1、AI)II.:NIURI ?1?0 AH1 S?I?ANI)AItI 410-2001 RIAY 2002 Replace the second sentence of Section 6.4.1 of ARI Standard 410-2001 with the following: Published values of air-side pressure drop, under test, shall not be exceeded by more than lo%, or 0.05 in H20 12.5 Pa, whichever is greater. Copyright Air-
2、Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2001 STANDARD for Al R-CON DITION I NG classifications; test requirements; rating requirements; minimum data requirements for Published Ra
3、tings; symbols and units; reference properties and conversion factors; marking and nameplate data; and conformance conditions. 1.1.1 Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. 1.1.2 Review and Amendment.
4、This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to Forced-Circulation Air-Cooling and Air-Heating Coils, as defined in Section 3 and classified in Section 4 of this standard, and for application under non-frosting conditions.
5、 This standard documents a fundamental means for establishing coil performance by extension of laboratory test data to other operating conditions and other coil sizes and row depths. Section 3. Definitions All terms in this document shall follow the standard industry definitions in the current editi
6、on of ASHRAE Terminology of Heating, Ventilation, Air Conditioning and Refrigeration unless otherwise defiied in this section. 3.1 Coil Line. For the purpose of this standard, a coil line is defiied as having the following in common: a. Fluid (volatile refrigerant, water, steam or aqueous ethylene g
7、lycol solution) b. Tube size, spacing, arrangement (parallel or staggered) or internal construction c. Fin configuration (not spacing) a. Aqueous Ethylene Glycol Solution. If conditions b and c of 3.1 are satisfied, the following are types which may be part of one line: 1. Continuous circuit type 2.
8、 Self-draining type 3. Cleanable type b. Steam Distributing. c. Steam Single-Tube. d. Volatile Refrigerant. Direct expansion coil with flow controlled by the expansion valve. e. Water. If conditions b and c of 3.1 are satisfied, the following are types which may be part of one line: 1. Continuous ci
9、rcuit type 2. Self-draining type 3. Cleanable type 3.2 Cooling Capacity. The capacity associated with the change in air enthalpy which includes both the Latent and Sensible Capacities expressed in Btdh W. 3.2.1 Latent Capacity. Capacity associated with a change in humidity ratio. 3.2.2 Sensible Capa
10、city. Capacity associated with a change in dry-bulb temperature. 3.3 Forced-Circulation Air Coil. A coil for use in an air stream whose circulation is caused by a difference in pressure produced by a fan or blower. 3.3.1 Forced-Circulation Air-Cooling Coil. A heat exchanger, with or without extended
11、 surfaces, through which either cold water, cold aqueous ethylene glycol solution or volatile refrigerant is circulated, for the purpose of total cooling (sensible cooling plus latent cooling) of a forced-circulation air stream. 3.1.1 Examples of coil lines are: 1 Copyright Air-Conditioning and Refr
12、igeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AR1 STANDARD 410-2001 Item Standard air face velocity, std. ft/min std. m/s Entering air dry-bulb temp., OF “CI Table 1. Range of Standard Ratii Volatile Cold
13、Cold Ethylene Refrigerant Water Glycol Solution 200 to 800 200 to 800 200 to 800 i to 41 i to 41 i to 41 65 to 100 65 to 100 65 to 100 18 to 381 18 to 381 18 to 381 Q Conditions Entering air wet-bulb temp., OF “CI Tube-Side fluid velocity, std. ft/s std. m/s 60 to 85 60 to 85 60 to 85 16 to 291 16 t
14、o 291 16 to 291 _ 1.0 to 8.0 21.0 to 6.0 _ ro.3 to 2.41 ro.3 to 1.81 _ _ 30 to 55 -1.1 to 131 6.0 P.31 35 to 65 0.0 to 90 1.7 to 181 -18 to 321 _ _ _ _ _ _ _ _ I Cooling Coils Heating Coils Hot Ethylene 200 to 1,500 -29 to 381 Hot Water 200 to 1,500 i to 81 0.0 to 100 -18 to 381 Steam 200 to 1,500 i
15、 to 81 -20 to 100 -29 to 381 I _ _ 20.5 to 6.0 0.1 to 1.81 0.0 to 200 -18 to 931 _ _ _ _ 0.5 to 8.0 yo.1 to 2.4 Entering fluid temp., OF roc1 120 to 250 49 to 1211 _ _ _ _ Saturated suction refrigerani temp. at coil outlet, OF “CI Minimum suction vapor superheat at coil outlet, OF “CI I Steam pressu
16、re at coil inlet, _ _ _ Psig wa gagel I - I - I - 2.0 to 250.0 14 to 17231 _ _ I I Maximum superheat in _ _ _ steam at coil inlet, OF PCl I - I - I - 50 r28i _ _ I I Concentration by mass, % Minimum fin surface 10 to 60 temperature, OF “CI 0.01 0.01 0.01 Minimum tube wall surface 32 ethylene glycol
17、temperature, OF “CI 0.01 0.01 sol. freeze point 10 to 60 0.01 sol. freeze point 32 0.01 0.01 32 32 0.01 0.01 32 On lower limit, Re shall exceed 3100 at tw,m. Predicted performance and actual performance in the water velocity range below tl tube-side fluid velocity listed above is expected to show va
18、riations in excess of currently accepted tolerances for the followir reasons: 1) 2) 3) Application of coils at low velocity can lead to excessive fouling. Application of coils at low velocity can lead to possible air entrapment. Differences in coil designtype affect the variation in low Re heat tran
19、sfer coefficient. On lower limit, Re shall exceed 700 at tpm. I Note: Numbers in I 1 are in SI Units I 3.3.2 Forced-Circulation Air-Heating Coil. A heat exchanger, with or without extended surfaces, through which either hot water, hot aqueous ethylene glycol solution or steam is circulated for the p
20、urpose of sensible heating of a forced-circulation air stream. rating conditions, by which a coil may be chosen to fit its application. These values apply to all coils of like nominal size and type (identification) produced by the same manufacturer. As used herein, the term Published Ratings include
21、s the ratings of all performance characteristics published in specifications, advertising or other literature controlled by the manufacturer or available through an automated ratinghelection computer procedure. 3.4 Heating Capacity. The capacity associated with the change in dry-bulb temperature exp
22、ressed in Btdh W. 3.5 Laboratory Tests. Tests conducted by a manufacturer on representative coils to determine basic heat transfer and pressure drop characteristics that shall be used in developing Published Ratings. 3.6.1 Application Ratings. Ratings determined at conditions outside the range of st
23、andard rating conditions. 3.6 Published Ratings. A compilation of the assigned values of those performance characteristics, under stated 2 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without licens
24、e from IHS-,-,-AR1 STANDARD 410-2001 3.6.2 Standard Ratings. Ratings within the range 4.1.1.2 Parallel (in-line) tubes with: of standard rating conditions (Table 1) and which are accurate representations of test data. 3.7 “Shall“ or “Should“. Shall or “should“ shall be interpreted as follows: 3.7.1
25、Shall. Where “shall“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.7.2 Should. “Should“ is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.8 Standard Air. Air weighing 0.075
26、lb/ft3 1.2 kg/m3 which approximates dry air at 70F 21“C and at a barometric pressure of 29.92 in Hg 101.3 Wal. 3.9 Standard Coil Orientation. The standard coil position is that of horizontal tubes and vertical coil face with horizontal airflow. 3.10 Test Series. A group of related tests performed on
27、 the same test coil. 3.11 Turbulators. Mechanical devices inside tubes used to increase turbulence of fluids. Section 4. Classifications 4.1 Coil Surface Dimensions, Terminology and Surface Calculations. 4.1.1 Tube Arrangements and Types of Fin Combinations. 4.1.1.1 Staggered tubes with: a. b. C. d.
28、 e. f. Continuous flat plate fins Continuous configurated plate fins Crimped spiral fins Smooth spiral fins Flat plate fiis on individually- finned tube Configurated plate fins on individually-fiied tube a. b. C. d. e. f. Continuous flat plate fins Continuous configurated plate fins Crimped spiral f
29、ins Smooth spiral fins Flat plate fins on individually- finned tube Configurated plate fins on individually-fiied tube 4.1.2 Dimensions, Terminology and Fin Eficiency Calculations. (Note: Equations in are in SI Units) Inthe figures shownin4.1.2.1,4.1.2.2 and4.1.2.3, H applies as shown whether channe
30、l flanges are turned inward or outward. Where an option is offered in the measurement of any dimension, the same basis shall be used to determine rating data as used in the evaluation of test results. Dimensions Lf and Ld for a configurated fin are determined, at the option of the manufacturer, from
31、 the blank fii sheet size prior to forming the configuration providing no edge trimming is performed after forming or from the finished fii size after forming. 3 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking p
32、ermitted without license from IHS-,-,-AR1 STANDARD 410-2001 4.1.2.1 Staggered tubes and parallel (in-line) tubes (as shown below) with continuous flat plate or configurated plate fins. 4.1.2.2 Staggered tubes (as shown below) with smooth or crimped spiral fins or with flat plate or configurated plat
33、e fins on individually-finned tube. Air baffles shown are to be considered optional and H may be the distance between channels as shown in 4.1.2.1. 4 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted wit
34、hout license from IHS-,-,-AR1 STANDARD 410-2001 4.1.2.3 Parallel (in-line) tubes (as shown below) with flat plate or configurated plate fin on individually-fiied tube or with smooth or crimped spiral fins. 5 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with AR
35、INot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AR1 STANDARD 410-2001 4.1.2.4 Fin-Tube Assemblies. Fin efficiency calculations: a. Plate fins with collars touching adjacent fin 0.5 x, = SI for continuous plate fin 0.5 x, = %I for individually-finned tube Do +2Yf 2
36、 xb = From the curve of w various values of Xehb, determine (I (Figure 1 O) b. Plate fins with collars not touching adjacent fin Fin efficiency calculations same as for plate fins with collars touching adjacent fin, except as follows: 6 Copyright Air-Conditioning and Refrigeration Institute Provided
37、 by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AR1 STANDARD 410-2001 Fin efficiency calculations same as for plate fins with collars touching adjacent fin, except as follows: c. Plate fins without collars d. Smooth spiral fins .*.“i y
38、 , 7 Fin efficiency calculations Df x =- “2 W=X,- From the curve of w - “ r w- 2fu r for various values of Xehb, determine (I (Figure 1 i) 6kf Yr kf Yr 7 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted
39、 without license from IHS-,-,-AR1 STANDARD 410-2001 e. Crimped spiral fins Fin efficiency calculations same as for smooth spiral fiis except: Y, =- Yn Dn DO 4.1.3 Equations for Determining Coil Areas and Surface Ratio. (Note: Equations in are in SI Units) 4.1.3.1 Determination of A, and Ap a. Contin
40、uous plate fins for staggered and parallel tube arrangements N,DoL, - NtNf Yf (Do - 2Le) 45.84 A, = b. Smooth spiral fins A, =-(D; NfNt -00 +2DfY,) 91.68 - -(D; -D: +2Df Y,) - ,3658, 1 A, =- (L, - Nf Y,) 45.84 8 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license wit
41、h ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AR1 STANDARD 410-2001 c. Crimped spiral fins A, =- (L, - Nf Y,) 45.84 d. Plate fins on individually-fiied tube =P 3 +2yf 18344 4.1.3.2 Determination of Afi A, Ai, B, A, N, Nb and Le (all cases) HL Af = A, = A, +
42、A, B=A, IA, A, = 0.00545D2Nc = 7.85xW7 D?N, N, =N, IN, 9 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AR1 STANDARD 410-2001 One Row Table 2. Reauired Laboratorv Tests Tw
43、o Rows Three Rows or More In-Line Tubes, All Other Configurations Flat Plate Fins Type of Coil :team (Distributing tube) :team (Single tube) Test Test No Test No Test No Test2 No Test2 No Test2 No Test2 3ot Water 111 Cooling No Test3 No Test4 No Test3 No Test3 Test5 Test Test5 Test four-row, or five
44、- row, or six-row coil lqueous Ethylene Glycol jolution Steam ratings may be calculated using data from one-row tests. Test same coil as used for sensible cooling tests The same steam ratings may be used as determined for steam distributing tube coil of same surface geometry. The overall thermal res
45、istance, R, may be determined by either of the following procedures: (a) RuD is determined from steam coil tests, assuming a steam-side heat transfer coefficient values shall not be extrapolated outside the range covered in the Laboratory Tests except for the following: a. Initial air-to-tube side f
46、luid temperature difference for all coils b. Inlet steam pressure for steam coils c. Fluid velocity for water and aqueous ethylene glycol solution coils d. Fluid temperatures for water and aqueous ethylene glycol solution coils e. Fluid concentrations for aqueous ethylene glycol solution coils 5.3.2
47、 The heat transfer variables for the various coil applications covered by this standard, which shall be evaluated for their effect on thermal performance by conducting Laboratory Tests, are described under 5.4. 5.4 Minimum Requirements for Laborato y Tests. 5.4.1 General Scope. 5.4.1.1 Air Velocity.
48、 All of the following Test Series for specific coil applications, except under 5.4.3.2.2, 5.4.6.3 and 5.4.7 shall be made with at least four different standard air face velocities, covering the complete rating range of air speed in approximately equally spaced velocity increments on a logarithmic scale. 5.4.1.2 Fluid Velocity. For any test with water coils except under 5.4.3.2.2 and 5.4.7, a 11 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license fro
