1、 _ MIL-PRF-3200L R %c1i%99Ob 2053602 939 1 INCH-POUND 1 MIL-PW-32001 - PERFORMANCE SPECIFICATION FAN, CIRCULATING - HEAT DISTRIBUTION, SELF-POWERED This specification is approved for use by all Departments and Agencies of the Dep Defense. rtment 1. SCOPE 1.1 Scape. This specification covers the perf
2、ormance and acceptance requirements for a self-powered fan unit and transport case for use with radiant type, non-electrical powered tent heaters, to distribute heated air in military tents (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections
3、 3 and 4 of this specification. This section does not include documents cited in other sections of this f specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet
4、 all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Goveniment. 2.2.1 S3mckds. The following standard forms a part of this document to the extent specified herein. Unless otherwise specified, the issue is that listed in the issue
5、 of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, US. Arm
6、y Natick Research, Development and Engineering Center, Natick, MA 01760-5018 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426). AMSC NIA - FSC 4140 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32001 7
7、399909 2953602 i375 M MIL-PRF-3200 1 STANDARDS DEPARTMENT OF DEFENSE MIL-STD-8 10 Environmental Test Methods and Eng,deering Guide ? ries (Uniess otherwise indicated, copies of the above standards are available from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelph
8、ia, PA 19 1 1 1-5094) 2.3 Chier of pm. In the event of a confict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
9、 3. REQUIREMENTS 3.1 Ehade . When specified (see 6.2), a sample shall be subjected to a first article inspection in accordance with 4.1.1. 3.2 Conformance. Items Mshed under this specification shall be subjected to conformance inspection in accordance with 4.1.2. 3.3 ODeratinp. 3.3.1 . The fan unit
10、shall not require, nor contain, any user interface device to regulate the operation of the unit. 3.3.2 Intenial power system. The fan Unit shall contain an internal power supply system that operates silently, contains no moving parts, and requires no adjustments for operation. The intemal power syst
11、em shall provide all necessary power to operate the fan unit fiom conversion of heat energy from the heater surface. No external power source shall be required. The power system shall require no recharging, refueling, or replacement. 3.3.3 Air. The self-powered fan unit shall produce a downward air
12、flow within five minutes of being placed on the surface of an operating tent heater. The fan unit shall produce air flows at the rates specified in Table I when tested as specified. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32001 9979
13、906 2853603 701 Test Base Temperature (OF) 300 400 MIL-PRF-32001 Fan Unit Air Flow (cfm) 150 250 TABLE I. -es vs. base txmpmbm I 500 I 350 I I 600 I 400 I 3.3.4 Frame/enclosure. The Came and handle of the fan unit shall remain sufficiently cool to allow safe handling and removal Com an operating hea
14、ter Without the need for gloves. 3.3.5 . All components of the fan unit shall be designed and constructed to operate on the surface of a standard Army tent heater, which is operating at full firing rate, without damage to the fan unit components. 3.3.6 ILchtdQ. The fan unit shall be capable of demon
15、strating a Mean Time Between Essential Function Failure (MTBEFF) of at least 560 operational hours with 80% confidence. If a motor is used to operate the fan, it shall have a minimum average life rating of 4,000 hours. 3.3.7 The fan unit shall perform in all conditions of operation in a safe manner.
16、 3.3.7.1 53mpdgsedees, There shall be no sharp edges that may cause injury to users. 3.3.7.2 Movino puts . All moving parts shall be properly enclosed to prevent injury to operators. Guards shall cover the fan area to prevent injury by accidental insertion of fingers or foreign objects larger than 0
17、.75 inches in diameter. 3.3.7.3 tMktghM. A safety label stating “CAUTION: ROTATING FAN” shall be placed in an easily readable location on the fan unit. 3.4. Support or ownershii, requirements. 3.4.1 Wei. The total weight of the fan unit shall not exceed 15 pounds. The total weight of the transport c
18、ase shall not exceed 10 pounds. 3.4.2 Handles. The fan unit and case shall be equipped With a carrying handle which is rounded for bare-handed use and is large enough to accommodate operators wearing standard military cold weather gloves (NSN 8415-01-310-7338). 3 Provided by IHSNot for ResaleNo repr
19、oduction or networking permitted without license from IHS-,-,-c MIL-PRF-32001 3.4.3 a . The fan unit, when confgured inside the transport storage case, shall be capable of being transported as loose cargo, carried on ground vehicles as unrestrained cargo, and survive an accidental drop without damag
20、e to the unit. 3.4.3.1 vibration. The fan unit shall survive vibrations encountered during basic transportation. 3.4.3.2 shock. The fan unit shall survive accidental drops and banging encountered during basic transportation. 3.4.4 Maintenance . The only operator maintenance required shall be Prevent
21、ive Maintenance Checks and Services (PMCS). 3.4.5 * . The fan unit shall have a nameplate marked with the National Stock Number, the contract number, and the manufacturers name and part number. 3.5.1 SalLfig. The fan unit and transport case shall operate properly after exposure to a sait fog environ
22、ment. 3.5.2 Wind/rain . The fan unit shall operate properly afer being subjected to wind/rain while configured inside the transport storage case. The transport case shall be weather tight. 3.5.3 Storage. The fan unit shall be capable of withstanding storage temperatures of 160F and -60F without degr
23、adation of perfonnance. The fan unit shall be capable of being placed on an operating heater directly from cold storage without damage or degradation of performance. 3.5.4 . The fan unit shall be capable of operating in surrounding ambient temperatures of at least 100 OF. 3.6 Interfaceande-. 3.6.1 D
24、imensions . The dimensions of the fan unit shall be no greater than shown in figure 1 to ensure proper interface with Army tent heaters. The outside dimensions of the storage case shall not exceed 1.85 CU. R. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
25、 IHS-,-,- MIL-PRF-32001 m 9999906 2053605 584 m 8 MIL-PRF-32001 i 14.25” (mox) r- I I r-i 3 I Airflow Il 1 4 direction IO” (mm) I I FAN BASE 5.00” (mox) 4.75” (min) Figure 1. Fan dimensions 4. VEFWICATION 4.1 * . The inspection requirements specified herein are classified as follows: a. First articl
26、e inspection (see 4.1.1). b. Conformance inspection (see 4.1.2). 4.1.1 * . When a first article inspection is required (see 3.1 and 6.2), the fan unit shall undergo the tests and examinations outlined in Table II. Sampling for the first article inspection shall be as specified in the contract or pur
27、chase order. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32001 I 9199906 205360b 410 I Requirement Paragraph 3.3.5 3.3.6 MIL-PRF-3200 1 Verification Characteristic Requirement Verification Paragraph Paragraph Paragraph 4.3.5 Identificat
28、ion and 3.4.5 4.4.5 marking 4.3.6 Environmental 3.5 4.5 requirements I Characteristic 3.3.7 4.3.7 Temperature resistance Reiiabiiity Sait fog 3.5.1 4.5.1 Sharp edges Moving parts t Safety label 3.3.7.1 3.3.7.2 3.3.7.3 Support or owner-s hip 4.3.7.1 WiXldX-aiXl 3.5.2 4.5.2 4.3.7.2 Storage 3.5.3 4.5.3
29、 4.3.7.3 Operating 3.5.4 4.5.4 temperature range 3.4 3.4.1 4.4 Interface & inter- 3.6 4.6 operabiiiw requirements 4.4.1 Dimensions 3.6.1 4.6.1 4.1.2 . Conformance inspections shall include tests 4.3.1,4.3.2, 4.3.7.1,4.3.7.2,4.3.7.3,4.4.1,4.4.2,4.4.5, and 4.6.1. Sampling for conformance inspections s
30、hall be as specified in the contract or purchase order. 4.2 . Verification methods can include visual examination, measurement, testing, simulation, modeling, engineering evaluation, component properties analysis, certification and similarity to previously approved or previously qualified designs. 4
31、.2.1 * . The contractor may propose alternative test methods, techniques, or equipment, including the application of statistical process control, tool control, or cost effective sampling procedures to verify performance (see 6.4). 4.3 verification. 4.3.1 a . . Verify there are no user controls or in
32、dicators for the unit. 4.3.2 Internal power sv * . Inspect and verify that the internai power system does not contain moving parts. Operate unit to verify that the power system does not require adjustments for proper performance or produce noise during operation. Verify that the internal power syste
33、m does not require recharging, refueling or replacement. Verify during operation that there is no external power source used to operate the fan unit. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3200 1 4.3.3 Airw test . For the purpose o
34、f testing, the “standard test setup“ shall refer to a fan unit installed in the setup shown in Figure 2. Unless otherwise specified, all air flow tests shall be conducted in surrounding ambient temperatures of 68 O F (+/- 3 O F). The setup shall consist of an electric hot plate, a test base, the fan
35、 unit, and a top shroud, along with a thermocouple and air velocity transducer. The hot plate shall be a McMaster-Can: Model 31 18K88 (see 6.8) or equivalent commercially available, 1500 Watt electric heater. The heating element of the hot plate shall be 8 inches in diameter. The overall size of the
36、 hot plate unit shall be a minimum of 15 inches square by 4 to 8 inches high. The test base shall be an 8 inch diameter by 0.5 inch thick aluminum disk as shown in Figure 3. It shall contain a 0.125 inch diameter hole drilled Com the outer diameter to the center of the disk, with the drill hole cent
37、ered between, and parallel to, the faces of the disk. A thermocouple and heat sink compound shall be inserted into the hole. The thermocouple shall be connected to a thermocouple reader. The test base shall be placed over the electric hot plate heating element. The fan unit shall be placed in the ap
38、proximate center of the test base. The top shroud shall be 14 inches tall and have an inner diameter equal to the outer diameter of the fan unit. The shroud shall have two, 0.25 inch diameter holes, 90 degrees apart and 7 inches down Com the top of the unit. The air velocity transducer shall be an O
39、mega model FMA-900 or equivalent (see 6.8) containing a 0.25 inch diameter probe with sufficient length to insert into the center of the shroud. I TOP SHROUD AIR VELOCITY TRANSDUCER a c= l i I FAN UNIT I . I I HEATING ELEMENT TEST BASE ELECTRIC HOT PLATE I I I I FIGURE 2. Standard test setup 7 Provi
40、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32QOL U 999990b 2053608 293 = I MIL-PRF-32001 I 0.5” 00.1 25” HOLE / (4.0” DEEP) - c FIGURE 3. Aluminm test base With the fan unit in the standard test setup as described, adjust the electric hot pla
41、te to a setting that produces a test base temperature which is within 5OF but not greater than the lowest temperature in Table I. Once the base temperature has stabilized at the desired setting, allow the fan unit operation to stabilize for 10 minutes. Verify air flow is produced in a downward direc
42、tion within 5 minutes of reaching the test base temperature. Measure the air velocity and calculate the total air flow produced by the fan unit as follows. The shroud inner area shall be divided into 5 equal areas as shown in Figure 4. The air velocity transducer probe shall be inserted through the
43、holes in the side of the shroud to the middle of each area and a measurement shall be recorded. Since each velocity measured is for an equal area, the measurements shall be averaged and multiplied by the total area to obtain the air flow rate. Insert the probe tip to a depth equivalent to that liste
44、d in Table III for point one. Note that this depth is based on the fan Unit outer radius or half the diameter /2). Record the air velocity at the frst point. Repeat for each of the five points listed in Table III. Remove the probe from the shroud and insert it into the hole which is 90 degrees from
45、the first hole. Repeat the five measurements of air velocity at the locations listed in Table III. Add all ten measurements and divide by 10 to obtain the average air velocity in feet per minute. Multiply this number by the area of the fan shroud to obtain the air flow rate in cubic feet per minute
46、(ch). Note that the diameter in Table III is in inches while the diameter in the area equation is in feet. produced by the fan unit shall be equal or above the minimum values listed in Table I for the corresponding base temperatures. Repeat the entire procedure for each of the base temperatures list
47、ed in Table I. Air flow rates 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32001 W 999990b 2053609 L2T W Point 1 2 3 MIL-PRF-32001 Depth (inches) .053*D/2 . 1 66*D/2 .297*D/2 I FIGURE 4. Air velocity measurement points 4 .461 *DI2 I I I
48、5 I 1.00*Dl2 I 4.3.4 . , Place the fan unit in the standard test setup with the top shroud removed. Turn the electric heater on to obtain a base temperature of 580 to 600F. Allow the fan to operate for 30 minutes. The handle shall remain cool enough for removal with a bare hand without causing bums
49、or discomfort. 4.3.5 & . Place a fan unit in an oven set at 300F. Maintain the oven at 300F f 10F for 60 minutes. Remove the fan unit and allow it to cool to room temperature. Perform a functional test per 4.3.3 at 600F test base temperature only. The fan shall meet the air flow requirement of Table I after temperature resistance testing. 9 Provided by IHSNot for ResaleNo reproductio
