... mill base. Roll Forming Mill 2 -19 15.3 Pull-ThroughMills: Nondriven Rolls 15-5 15.4 Tension Roll Forming 15-6 15.5 Combining Roll Forming and Cold Drawing 15-7 15.6 Developing NewRollForming Methods ... 11-19 11.5 Computerized Design System for Roll Profiles 11-29 11.6 CAE for Roll Forming 11-34 12 Acquiring Roll Forming Lines, Education, and Training George T. Halmos 12-1 12.1 WhyRoll Form Products? ... for Conventional Roll Forming Lines 15-16 15.17 Computer-Controlled Roll Forming Lines 15-16 References 15-17 Appendices A-1 References R-1 Index I-1 Contents xiii Preface Roll forming has asignificant...
Ngày tải lên: 12/07/2014, 02:20
ACI structural engineering handbook 04 structural concrete design
Ngày tải lên: 17/08/2013, 12:06
HVAC Systems Design Handbook part 6
... Btu /(lb ⅐ ЊF). For design purposes, this value can be used without significant error. The density of water varies from 62.3 lb/ft 3 at 70ЊF to 60.1 lb/ft 3 at 200ЊF. Fo r HVAC design purposes, the ... system pressure drop at the design flow rate. Losses include pipe, valves, fittings, control valves, and equipment such as heat exchangers, boilers, or chillers. The design operating point or a ... the website. Design Procedures: Part 4 177 Figure 6.21 Tank at pump suction, pumping away from boiler. Figure 6.22 Tank at pump discharge, pumping into boiler. (Not recommended.) Design Procedures:...
Ngày tải lên: 17/10/2013, 22:15
HVAC Systems Design Handbook part 8
... controlled device to achieve the set point in the controlled variable. An indirectly controlled system uses an input which is independent of the controlled variable to po- sition the controlled ... as given at the website. Design Procedures: Part 6 227 Figure 8.4 Proportional control, stable. O ϭ A ϩ Ke (8.1) p where O ϭ controller output A ϭ constant equal to controller output with no error ... band), which is the range of controller output necessary to drive the controlled device through its full cycle (open to closed, or full speed to off). Modulating controllers may use one mode or a...
Ngày tải lên: 20/10/2013, 16:15
HVAC Systems Design Handbook part 7
... in smaller distribution pipe. Pumping and control may be simplified. System design pressures are similar as for high- Design Procedures: Part 5 Downloaded from Digital Engineering Library @ McGraw-Hill ... as given at the website. Design Procedures: Part 5 221 ‘‘Steam Systems’’; Chap. 11, ‘‘District Heating and Cooling’’; Chap. 12, ‘‘Hydronic Heating and Cooling System Design ’; and Chap. 14, ‘‘Medium ... ‘‘Medium and High Temperature Water Heating Systems.’’ 2. ASHRAE Handbook, 1999 HVAC Applications, Chap. 33, ‘‘Thermal Storage.’’ Design Procedures: Part 5 Downloaded from Digital Engineering Library...
Ngày tải lên: 20/10/2013, 16:15
HVAC Systems Design Handbook part 9
... informa- tion to assist designers. However, designers must take care to ensure that they, and not the manufacturer, control the final system design. References 1. F. Beseler, ‘‘Scroll Compressor Technology ... density ratio at the design elevation (see Sec. 4.5 and Fig. 4.5). For example, the air density ratio at 5000 ft is 0.826. 2. Select the coil with a face area appropriate to the design (high- altitude) ... Co., 1998, Mission, KS. 3. ASHRAE Handbook, 2001 Fundamentals, Chap. 19, ‘‘Refrigerants,’’ and Chap. 20, ‘‘Thermophysical Properties of Refrigerants.’’ 4. ASHRAE Handbook, 1998 Refrigeration, Chap....
Ngày tải lên: 24/10/2013, 15:15
HVAC Systems Design Handbook part 10
... source, such as a process, an incinerator, or re- frigeration equipment Source: HVAC Systems Design Handbook Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright ... cost of solar heating systems. For a full discussion of solar heating design, see the chapter on solar energy in the ASHRAE Handbook. 6 Do not take this brief paragraph as understated Equipment: ... increased and controlled by adding heat- ers, either immersion heaters in the pan (Fig. 10.37) or radiant heat- ers mounted above the pan (Fig. 10.38). The evaporation rate is con- trolled by cycling...
Ngày tải lên: 24/10/2013, 15:15