SAE J 2646-2011 Cab Air-Conditioning Test Procedure Heavy Trucks with and without Sleepers《没有卧车的重型卡车的驾驶室空调的测试程序》.pdf
《SAE J 2646-2011 Cab Air-Conditioning Test Procedure Heavy Trucks with and without Sleepers《没有卧车的重型卡车的驾驶室空调的测试程序》.pdf》由会员分享,可在线阅读,更多相关《SAE J 2646-2011 Cab Air-Conditioning Test Procedure Heavy Trucks with and without Sleepers《没有卧车的重型卡车的驾驶室空调的测试程序》.pdf(9页珍藏版)》请在麦多课文档分享上搜索。
1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2646_201105SURFACEVEHICLERECOMMENDEDPRACTICEJ2646 MAY2011 Issued 2011-05 Cab Air-Conditioning
5、Test ProcedureHeavy Trucks with and without Sleepers RATIONALENot Applicable. 1. SCOPE This SAE recommended practice establishes a uniform test procedures for on highway trucks equipped with an air-conditioning system used to condition the air in the cabin and sleeper compartment of the vehicle. Thi
6、s specification will apply to heavy trucks with and without sleeper compartments. 1.1 Purpose The purpose is to provide a standard test procedure for comparison and evaluation of heavy truck air-conditioning performance.2. REFERENCES 2.1 Related Publications The following publications are provided f
7、or information purposes and are not a required part of this document. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. (Body)SAE J1163 Determining Seat Ind
8、ex Point SAE J1559 Measurement of Solar Heating Effect 3. DEFINITIONS 3.1 Air Conditioning System Any system that lowers the cabin and/or sleeper air temperature by the means of a refrigerant. 3.2 Compressor Pumps low pressure refrigerant vapor out of the evaporator by suction, raises the pressure,
9、then pumps it under high pressure into the condenser. SAE J2646 Issued MAY2011 Page 2 of 93.3 Condenser Removes heat from the entering high pressure, high temperature de-superheated vapor refrigerant, changing it to a high pressure, high temperature subcooled liquid refrigerant. 3.4 Expansion Device
10、 Valve, orifice tube, or other expansion device in the refrigerant circuit for the purpose of metering liquid from the condenser into the evaporator inducing a large pressure drop changing the refrigerant to a low temperature, low pressure liquid.3.5 Evaporator Removes unwanted heat from the air by
11、the boiling of liquid refrigerant in the evaporator coil. 3.6 Cab Average Temperature The average of the head, lap and floor temperatures (see Figure 1) measured in both the driver and passenger locations 3.7 Cab Sleeper Average Temperature The average of all measured temperatures inside the sleeper
12、 (see Figure 2) responsible for ensuring even temperature distribution within the sleeper area. 3.8 Ambient Temperature Air temperature measured external to the vehicle and internal to the Vehicle Environmental Chamber. 3.9 Refrigerant Chemical used in a refrigeration system for the purpose of heat
13、transfer. 4. TEST EQUIPMENT 4.1 Vehicle Environmental Chamber (VEC) Environmental chamber large enough to contain the vehicle and test equipment. The chamber must have provisions to maintain ambient temperature, relative humidity, and solar intensity. Chamber capability should maintain the following
14、 levels of accuracy: Temperature: 2 C ( 4 F) Relative Humidity: 3% Solar Load: 50 W/m24.2 Engine Speed Engine tachometer with an accuracy of 2% of observed values. 4.3 Pyranometer A device used to measure radiant energy from the solar load placed horizontal above the vehicle roof surface. 4.4 Temper
15、ature Measurement Devices Devices used to measure temperature inside the VEC as well as inside and outside the vehicle to be used for calculating and comparison of cooling performance, i.e., thermocouples, RTDs, etc. Must have an accuracy of 1.5 C ( 2.7 F). SAE J2646 Issued MAY2011 Page 3 of 94.5 Ai
16、r Velocity/Wind Speed Anemometer to measure air velocity (with a measuring accuracy of 2% of observed values).4.6 Data Acquisition System System that will monitor and record all required test parameters and necessary measured conditions consistent with this specification at the required time interva
17、l. 4.7 Pressure Transducer Device used to measure refrigerant pressure within the refrigeration system that are required within this specification for the purpose of calculating cooling performance. 4.8 Mass Flow Meter Device used to measure the mass flow of refrigerant in the refrigeration system.
18、4.9 Refrigerant Charging and Recovery Station Equipment used to charge the refrigeration system and recover the refrigerant from the refrigeration system. 4.10 Voltage/Current Shunt Device used to measure voltage or current from the HVAC system electrical components. 5. AIR-CONDITIONING TEST VEHICLE
19、 PREPARATION 5.1 Instrumentation/Test Setup 5.1.1 Panel Louver Direction Aim panel louvers towards the occupant, toward the shoulder level of the seats. Aim all other louvers straight ahead. NOTE: All HVAC louvers are open and directed perpendicular to their mounting surface, however none of the lou
20、vers should be directed at any of the thermal probes unless location of the louver is located directly at a probe when adjusted perpendicular to their mounting surface.5.1.2 Vehicle Exterior Ambient Temperature The vehicle test chamber temperature should be measured by 4 exterior thermocouples. Two
21、thermocouples are to be placed along the centerline of the vehicle, way between the ground and the highest point of the vehicle (excluding bolt on items), 915 mm (3 ft) forward of the front of the vehicle and 915 mm (3 ft) away from the back of the vehicle. Left and right side vehicle ambient should
22、 be measured at a point 150 mm (6 inches) away from left side and right side of the vehicle. If a vehicle does not have mirrors, take measurement 450 mm (18 inches) outward from left and right side window.5.1.3 Fresh Air Inlet Temperature A minimum of one temperature measurement device should be ins
23、talled in the fresh air inlet. 5.1.4 Recirc Air Inlet Temperature A minimum of one temperature measurement device should be installed in the recirc air inlet. SAE J2646 Issued MAY2011 Page 4 of 95.1.5 Air Outlet Louver Temperature A minimum of one temperature measurement device should be installed i
24、n the center of all louvers. Install temperature measurement device 19 mm (0.75 inches) into the louver and secured not to block airflow exiting the louver. For larger louvers multiple temperature measurement devices may be used and averaged. 5.1.6 Air Temperature Probe Locations Thermocouples for m
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