Tìm kiếm cho nhanh

Nhập từ khóa vào kiếm, ví dụ: bơm, quạt, hộp số, máy nén....
Loading

6 tháng 5, 2010

Tải ebook: Nâng cao hiệu quả làm việc của hệ thống bơm (Improving Pumping System Performance)


Quick Start Guide  1
Section 1: Pumping System Basics  3
  Overview  3
  Pumping System Components  3
  Pumping System Principles  6
Section 2: Performance Improvement Opportunity Roadmap  11
  Overview  11
  The Fact Sheets  11
Assessing Pumping System Needs  13
Common Pumping System Problems  19
Indications of Oversized Pumps  25
Piping Configurations to Improve Pumping System Efficiency  29
Basic Pump Maintenance  33
Centrifugal Pumps  37
Positive Displacement Pump Applications  41
Multiple Pump Arrangements  43
Pony Pumps   47
Impeller Trimming   49
Controlling Pumps with Adjustable Speed Drives  51
Section 3: The Economics of Improving Pumping Systems  55
  Overview      55
  Conduct a Systems Assessment  55
  Analyze Life-Cycle Costs Before Making a Decision  62
  Sell Your Projects to Management  64
Section 4: Where to Find Help  69
  Overview    69
  DOE Industrial Technologies Program and BestPractices  69
  Hydraulic Institute  73
  Directory of Contacts  75
  Resources and Tools  76
Appendices   93
  Appendix A: Glossary of Basic Pumping System Terms  95
  Appendix B: Pumping System Assessment Tool (PSAT)  99
  Appendix C: Pumping Systems Tip Sheets  101
     Appendix D: Guidelines for Comments  117
List of Figures   91
  Figure 1.    Typical Pumping System Components  4
  Figure 2.    Key to the Fact Sheets  12
  Figure 3.    Illustration of the Sensitivity of Flow to 
                   Changes in Backpressure  15
  Figure 4.    Drooping Performance Curve  15
  Figure 5.    Cavitation in a Centrifugal Pump  20
  Figure 6.    Two Types of Sealing Methods: 
   Packing and Mechanical Seals  21
  Figure 7.   Common Pipe Configuration Problems 
   and How To Correct Them  30
  Figure 8.    Flow Straighteners  31
  Figure 9.  Proper Support of Suction and Discharge Piping  31
  Figure 10.   Centrifugal Pump Performance Curves  37
  Figure 11.   Family of Pump Performance Curves  38
  Figure 12.   Performance Curves for Different Impeller Sizes  38
  Figure 13.   Performance Curves for a 4x1.5-6 Pump 
   Used for Water Service   39
  Figure 14.   Multiple Pump Operation  44
  Figure 15.  Multiple-Speed Pump Performance Curves  45
  Figure 16.  Typical Tank Level Control  48
  Figure 17.  Effect of Impeller Trimming on Pump Performance  49
  Figure 18.  Effects of Reducing Speed on a Pump’s 
   Operating Characteristics  52
  Figure 19.   Power Lost through a Bypass Line  52
  Figure 20.   Fluid Power Lost across a Throttle Valve  52
  Figure 21.   Using a Pump Performance Curve 
   To Determine Power Draw  60
Download

http://www1.eere.energy.gov

0 Đánh giá:

Đăng nhận xét

Đóng góp ý kiến, bình luận của bạn tại đây