hvac systems design handbook 5th edition pdf

... impact on the design of HVAC systems Particular codes are sufficiently diverse in their adoption and im-plementation that it is unwise for this book to list any specifics The HVAC system designer should ... us of the value of continuous awareness of the physics of HVAC processes in the conduct of design work 1.2 Problem Solving Every HVAC design involves, as a first step, a problem-solving pro-cess, ... service The first is an interpretation of a mentor’s example, Trang 5the second is a publicly documented, formal procedure The HVAC system designer will benefit greatly if she or he can commit to an analytical

Ngày tải lên: 26/01/2014, 14:20

... or design office 5 Space limitations 6 Maintainability / reliability 7 Central plant versus distributed systems 8 Simplicity and controllability stood, the designer cannot provide an adequate HVAC ... acceptable (see Chap 11) Most HVAC systems for process environments have opportunities for heat reclaim and other ingenious ways of conserving energy Off-peak thermal storage systems are becoming popular ... difficult and require a thorough inquiry by the HVAC de-signer into the process and its needs Until the process is fully Trang 2under-TABLE 4.1 Criteria for HVAC System andEquipment Selection 1 Demands

Ngày tải lên: 26/01/2014, 14:20

... Source: HVAC Systems Design Handbook Chapter Design Procedures: Part Fluid-Handling Systems 6.1 Introduction All air-handling units (AHUs) and ... of Use as given at the website Design Procedures: Part Design Procedures: Part 189 ASME, Power Piping Code, ANSI / ASME B31.1-1995 ASHRAE Handbook, 2000 HVAC Systems and Applications, Chap 11, ... 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,

Ngày tải lên: 17/10/2013, 22:15

... discussion The HVAC systems designer will recognize plants as potential areas of specialty experience as assignments and interest allow References 1 ASHRAE Handbook, 2000 HVAC Systems and ... website Design Procedures: Part 5 Design Procedures: Part 5 221 ‘‘Steam Systems ’; Chap 11, ‘‘District Heating and Cooling’’; Chap 12, ‘‘Hydronic Heating and Cooling System Design ’; ... storage systems Thermal storage is typically sized on the basis of ton-hours... Chiller-based systems have been designed from 50 tons up to several thousand tons The technology for such systems

Ngày tải lên: 20/10/2013, 16:15

... other source, such as a process, an incinerator, or re-frigeration equipment Source: HVAC Systems Design Handbook Trang 2322 Chapter Ten4 Solar energy collectors, both passive and active, which ... asmuch as 15 to 20 percent of steam capacity Some industrial plantsystems are designed for 100 percent makeup sys-In small boiler systems, condensate is returned by gravity to a ceiver and then ... oxide control systemsare being marketed, but their value is limited and costs are high Theyshould be evaluated as a developing technology 10.7 Boiler Feedwater and Water Treatment Systems Hot water

Ngày tải lên: 24/10/2013, 15:15

... disadvantages as themultizone AHU Many of the older systems installed in the 1950s and1960s were designed with high-velocity / high-pressure duct systems tominimize the space occupied by the ducts ... basic concepts Single-zone and VAV systems have similar, even identical, physical arrange-ments but use different control strategies Multizone and double-ductsystems are similar in arrangement ... temperature difference between the room and supply airtemperatures (58⬚F supply air), the design flow rate of air, designated CFM, in cubic feet per minute (cfm) will be CFM⫽ ⫽ 5555 ft /min (cfm) (11.1)

Ngày tải lên: 28/10/2013, 22:15

... Handbook, 2001 Fundamentals, Chap 36, ‘‘Abbreviations and Symbols.’’ ASHRAE Handbook, 1999 HVAC Applications, Chap 38, ‘‘Computer.. .Design Documentation: Drawings and Specifications Design ... identified as being of paramount importance to the relationship between owner and con- Source: HVAC Systems Design Handbook Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) ... lack of acceptance—of the product, which is the design. Early in the development of computer-aided design (CAD) techniques, it was felt that computer- Design Documentation: Drawings and Specifications

Ngày tải lên: 07/11/2013, 19:15

... opportunities for innovative HVAC design Industrial hygiene criteria complement HVAC criteria in these environments 2.9 Designing for Operation and Maintenance Over the life of the HVAC system, the operating ... may be necessary Radiant effects are often beyond the control of the HVAC designer but should be taken into account in the HVAC design Typical radiant effects are caused by windows (cold in winter, ... No HVAC system can be designed without a thorough knowledge of how it is to be controlled Psychrometrics is helpful in control system design, since the psychrometric chart which describes the HVAC

Ngày tải lên: 26/01/2014, 14:20

... Source: HVAC Systems Design Handbook Chapter Design Procedures: Part Load Calculations 3.1 Introduction All solutions to engineering ... as given at the website Design Procedures: Part Design Procedures: Part 73 where CFM ϭ design airflow rate for cooling, ft3 /min qs ϭ sensible cooling load, Btu/h TD ϭ design temperature difference ... after the design is completed This chapter refers to a great many data tables from the ASHRAE Handbook Many of these tables require several pages in the 81⁄2-in by 11-in format of the Handbook

Ngày tải lên: 26/01/2014, 14:20

... at δ = 0° for stiffness preserving design is (17.128) which indicates, at δ = 0°, that the mass of C4T11 is equal to that of C4T10 in a stiffness-preserving design Therefore, the mass reduction ... stiffness-preserving design Therefore, the mass reduction of C4T1 i structure in a stiffness-preserving design is unlikely to happen However, if the horizontal string t h is added in the C4T11 element ... 8Figure 17.45 showing all the possible configurations of a two-stage tensegrity can be quite usefulin designing a deployable tensegrity beam made of many stages The deployment of a beam withmany stages

Ngày tải lên: 21/06/2014, 21:20

... the early design steps At any stage the use of more complex models is possible for evaluating the performance or more advanced design strategies If the design methods allow, design- by-simulation ... applicability of these systems. 14-16 12.2 Semi-Active Suspensions Design 12.2.1 Introduction SA suspensions can achieve most of the performance characteristics of fully active systems, thus allowing ... principles and design issues for SA suspension systems, which are discussed in the form of a vibration absorber and vibration isolator. 12.2.2 Semi-Active Vibration Absorption Design With

Ngày tải lên: 21/06/2014, 21:20

... external load We can loosely describe this as a robustness property, inthat the structure can be designed with a certain pretension to accomodate uncertainties in theloading (bending) environment ... analysis are intriguing The self-similar conceptcan be extended to the third dimension in order to design a realistic structure that could beimplemented in a column The chapter is arranged as follows: ... stiffness will be greater before the string is slack The compressive load in the bar, F c Fc = F/cos δDesigning the bar to buckle at this force yields where the mass of the two bars is (ρ1 = bar mass

Ngày tải lên: 21/06/2014, 21:20

... the standard synthesis of a servosystem formechanical systems However, robotic systems have some essential differences to other mechanicalsystems For example, robots have variable moments of inertia ... control systems of the newest generations of robotshave to take into account the dynamics of robots The control law which takes into account all (orsome of) dynamic forces in the robotic systems ... the joint axis increase Ifduring synthesis of servosystems we have not included the mass and the moment of inertia of thepayload, the servosystems can become underdamped which causes oscillations

Ngày tải lên: 21/06/2014, 21:20

... specific kinds of technological systems (systems with recognition © 2002 by CRC Press LLC 8596Ch24Frame Page 640 Tuesday, November 6, 2001 9:43 PM in the loop, systems with elements of learning ... diagonal dominance of convenient position control systems of industrial robots are derived in S ˇ urdilovi´c. 53 In the majority of industrial robot systems, diagonal dominance is achieved by high ... force control methods cannot be suitably applied in commercial robotic systems lies in the fact that commercial robots are designed as positioning devices. The feedback term, i.e., the signal proportional

Ngày tải lên: 21/06/2014, 21:20

... of m subsystems: (2 m – n) subsystems correspond to the powered joints modeled as in Equation (27.47), and (n – m) composite subsystems modeled as in Equation (27.56) In fact, all the subsystems ... the subsystems However, these tests require that all subsystems are stable To analyze stability of the mechanisms including unpowered joints, we introduced the so-called composite subsystems ... between subsystems ( f i ∆Pi ) are neglected): ˙ ∆x i = Ai ∆x i + bi N (t , ∆ui ) , ∀i ∈ I1 (27.62) The decoupled model of the system (Equation (27.62)) represents a set of decoupled linear subsystems

Ngày tải lên: 21/06/2014, 21:20

... panel of the CNC system Readers are referred to machine design handbooks and texts for the basics of designing stationary, are covered in this handbook 4.2 Chatter Vibrations in Cutting Machine tool ... bodies The stationary parts carry moving bodies, such as table and spindle drives They must be designed to carry large weights and absorb vibrations transmitted by the moving and rotating parts ... assembly Because the parts to be machined will vary depending on the end-user, the builder must design the machine tool structure and control of drives to deliver maximum accuracy during machining

Ngày tải lên: 02/07/2014, 12:20