1.5 HRS. = 155.0079491256 FT3

SAY 160 CUBIC FEET

ADOPT PIPE SIZE OF 50MM DIA.


SIZING OF CENTRALIZED LPG TANK

DESIGN BASIS:

LABORATORY OUTLET= 5000 BTU/HR

KITCHEN OUTLET OUTLET= 35000 BTU/HR

A) TABULATION OF DAILY CONSUMPTION:

OUTLET RATING TOTAL TOTAL

BUILDING 2 = 104.00 5000.00 520000 780000 BTU

BUILDING 5 = 752.00 5000.00 3760000 5640000 BTU

BUILDING 7 = 320.00 5000.00 1600000 2400000 BTU

BUILDING 8 = 485.00 5000.00 2425000 3637500 BTU

BUILDING 9 = 234.00 5000.00 1170000 1755000 BTU

BUILDING 10 = 115.00 5000.00 575000 862500 BTU

BUILDING 11 = 706.00 5000.00 3530000 5295000 BTU

BUILDING 32 = 24.00 35000.00 840000 2100000 BTU

13900000 21690000

B) SIZING OF LPG TANK:

TOTAL BTU RATING = 21690000 BTU

(INCL.DAILY AVERAGE USE)

LPG HEATING VALUE = 91,547 BTU/HR

REQUIRED DAILY STORAGE = 236.92748 GALLONS

LPG TANK CAPACITY = 7107.8244 GALLONS (WATER CAPACITY)

(30 DAYS STORAGE)

USE 8 NOS. OF 1000 GALLONS CAPACITY (GASCO STANDARD TANK)


8

HEAD LOSSES CALCULATION

FROM NODE 1 TO 3

A.) DESIGN BASIS:

Pipe sizes are based on Table 4-26-Data for sizing Gas piping

(See attachment-Plumbing Design Guide from Building Sytem Design)

B.) TABULATIONS:

Node pipe dia. Pipe Length Pipe Length Load Hf hf (total friction loss)no. (mm) m ft cfh per 100 ft kPa1 0 0 0 - - 0.002 75 885 2902 160 0.005 0.153 100 507 1663 1120 0.01 0.17

B.) PRESSURE CALCULATIONS:

PIPE FRICTION LOSS = 0.31 inch water col.

LET; FITTING LOSSES = 0.034 10% of total head losses

STATIC HEAD LOSS = 0.1 inch water col.

TOTAL HEAD LOSS = 0.45 inch water col.

HEAD LOSSES CALCULATION

lpg gas calculation

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