Transient effects of different heating modes on temperature and humidity inside the automobile cabin during heating period

Bu çalışmanın amacı ısıtıcının bir otomobil kabini içerisindeki sıcaklık ve bağıl neme olan anlık etkilerininincelenmesidir. Otomobil kabini diğer iç ortamlara göre daha küçük olduğundan sıcaklık ve bağıl nem değerlerigeçici rejim koşullarında çok hızlı bir biçimde değişmektedir. Isıtıcının otomobil kabini içerisindeki etkilerini gerçekkabin ortam koşullarında inceleyen çalışmalar oldukça sınırlıdır. Deneyler olası rüzgar ve güneş ışınımı etkileriniönlemek için laboratuarda park edilmiş bir otomobil içerisinde gerçekleştirilmiştir. Deneylerde üç ayrı hava hızdüzeyi olan konsol menfezleri çalıştırılmıştır. Sıcaklık ve bağıl nem değerlerini hava hız düzeylerine göre farklılıklarıve zamana göre sıcaklık, bağıl nem değerleri arasındaki bağıntılar elde edilmiştir. Bu çalışmadan anlaşıldığı üzerearaba kabini içerisindeki sıcaklık ve bağıl nem değerleri hava hızı değerlerinden doğrudan etkilenmektedir. Buçalışmadan elde edilen sonuçların, otomobillerdeki ısıl konfor çalışmalarının geliştirilmesinde ve geçici rejimkoşullarında gerçekleştirilen sayısal hesaplamalı akışkanlar dinamiği analizlerinin doğrulanmasında kullanılabilir.

Isıtma sürecinde farklı ısıtma modlarının otomobil kabini içerisindeki sıcaklık ve bağıl neme olan anlık etkileri

The aim of this study is to investigate the transient effects of heater on temperature and humidity in anautomobile cabin under transient heating period. Interior volume of an automobile is relatively small to other indoorenvironments, so that temperature and humidity values can rapidly change under highly transient conditions. Studiesthat are investigating the effects of heater on automobile cabin environment in real car conditions are restricted.Experiments were carried out in a parked car inside a laboratory at nights to prevent the possible wind and solarirradiation effects. In the experiments only plane vents were operated with three different air velocity levels.Temperature and relative humidity differences between air velocity levels were obtained, relations between time,temperature and relative humidity were calculated. From this study it is understood that temperature and relativehumidity values inside a car vary directly from air velocity values. The obtained results can be used to improve otherthermal comfort studies inside automobiles and also CFD analyses can be validated under transient conditions.

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