Proiectare Instalatii
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PROIECTARE, CONSULTANTA SI EXECUTIE IN DOMENIUL INSTALATIILOR PENTRU CONSTRUCTII. PROIECTARE ARHITEC SOLID PROIECT S.R.L. isi desfasoara activitatea.
Proiectare, consultanta si urmarire de santier in domeniul instalatiilor pentru constructii civile si industriale, acestea sunt ramurile in care compania S.C. Avand o experinta vasta in domeniu, printr-un portofoliu care cuprinde peste 200 de proiecte din toate categoriile de cladiri (birouri, hoteluri, centre comericale, hale productie si depozitare, rafinarii, statii de epurare, locuinte individ
31/03/2020
🔵 Duct Pressure
English below ⬇️
🔵 ضغط مجرى الهواء Ducts
يتم ضغط نظام مجرى الهواء من خلال ثلاث ضغوط:
• الضغط الساكن"الاستاتيكي" Static pressure:
الضغط الساكن هو الضغط الذي يتسبب في تدفق الهواء في ال duct .
الضغط الثابت هو الدفع الخارجي للهواء مقابل أسطح مجاري الهواء وهو مقياس للمقاومة عندما يتحرك الهواء عبر جسم مثل مجرى الهواء duct .
يقاس بالبوصة من عمود الماء (in-w) ، ويعمل بشكل متساو في جميع الاتجاهات ومستقل عن السرعة ، وهو ضغط الهواء في مجرى الهواء duct ، والذي يستخدم لاختيار المروحة.
• ضغط السرعة:
ضغط السرعة هو الضغط الذي يسببه الهواء المتحرك.
وهي تساوي ناتج كثافة الهواء ومربع السرعة مقسومًا على 2.
VP = 0.5 x ρ x v2
سوف يتم استخدام VP فقط في اتجاه تدفق الهواء ويكون دائمًا إيجابيًا ، وهو الضغط الناتج عن سرعة ووزن الهواء ، والذي يستخدم لقياس التدفق (cfm) في النظام.
• الضغط الكلي:
الضغط الكلي هو المجموع الجبري لضغط السرعة والضغط الساكن.
TP = VP + SP
• TP = الضغط الكلي
• VP = ضغط السرعة
• SP = ضغط ثابت
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🔵 Duct system is pressurized by three pressures:
• Static pressure:
Static Pressure is the pressure that causes air in the duct to flow.
Static pressure is the outward push of air against duct surfaces and is a measure of resistance when air moves through an object like duct work.
Measured in inches of water column (in-w), it acts equally in all directions and is independent of velocity, It is the air pressure in the duct, which is used for fan selection.
• Velocity pressure:
Velocity pressure is the pressure caused by air in motion. It is equal to the product of air density and the square of the velocity divided by 2.
VP = 0.5 x ρ x v2
VP will only be exerted in the direction of air flow and is always positive, It is the pressure generated by the velocity and weight of the air, which is used for measuring the flow (cfm) in a system.
• Total Pressure:
Total pressure is the algebraic sum of velocity pressure and static pressure.
TP = VP + SP
• TP = Total Pressure
• VP = Velocity Pressure
• SP = Static Pressure
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