Boeing 737-400 passenger air conditioner control system model for accurate fault simulation

Simple item page
dc.contributor.authorChowdhury, Shafayat H.
dc.contributor.authorAli, Fakhre
dc.contributor.authorJennions, Ian K.
dc.date.accessioned2022-03-25T09:41:46Z
dc.date.available2022-03-25T09:41:46Z
dc.date.issued2022-03-08
dc.description.abstractThe aircraft environmental control system (ECS) is a highly integrated and complex system. The passenger air conditioner (PACK) is the heart of the ECS and has been reported as a key driver of unscheduled maintenance by aircraft operators. This is principally due to the PACK’s ability to compensate for degraded components, and hence mask their real condition, so that when failure occurs it is a major event. The development of an accurate diagnostic solution would identify the degradation early and hence focus effective maintenance and reduce cost. This paper is a continuation of the authors’ work on the development of a systematically derived PACK simulation for accurate fault diagnostics, utilizing a model-based approach. In practice, the PACK simulation accuracy is dependent on a number of factors, which include the understanding of its control system. The paper addresses this by taking an in-depth look at the factors controlling the operation of the PACK to enable the gap between the theoretical understanding of the PACK and the engineering design of the system to be bridged, and accurate simulations under healthy and degraded scenarios obtained. This paper provides a comprehensive explanation of the PACK control system elements (principally valves) and verifies their operation based on experimental test data acquired from a B737-400 aircraft. A discussion of the control used in the simulation is then given, resulting in the correct temperature, pressure, and flow being delivered to the cabin. The overall simulation results are then presented to demonstrate the importance of using a systematically derived control logic. They are then further used to assess the impact of degradation in the main PACK valves (PVs).en_UK
dc.identifier.citationChowdhury S, Fakhre A, Jennions IK. (2022) Boeing 737-400 passenger air conditioner control system model for accurate fault simulation. Journal of Thermal Science and Engineering Applications, Volume 14, Issue 9, September 2022, Paper number TSEA-21-1530en_UK
dc.identifier.issn1948-5085
dc.identifier.urihttps://doi.org/10.1115/1.4053740
dc.identifier.urihttps://asmedigitalcollection.asme.org/thermalscienceapplication/article/14/9/091008/1134927/Boeing-737-400-Passenger-Air-Conditioner-Control
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17682
dc.language.isoenen_UK
dc.publisherAmerican Society of Mechanical Engineersen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectaerospace heat transferen_UK
dc.subjectenergy systemsen_UK
dc.subjectexperimental techniquesen_UK
dc.subjectfoulingen_UK
dc.subjectheat exchangersen_UK
dc.subjectthermal systemsen_UK
dc.titleBoeing 737-400 passenger air conditioner control system model for accurate fault simulationen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Boeing_737-400_passenger_air_conditioner_control_system-2022.pdf
Size:
3.21 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)