TY  - JOUR
T1  - Yatay deşarj edilen soğuk-yoğun atıksuların bazı deşarj parametrelerinin belirlenmesi
TT  - Determination of some discharge parameters of horizontally discharged cold-dense wastewaters
AU  - Sezgin, Naim
PY  - 2018
DA  - June
JF  - Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi
PB  - Pamukkale Üniversitesi
WT  - DergiPark
SN  - 2147-5881
SP  - 494
EP  - 499
VL  - 24
IS  - 3
LA  - tr
AB  - Termalkirlilik, okyanus, göl veya nehir gibi sucul alanlarda ortam sıcaklığının insanfaaliyetleri sonucunda artması veya azalması olarak tanımlanır. Termalkirliliğe, enerji santralleri, sıvılaştırılmış doğalgaz terminalleri (LNG) veendüstriyel tesislerin ısıtma veya soğutma amaçlı kullanılan daha sonra alıcıortamlara deşarj edilen suları neden olur. Alıcı ortamlara deşarj edilen termalatıksuların en önemli kaynaklarından biri LNG gazlaştırma terminallerindenkaynaklanan soğuk sulardır. Soğuk sular genellikle kıyısal sulara deşarjedilirler. Bu sular deşarj edildikleri alıcı ortamlara göre yoğunluklarınınyüksek olması nedeniyle bir çeşit negatif yüzen (batan) jetlerdir. Alıcı ortamcanlı türlerine olumsuz etkilerinden dolayı soğuk sular, yüksek seviyedeseyrelme sağlayacak şekilde deşarj edilmelidir. Bu çalışmada, yatay olarakdeşarj edilen soğuk-yoğun suyun birinci seyrelme ve çarpma noktası gibi bazıdeşarj parametreleri laboratuvar ortamında dairesel deşarj portu kullanılarakbelirlenmiştir. Soğuk-yoğun atıksuyun alıcı ortam içerisindeki davranışını (jetgeometrisini) belirlemek için renk maddesi olarak Rhodamin B ilavesiyapılmıştır.  Renklendirilmiş soğuk-yoğunatıksuyun anlık fotoğraflarını çekmek için yüksek çözünürlüklü kamera ve atıksujet merkezinde meydana gelen sıcaklık değişimlerini (seyrelmeler) ölçmek içinde hassas termal problar kullanılmıştır. Farklı atıksu yoğunlukları elde etmekiçin -3 °C, -5 °C ve -7 °C gibi üç değişik sıcaklık fark değerleriuygulanmıştır. Bu çalışmada elde edilen sonuçlara göre soğuk su deşarjlarınıntabana çökme eğilimde olan negatif yüzen (batan) jet gibi davrandığıbelirlenmiştir. Ayrıca bu çalışmada, ortalama normalize edilmiş çarpma noktasımesafesi ve birinci seyrelmenin 2.333 ve 0.491 olduğu bulunmuştur.
KW  - Termal kirlilik
KW  - Yoğun jet
KW  - Soğuk su deşarjı
KW  - Birinci seyrelme
KW  - Negatif yüzen jet
N2  - Thermalpollution is defined as increase or decrease in temperature of an aquaticenvironment which may be ocean, lake or river by human influence. A commoncause of thermal pollution is the use of water as a cooling and heating systemby power plants, liquefied natural gas (LNG) re-gasification terminals andindustrial manufacturers. One of the important sources of thermal effluents iscold water discharges, which are mainly originated from LNG re-gasificationterminals from open cycle heating units. Cold water can be frequentlydischarged into coastal waters. Due to its high density, cold water dischargeis a kind of negatively buoyant jet. Because of some undesired effects of coldwater on receiving water species, should be discharged properly into the marineenvironment with a high level of initial dilution. Some discharge parameters ofhorizontally discharged cold-dense wastewater such as initial dilutions,impingement points were   determined in alaboratory system using circular port in this study. To determine the behaviorof the cold-dense wastewater (wastewater jet geometry) Rhodamine B as acolorant was added to the wastewater. A high-resolution camera was used to takesnapshots of the colored cold-dense wastewater. Temperature changes (dilutions)in the cold-dense wastewater jet centerline were detected with sensitivethermal probes. To gain different densities, three discharge temperaturedifferences were used as -3 °C, -5 °C and -7 °C. According to the results ofthis study, it was determined that the cold water discharges behaved like anegative buoyant jet. In addition, it was calculated that the averages of thenormalized impingement point and initial dilution of the cold water were found2.333 and 0.491, respectively.
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UR  - https://dergipark.org.tr/tr/pub/pajes/issue//437337
L1  - https://dergipark.org.tr/tr/download/article-file/495074
ER  -