Quản trị diễn đàn(|Quản trị diễn đàn | Quản trị diễn đàn | Quản trị diễn đàn | )Tổ chức Câu lạc bộ(|Tổ chức Câu lạc bộ | Tổ chức Câu lạc bộ | Tổ chức Câu lạc bộ | Tổ chức Câu lạc bộ | Tổ chức Câu lạc bộ | )Hoạt động sinh hoạt thường kỳ(|Hoạt động sinh hoạt thường kỳ | Hoạt động sinh hoạt thường kỳ | Hoạt động sinh hoạt thường kỳ | Hoạt động sinh hoạt thường kỳ | Hoạt động sinh hoạt thường kỳ | Hoạt động sinh hoạt thường kỳ | Hoạt động sinh hoạt thường kỳ | )Chuyên đề câu nhóm(|Chuyên đề câu nhóm | Chuyên đề câu nhóm | )Thành viên thảo luận(|Thành viên thảo luận | Thành viên thảo luận | Thành viên thảo luận | Thành viên thảo luận | Thành viên thảo luận | )Hồ câu liên kết & Shop kinh doanh(|Hồ câu liên kết & Shop kinh doanh | Hồ câu liên kết & Shop kinh doanh | Hồ câu liên kết & Shop kinh doanh | )Danh sách Hội viên

Diễn đàn Diễn đàn > Tổ chức Câu lạc bộ > Phòng truyền thống
  Chủ đề kích hoạt Chủ đề kích hoạt RSS Feed: No person should ever forget the birthday day
  Trợ giúp Trợ giúp  Tìm kiếm trên diễn đàn
  Nếu đây là lần đầu tiên của bạn,. Bạn có thể phải đăng ký trước khi bạn đăng bài.
Để bắt đầu xem bài viết, chọn diễn đàn mà bạn muốn ghé thăm từ sự chọn lựa bên dưới..
Tên thành viên    Mật khẩu      Tự động đăng nhập             

No person should ever forget the birthday day


 Gửi tiếp Gửi tiếp
Author
meichangsu520 Xem từ trên xuống
Đại úy
Đại úy


Ra nhập: 31/tháng năm/2017
Online Status: Offline
Tin bài: 253
  Trích đẫn meichangsu520 Trích đẫn  Gửi tiếpReply Direct Link To This Post Topic: No person should ever forget the birthday day (đã có 37 lượt xem và 0 bài trả lời) 
    Posted: 06/tháng mười một/2017 vào lúc 00:47



Ventilation fans are tested using procedures specified by Air Movement and Control Association International Inc. (AMCA) Cheap NBA Jerseys Free Shipping , Illinois, USA. The fan under test is mounted near the outlet of the test rig and air in-flow through the rig is varied by the movable gate assembly situated at the other end of the test rig.

Fan efficiency is defined as the ratio of air power (output) to shaft power requirement (input). An optimally designed fan impeller with improved aerodynamics requires less shaft input power for desired delivery of air volume with total pressure rise as per the system requirement. With reduced shaft power requirement, there is a commensurate reduction in energy consumption.

In a typical axial fan, the effective progress of the air is straight through the impeller at a constant distance from the axis. The primary component of blade force on the air is directed axially from inlet to outlet and thus provides the pressure rise by a process that may be called direct blade action.

The blade force necessarily has an additional component in the tangential direction, providing the reaction to the driving torque : this sets the air spinning about the axis independently of its forward motion.

The air delivering capacity of axial flow fans ranges from 100 to 500,000 cubic feet per minute (3 Cheap NBA Jerseys From China ,000 to 15,000 cubic meters per minute). Impellers usually have blades with airfoil cross-sections.

As compared to curved sheet blades, aerofoils can apply greater force to the air, thereby increasing maximum pressure and can maintain better efficiency over a wider range of volumetric flow. Also by increasing the thickness & curvature of the inner sections, the blades can be made stiffer, this limits flutter and allows the impellers to be run at higher speeds.

Selection of a a right fan one should consider such factors like cost optimization Cheap NBA Jerseys China , power rating & noise levels govern the selection of a fan suitable for a given application. Various combinations are possible to meet any given duty or operating requirements for best performance, lesser noise, power and cost characteristics.

Once the volume of airflow and the static pressure of the system are known, it is possible to specify a fan. The governing principle in fan selection is that any given fan can only deliver one flow at one pressure in a given system. To select a fan one must consider the following parameters:

- total airflow required

- total operating pressure

- fan installation space

Thus the fan efficiency is directly contingent upon selection of fan and the operating point relevant to the system resistance.

The way fan impellers (blades or rotors) are designed, the amount of air they can move decreases as the pressure they are working against increases.

The airflow vs. pressure information for a particular fan is called the fan performance data. The performance of a fan depends on the size, shape & speed of the impeller. The fan performance data is essential for selecting fans as per the desired airflow and system pressure.

The airflow through the rig is determined by measurement of the pressure differential and simultaneous readings are taken of the static pressure developed by the fan Cheap NBA Jerseys , air velocity at the exit side, power consumed by the fan driving motor etc.

Fan performance curves and data show how much pressure and airflow a given fan can produce at a given speed. This data is based on the system resistance (pressure) occurring away from the fan. Fan performance curves are developed by fan manufacturers based on the testing of a prototype fan fabricated based on the theoretical design.

The axial flow fans are widely used for providing the required airflow for heat & mass transfer operations in various industrial equipment and processes. These include cooling towers for air-conditioning & ventilation, humidifiers in textile mills, air-heat exchangers for various chemical processes, ventilation & exhaust as in mining industry etc. All the major industries use large number of axial flow fans for operations, such as :

- Power generation

- Petroleum refining & petrochemicals

- Cement industry

- Chemicals & pharmaceuticals production

- Fertilizer production

- Mining manufacturing

- Humidification in textile mills

- building Ventilation Cheap Jerseys China Free Shipping , etc..

Additional information can be found at the CB Blower Company web site http:www.cbblowerinquiry.

Oleg Chechel
Industrial Ventilation Specialist
Industrial Pressure Blower Co.
http:www.cbblowernews
http:www.cbblowerhvac [鏍囩:鏍囬] [鏍囩:鍐呭] The city of Guwahati is located in the Eastern region of the country. It is situated in the Indian state of Assam. It is the largest city of Assam and well known as the fast developing region of the state. Guwahati was formerly known as Pragjyotishpura and Durjoya. It is an ancient city and has significant past history. The city of Guwahati is also referred as the Gateway to the Eastern India. Due to its prominent and significant location as well as due to its rapid development, Guwahati has become the main junction of trade, finance, commerce and other developments. This city has a beautiful city location and is full with lush green trees. A pollution free zone and beautiful tourism locations often attract tourists from various locations and places. Many ancient Hindu temples are also situated in the city.

In the past few decades this region has developed impressively and has proved its mettle in every field of work and development. Till date Guwahati has established a good number of small, medium and large scale indust. Wholesale Jerseys   Wholesale Jerseys   Wholesale Jerseys   Wholesale Jerseys From China   Wholesale NFL Jerseys   Wholesale NFL Jerseys   Cheap NBA Jerseys   Cheap Jerseys From China   Cheap NFL Jerseys   Cheap NFL Jerseys Wholesale 
Back to Top
 Gửi tiếp Gửi tiếp

Chuyển đến Diễn đàn Quyền Xem từ trên xuống



Trang này được tạo ra trong 0.203 seconds.
cho thuoc 24h Bao hiem online,cong ty bao hiem    |   

Tổng số lần truy cập vào diễn đàn: 38008755 (lượt truy cập)


You are browsing this site with: CCBot/2.0 (http://commoncrawl.org/faq/)
Your IP address is: 54.227.127.109
The DNS lookup of the IP address is: 54.227.127.109
The method used to call the page: GET
The server's domain name: www.clbcaucatrangan.com
This link

[Free Express Edition]
Copyright ©2010-2011 Web Wiz
Soi Than ,
Hang nhap khau chau au Son color 8 Tri tao bon