CALCULATION OF THE ECONOMIC ROOF OF THE INTERNAL WATER SUPPLY NETWORK OF THE BUILDING

Аннотация

This article discusses the basics of economic assessment of the internal water supply network of a building. In the design of internal engineering networks, ensuring not only technical, but also economic efficiency is of great importance. The article analyzes the types of investment and operating costs for the water supply system, shows their calculation methods and economic efficiency through practical examples. At the same time, recommendations are given on reducing costs through the use of resource-saving equipment, the selection of modern pipeline materials, and monitoring water consumption. The results of this study are of practical importance for engineers, design organizations, and construction specialists. Key words: Internal water supply, Water supply network, Building utilities, Economic efficiency, Cost calculation, Pipe sizing, Hydraulic calculation, Water consumption, Plumbing system design, Material cost estimation, Installation cost, Operation and maintenance cost, System optimization, Water flow rate, Pressure loss, Energy consumptionб Sustainable water systems. INTRODUCE The internal water supply system of a building must be properly designed not only from a technical point of view, but also from an economic efficiency point of view. Economic calculations help to estimate the cost of the project, select the most efficient equipment and materials, and reduce long-term operating costs. Выпуск журнала №-24 Часть–3_ Апрель –2025 165 MODERN EDUCATION AND DEVELOPMENT 1. Basic expenses types Internal water supply system for expenses investment ( one multiple ) and operational ( periodic ) to expenses is divided into : Investment expenses : Pipes (PVC, polypropylene, metal) Fittings ( valve , faucet , filters ) Sanitary equipment (shower, toilet, sink) Schyotchiks , valves , welding equipment Design and installation workforce Operational expenses : Water for payment ( water) depending on consumption ) Pump power ( if applicable) Technical service to show and repair Losses and water waste control 2. Calculation methods ✅ Water supply system calculate the investment value Csystem =∑ i = 1n( Cmaterial_i+Cassembly_i )C_{ system } = \sum_{ i =1}^{n} (C_{material\_ i } + C_{ assembly \_ i }) Csystem = i = 1 ∑ n ( Cmaterial_i + Cassembly_i ) This on the ground : C_{ material_i } – material price for each element ; C_{ montage_i } – went to the installation expenses . ✅ Promising water expense and t bill of payments ( annual ) Qyear=Qday ⋅ 365Q_{ year } = Q_{ day } \ cdot 365 Qyear = Qday ⋅ 365 Tsuv=Qyil ⋅ TnarxT_ { water } = Q_{ year } \ cdot T_{ price } Tsuv = Qyil ⋅ Tnarx This on the ground : Q_{ daily } – daily water consumption (m³); T_{ price } – 1 m³ of water price ( for example , 2000 soums ); T_{ water } – annual water for payment . Выпуск журнала №-24 Часть–3_ Апрель –2025 166 MODERN EDUCATION AND DEVELOPMENT 3. A practical example ( for example , a 5-story house for ) Information : 20 households in the house ; Each 150 l/day of water in the apartment expense ; 1 m³ of water price : 2000 sum ; 300 meters of pipe are needed , 1 meter costs 40,000 soums ; Installation work : 50,000 soum / meter Выпуск журнала №-24 Часть–3_ Апрель –2025 167 MODERN EDUCATION AND DEVELOPMENT 1. In the building daily water consumption : - average daily spending : Выпуск журнала №-24 Часть–3_ Апрель –2025 168 Q to t o 'r .k u n  ( q to t o 'r .k u n .1  U 1  q to t o 'r .k u n .2  U 2  . . . . . .  q to t o 'r .k u n .n  U n  q to t a s f  F a s f  q to t y a s h .m a y  F y a s h .m a y ) / 1 0 0 0 , m 3 /day Qtot  (250*11312*5 250*556*908*100.5*6500 o'r.kun  4.5*3500)/1000 65.70m3/kun Q ho 'r .k u n  ( q ho 'r .k u n .1  U 1  q ho 'r .k u n .2  U 2  . . . . . .  q ho 'r .k u n .n  U n  q ha s f  F a s f  q hy a s h .m a y  F y a s h .m a y ) / 1 0 0 0 , Q ho 'r .k u n  ( 1 0 5 * 1 1 3  5 * 5  6 5 * 5  3 3 * 9 0  5 * 8 ) / 1 0 0 0  1 5 . 2 2 5 m 3 /day Q co 'r .k u n  ( q co 'r .k u n .1  U 1  q co 'r .k u n .2  U 2  ......  q co 'r .k u n .n  U n  q ca sf  F a sf  q cya sh .m a y  F ya sh .m a y ) / 1 0 0 0 , Q co 4 'r .k . 5 u n * 3 5 ( 1 0 4 0 5 ) * / 1 1 0 1 0 3 0 7 5 * 0 5 . 4 7 1 1 8 5 * 5  2 3 * 9 0  7 * 8  0 . 5 * 6 5 0 0 m 3 /day − maximum daily spending : MODERN EDUCATION AND DEVELOPMENT Выпуск журнала №-24 Часть–3_ Апрель –2025 169 Q to t m ax .k u n  ( q tom tax .k u n .1  U 1  q tom tax .k u n .2  U 2  ......  q tom tax .k u n .n  U n  q to t a sf  F a sf  q to t ya sh .m a y  F ya sh .m a y ) / 1 0 0 0 , m 3 /day Q to m 4 ta x . 5 .k u * n 3 5 0 ( 0 3 ) 0 / 0 1 * 0 1 0 1 0 3 7 1 1 6 . 7 * 5 5 8  2 5 0 * 5  6 0 * 9 0  1 6 * 8  0 . 5 * 6 5 0 0 Q hm ax .k u n  ( q hm ax .k u n .1  U 1  q hm ax .k u n .2  U 2  ......  q hm ax .k u n .n  U n  q ha sf  F a sf  q hya sh .m a y  F ya sh .m a y ) / 1 0 0 0 , m 3 / day Q hm a x .k u n  ( 1 2 0 * 1 1 3  7 * 5  6 5 * 5  3 5 * 9 0  7 * 8 ) / 1 0 0 0  1 7 . 1 2 6 Q cm a x .k u n  ( q cm