Water distribution system handbook (part 2)
Biofilm formation and control in a model drinking water distribution system with phosphorus addition
... formation of microbial aggregates, attachment to surfaces, structural stability and spatial arrangement of biofilm structure and serve as a protective barrier against desiccation and retards access ... Biofilm formation begins with the attachment of free-floating bacterial cells to a surface And this attachment is followed by growth into a mature, structurally complex biofilm and culminates in the ... of phosphorus to DWDS has a potential to increase the bacterial cell number and deteriorate the drinking water quality In the biofilm control study, free chlorine and monochloramine were used as...
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Detection, formation and reactivity of tetravalent lead corrosion product (pbo2) and its role in water quality in drinking water distribution system
... DETECTION, FORMATION AND REACTIVITY OF TETRAVALENT LEAD CORROSION PRODUCT (PbO2) AND ITS ROLE IN WATER QUALITY IN DRINKING WATER DISTRIBUTION SYSTEM NAME: ZHANG YUANYUAN ... critical role in regulating lead contamination in drinking water, a precise and fast method for its detection is required to determine its abundance in drinking water sample and assess its bioavailability ... 95 V SUMMARY Tetravalent lead corrosion product (PbO2) formed from the chlorination of lead- containing plumbing materials (LCPMs) has been linked to lead contamination in drinking water Despite...
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Hybrid energy system evaluation in water supply system energy production: neural network approach
... power the system for pumping or turbine the flow between reservoirs, and to sell surplus energy [6] An example of a hybrid energy network, integrated in water supply system is drinking system composed ... of the electricity supply infrastructure [1] The concern with the consumption of energy in water supply systems is increasingly inducing the managers of these systems in seeking optimal solutions ... participated in the organizing committee of 8th Ibero-American Seminar of Urban Water Supply Systems – SEREA MSc Gonçalves researches aims are in energy efficiency in water systems and neural networks...
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HVAC Systems Design Handbook part 6
... website Design Procedures: Part Design Procedures: Part 165 Figure 6. 9 shows flow versus head loss (pressure drop per 100 ft) and velocity in schedule 40 steel pipe This is for water at 60 ЊF, but ... the Terms of Use as given at the website Design Procedures: Part Design Procedures: Part TABLE 6. 8 169 Iron and Copper Elbow Equivalents See Table 6. 7 for equivalent length of one elbow SOURCE: ... subject to the Terms of Use as given at the website Design Procedures: Part Design Procedures: Part 6. 7 181 Pumps Centrifugal pumps are used in HVAC systems for circulation of brine and chilled, hot,...
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HVAC Systems Design Handbook part 8
... the Terms of Use as given at the website Design Procedures: Part Design Procedures: Part 237 Figure 8. 18 Pitot-tube flow sensor V ϭ C͙VP (8. 4) where, for HVAC work, V is in feet per minute and VP ... as given at the website Design Procedures: Part Design Procedures: Part 245 Figure 8. 28 Straight-through (two-way) control valve Control valves A control valve (Fig 8. 28) includes a body, within ... Use as given at the website Design Procedures: Part 230 Chapter Eight Figure 8. 7 Bimetal temperature sensor Figure 8. 8 Spiral bimetal tem- perature sensor Figure 8. 9 Rod-and-tube temperature...
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HVAC Systems Design Handbook part 7
... at the website Design Procedures: Part Design Procedures: Part 219 Figure 7. 17 Engine driven cogeneration configured flow diagram (P&ID) for the proposed system with subsequent design for each ... The HVAC systems designer will recognize plants as potential areas of specialty experience as assignments and interest allow References ASHRAE Handbook, 2000 HVAC Systems and Equipment, Chap 7, ... reserved Any use is subject to the Terms of Use as given at the website Design Procedures: Part Design Procedures: Part Figure 7. 13b 7. 11 215 Well water based chiller heat recovery system, cooling mode...
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Datasheet - FO - Optical Distribution System - ODS 500
... Order information V tS sy ste m O rd e r n u m b e r Q ty Fram e 1 -1 pc S id e p a n e l 1 -1 pc B a c k w a ll 1 -1 pc 1 -0 1 -1 pc pc Roof 1 -1 pc Units for VtS system Order number Qty Sub-rack ... 6833 72 5-0 6 pc Cable guide unit complete* 6833 72 0-0 6 pc Cable channel unit 6833 72 8-0 6 pc Storage unit 6833 72 7-0 6 pc Sub-racks for 19" frames Order number Qty Sub-rack 6833 72 5-0 8 6833 72 5-1 8 pc ... HP (4x4)10 KRONE GmbH Beeskowdamm 3-1 1 D-14167 Berlin Telefon +49 30 845 3-1 422 Telefax +49 30 845 3-1 412 http://www.krone.com vertrieb@krone.com (98210 )-0 30 1-0 10-CVS, Subject to change The modular...
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HVAC Systems Design Handbook part 9
... Equipment: Part Equipment: Part 299 Air out Screen Condenser coil Hot gas in Liquid out Air in Figure 9. 11 Air-cooled condenser coil face area, fan airflow rate, desired condensing temperature, and design ... of Use as given at the website Equipment: Part Equipment: Part 3 09 Figure 9. 22 Partial section through a finned coil that area may look good to the designer, but the system won’t actually work ... temperature and the design ambient wet-bulb (wb) temperature This is usually between and 12ЊF, with to 10ЊF being typical 9. 6.1 Open-circuit cooling towers In Figs 9. 14, 9. 15, and 9. 16, there is only...
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HVAC Systems Design Handbook part 10
... at the website Equipment: Part Equipment: Part 355 Figure 10. 29 Psychrometric chart for Fig 10. 28, without heat recovery Figure 10. 30 Psychrometric chart for Fig 10. 28, with heat recovery Downloaded ... given at the website Equipment: Part Equipment: Part 363 Figure 10. 38 Humidifier with radiant heater Ⅲ Airflow rate: 10, 000 ft3 /min with 20 percent outside air Ⅲ At design conditions, heat loss and ... has been withdrawn but not replaced.) ASHRAE Handbook, 2000 HVAC Systems and Equipment, Chap 6, ‘‘Panel Heating and Cooling.’’ ASHRAE Handbook, 1999 HVAC Applications, Chap 32, ‘‘Solar Energy Use.’’...
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Distribution System Project
... session CÁC HỆ THỐNG FILE MẠNG (NFS) NFS hệ thống file mạng phát triển vào cuối năm 1990 SNN Microsystems thêm vào hệ điều hành SNNOS (một phiên UNIX) NFS thiết kế dùng hệ thống file mạng cục NFS ... vụ NFS cách trực tiếp qua Internet mà không cần qua máy trung gian (intermedia servers) SUN Microsystem đưa tiêu chuẩn hướng dẫn sử dụng Protocal cho NFS đặt tiêu chuẩn phạm vi công cộng (RFC-1094) ... mounted Các lệnh gọi sau dùng File Handle NFS Protocol (nfsd; rpc.nfsd): Giao thức hỗ trợ hầu hết system call Unix, ngoại trừ việc gọi lệnh “ Mở Đóng” tập tin Để đọc tập tin, Client gởi đến server...
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HVAC Systems Design Handbook part 11
... subject to the Terms of Use as given at the website Equipment: Part Equipment: Part 379 Figure 11. 11 Fan and system curves for Fig 11. 10 If no fan volume control device is used, the fan will nevertheless ... hoods and exhaust systems Laboratory and industrial fume hoods require large exhaust air quantities Several standards cover the design of some types of exhaust systems. 1,2 11. 11 Smoke Control ... website Equipment: Part Equipment: Part 371 Figure 11. 4 Zone reheat coil A single-zone unit may be used to control humidity in the room The unit is arranged as shown in Fig 11. 5 The cooling coil...
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HVAC Systems Design Handbook part 12
... Features of HVAC Systems 406 Chapter Twelve UPS systems may be a useful, even required component of a critical HVAC service and will be included in the HVAC and electric system design UPS systems ... The HVAC designer must work closely with the electrical designer to satisfy the needs of both disciplines 12. 13 Summary In building construction, HVAC design is interwoven with the electrical design, ... Features of HVAC Systems Electrical Features of HVAC Systems TABLE 12. 1 399 Electrical Voltages Nominal line voltage, V Probable service range, V Nominal motor rating, V Motor operating range, V 120 ...
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HVAC Systems Design Handbook part 13
... the Terms of Use as given at the website Design Documentation: Drawings and Specifications Design Documentation: Drawings and Specifications 13. 3.1 413 Drawing size and scale Drawing size and ... product 13. 3.9 Use of computers in drafting The use of computers in design, drafting, and specification writing has proliferated in recent years.2 Computer-aided design and drafting (CADD) systems ... subject to the Terms of Use as given at the website Design Documentation: Drawings and Specifications Design Documentation: Drawings and Specifications 13. 3.7 415 Minimize sources of information A good...
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HVAC Systems Design Handbook part 14
... building and its systems 14. 3.3 Observation of operation Many specifications require the HVAC contractor to certify in writing that the HVAC systems and controls are operating as designed and specified ... than later The designer or reviewer needs to be acquainted with the design intent in this phase of the work 14. 2.3 Work oversight and field review The designer can only expect what the designer inspects! ... review, the designer must work hard to see that equity is maintained When a design error is involved, the contractor is not interested in covering the cost, and some owners become an immediate designer’s...
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Tài liệu Spoken english elementary handbook part 1 ppt
... Lot Elementary Handbook Contents i v viii x Contents Introduction Free Copying Licence Bibliography A General Information General Information 1. 1 1. 2 1. 3 1. 6 1. 11 1 .12 1. 13 1. 14 1. 18 1. 22 1. 26 1. 27 ... www.englishbanana.com now! Talk a Lot Elementary © English Banana.com iii Talk a Lot Elementary Handbook Contents 18 .7 18 .9 18 .19 18 .25 18 .29 18 .34 18 .38 18 .46 18 .48 18 .55 18 .59 18 .62 18 .64 18 .65 ... #1 (from Book 1) End of Course Oral Examination #2 (from Book 2) End of Course Oral Examination (Example) Certificate Template #1 Certificate Template #2 1. 1 1. 2 1. 3 1. 6 1. 11 1 .12 1. 13 1. 14 1. 18...
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