BS ISO 21441:2019 pdf download – Road vehicles — Engine EGR cooler — Heat dissipation test methods

BS ISO 21441:2019 pdf download – Road vehicles — Engine EGR cooler — Heat dissipation test methods This document defines the methodology for the measurement of heat dissipation and pressure loss of liquid cooled engine EGR coolers in internal combustion engines for road vehicles. The principles of this document are valid for clean and fouled EGR coolers. 2 Normative references There are no normative references in this document. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/ 3.1 EGR technology that recirculates a portion of an engine’s exhaust gas back into the intake to control the concentration of oxygen taken into the engine 3.2 EGR gas gas that has been extracted from the exhaust gas and is passed through the EGR cooler (3.5) core (3.14) 3.3 test gas pressurized air or exhaust gas made by burners used in place of real EGR gas (3.2) during the heat dissipation performance test and when measuring EGR gas pressure loss (3.10) 3.4 cooling liquid water or coolant mixture during the heat dissipation performance test and when measuring cooling liquid pressure loss (3.11) 3.5 EGR cooler liquid cooled heat exchanger for cooling the EGR gas (3.2) 3.6 EGR gas heat dissipation amount amount of heat lost by the test gas (3.3) during the heat dissipation performance test Note 1 to entry: The EGR gas heat dissipation amount is expressed in kilowatts (kW). b) EGR gas pressure loss; c) cooling liquid pressure loss. 5 Test setup 5.1 Test conditions The EGR cooler, test gas, cooling liquid, and test location conditions are shown as follows. In the case of measurement with the fouled EGR cooler, test conditions should be agreed by the parties concerned. a) EGR cooler: The EGR cooler consists of main components such as the core, tank, flanges, and pipes, as well as supplementary parts. An example is shown in Figure 1. b) Test gas: Tests shall be run with a test gas inlet temperature, an inlet pressure and a mass flow rate that are defined upon the agreement by the parties concerned. c) Cooling liquid: Water used in the cooling liquid should be demineralized or treated. In the case of using a coolant mixture as the cooling liquid,...