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- Publisher
- Emerald Publishing
- Copyright
- Copyright © Emerald Group Publishing Limited
- ISSN
- 0002-2667
- DOI
- 10.1108/eb037047
- Publisher site
- See Article on Publisher Site
Abstract
RECENT press comment to the effect that radiant plaque heating in aircraft hangars is "unsuitable since people Radiant Plaque Heating working on top of the wings would bake, whereas those working underneath Ideal Choice for Dan Air the wings would be cold" is not borne out at the new Dan Air main hangar at London Gatwick Airport. In what is Hangar thought to be the first radiant plaque heating installation in a U.K. aircraft hangar, a Schwank system has just the heating problems associated with completed its first full year in operation hangars". Also the type of radiant with flying colours. heaters "best suited for space heating The large maintenance hangar was aircraft hangars were found to be the gas opened officially in April 1989 by HRH fired, high intensity, porous, refractory Princess Alexandra and was specially infra red type", i.e. plaques. The designed to cater for the servicing document further states that radiant requirements of Dan Air's mixed jet heaters offer significant benefits in fleet. The unit measures 70m wide χ energy savings by means of:- "lower air 75m long with a maximum apex height temperatures for same thermal comfort of 25m and has a unique 'anvil finish' as provided by convective heaters; less floor enabling both heat and light to be building heat loss due to lower air reflected. Heating is provided by 40 temperatures; lower energy losses due Thermo Schwank 2108 pressure drop to reduced heat loss and lower fuel radiant plaque units, each rated at requirements; less air stratification; zone 22kW full load and 13.2kW low load, heating flexibility; heat storage charac giving a peak gas loading of 3000ft3/h. level of 12.5°C. Provision was made to teristics due to the hangar floor acting as In order to provide maximum radiant reintroduce a greater number of heaters a heat storage reservoir; and finally, the effect, the heaters are alternatively if it proved necessary. The system is provision of condensation/corrosion angled at 45 and 30 degrees on the side controlled via a main console incor control". walls and mounted in pairs at 30 porating 5 Schwank radiant temperature Commenting on the Schwank radiant degrees and horizontal at high level in controllers plus timers and individual plaque system's first full year of opera the roof structure. Venting of combustion isolating switches for pairs or individual tion, Alec Humphreys, production fumes is carried out on a zoned basis by heaters, as necessary, on a 7 day manager of Dan Air's Engineering means of common flues and high level programmable basis. Division states "I have had no complaints exhaust fans. with the operating temperature of The system was originally designed Tech Note N.1684 12.5°C or indeed of the ability to to provide an internal temperature at The original radiant plaque design for recover temperature after door reclosure. working level, of 16.5°C, with the the Dan Air hangar was conceived with A test was, in fact, carried out under not facility for complete recovery to this the recommendation of Tech. Note particularly ideal conditions when the figure within 1 hour after closure of the N.1684 entitled "Design Guidelines for hangar was still in a 'drying out' mode main hangar doors. The doors are Heating Aircraft Hangars with Radiant and empty and recovery was perfectly generally reckoned to open and close 4 Heating", drawn up by the Naval Civil satisfactory. Our first really representa times during a working day. A number Engineering Laboratory, California, very tive gas bill has just arrived, is considered of heaters were withdrawn from the much in mind. This document*, drawn to be reasonable and reflects the original design concept at installation up in 1983 and widely adopted through system's energy efficient characteristics. stage however, with the result that the out the USA and Canada states "a The system has proven to be clean, easy internal operating and recoverable properly designed and installed radiant to maintain and free from the annoyance temperature achieved is at the lower heating system can eliminate many of of airborne dust etc. No problems whatsoever have occured with hot or cold spots due in part to the location and passenger stairs, three Towbars for angling of the plaques and in part to the ADE Wins Aircraft Ground Support A300 and A320 aircraft, a truck heat and light reflective floor which Contracts from DNATA mounted Toilet Servicing Unit and two enables heat to be reflected under cargo Transfer Transporters. aircraft wings and fuselage sections. In ADE is a long established supplier to short, my staff are happy and therefore, Auto Diesels Edghill Ltd has been DNATA. Manufacturing of their new I am happy. The only improvement I awarded two large contracts by DNATA, contracts is well under way at ADE's can really envisage is an automatic heat the foremost aircraft handling company Hayes site in Middlesex and several cut off facility for when the doors open. operating at Dubai International Airport. units have already been shipped to This is an inexpensive and simple The contracts are for two Ground Dubai. modification and is currently under Power Units, one truck mounted model consideration". 550/100/TRK/S and one self-propelled Auto Diesels Edghill Limited,1 12- model SP550/100/S from ADE's new Rigby Lane, Hayes, Middlesex, 500 series ground power units with England. UB3 1EY. Tel: 081-569 Schwank Ltd, 62 Sunningdale Road, water-cooled engines, six truck mounted- Sutton, Surrey. Tel: 081-641 3900. AIRCRAFT ENGINEERING — January 1991
Journal
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Jan 1, 1991