Changes in thermal properties during the growing season topredict the apple harvest time and monitor the quality
Başlık çevirisi mevcut değil.
- Tez No: 913631
- Danışmanlar: DR. VİRENDRA M. PURİ
- Tez Türü: Yüksek Lisans
- Konular: Belirtilmemiş.
- Anahtar Kelimeler: thermal conductivity, DNHP, Malus x domestica (Borkh.), fruit maturity, harvest time
- Yıl: 2018
- Dil: İngilizce
- Üniversite: The Pennsylvania State University
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 91
Özet
Apple is one of the most widely cultivated fruit worldwide and processed into many products. The maturity of apple fruit at harvest is a factor that significantly impacts quality and storage. An early or late picked apple is more sensitive to physiological disorders and has shorter storage life than fruit harvested at the proper maturity time. To determine the harvest time, many physical, biochemical, and physiological properties have been assessed by destructive and nondestructive methods. However, no study on the measurement of thermal properties, which are a set of physical properties to predict the apple harvest time has been reported in the literature. Therefore, the objective of this study was to measure thermal properties, i.e., thermal conductivity, thermal diffusivity, and specific heat, of 'Gala' apple cultivar from the Fruit Research and Extension Center, Biglerville, PA during the 2017 growing season using the dual needle heated probe (DNHP), which is simple, rapid, and portable method. The measured weekly average of thermal conductivity, thermal diffusivity, and specific heat values of apple samples during the growing season in the laboratory (18-23°C) were between 0.441 ± 0.015 and 0.445 ± 0.014 W/m-K, 0.137 ± 0.004 and 0.152 ± 0.006 mm2 /s, and 3.93 ± 0.20 and 4.23 ± 0.25 kJ/kg-K, respectively, with mean temperature of apple from 19.1 to 22.6°C. Average thermal conductivity and thermal diffusivity values of apple decreased significantly as apple ripened (p < 0.05) while specific heat values did not change significantly (p > 0.05) during the growing season. Overall, the most noticeable changes in thermal conductivity occurred during the last two weeks of the growing season, which corresponds to the time when major biochemical changes are known to occur. Subsequently, the apple's thermal property changes during the growing season were examined for their prospective relationships with physical properties (size, density, and moisture content) and harvest fruit quality and maturity indices (firmness, soluble solid content, starch index, and Streif Index). Based on the Pearson correlation coefficient (r) among thermal properties and the physical properties and the harvest fruit quality and maturity indices, thermal conductivity had moderate correlation with thermal diffusivity (0.44), moisture content (0.45), firmness (0.44), iv soluble solid content (-0.62), starch index (-0.53), flesh stain % (0.44), and Streif Index (0.46) during the growing season. Hence, thermal conductivity can detect the quality changes during the growing season and determine the harvest time of apple but not as the sole predictor.
Özet (Çeviri)
Özet çevirisi mevcut değil.
Benzer Tezler
- Numerical modeling of heat transport for ground-coupled heat pump (GCHP) systems and associated life cycle assessments
Başlık çevirisi yok
AYŞE ÖZDOĞAN DÖLÇEK
Doktora
İngilizce
2016
Jeoloji MühendisliğiUniversity of Wisconsin-MadisonPROF. JAMES TINJUM
PROF. CHRISTOPHER CHOI
- Dynamic simulation of calibrated energy model by controlling indoor temperature to maximize the energy efficiency
Dinamik simülasyon yöntemiyle iç mekan sıcaklıklarına göre enerji modelinin enerji verimliliğini mksimize etmek için kalibre edilmesi
BURAK FİL
Yüksek Lisans
İngilizce
2023
Enerjiİstanbul Teknik ÜniversitesiEnerji Bilim ve Teknoloji Ana Bilim Dalı
PROF. DR. HATİCE SÖZER
- Kentsel ve kırsal alanlarda şehirleşmenin etkisinin, iklim modeli COSMO-CLM ve TERRA-URB kullanılarak incelenmesi
Investigation urbanization effects of urban and rural areas over Istanbul with COSMO-CLM and TERRA-URB climate models
HURİYE PERİM TEMİZÖZ
Yüksek Lisans
Türkçe
2019
Meteorolojiİstanbul Teknik ÜniversitesiMeteoroloji Mühendisliği Ana Bilim Dalı
PROF. DR. YURDANUR ÜNAL
- Lignoselülozik biyokütlenin inorganik bileşenlerinin uzaklaştırılmasının kül özellikleri üzerine etkisinin incelenmesi
Investigation of the effect on ash properties of removal of inorganic components from lignocellulosic biomass
ÖVÜL HALİL ÇÖP
Yüksek Lisans
Türkçe
2018
Enerjiİstanbul Teknik ÜniversitesiKimya Mühendisliği Ana Bilim Dalı
PROF. DR. HANZADE AÇMA
- Modeling and sensitivity analysis the thermal behaviour of mass concrete with finite volume method
Sonlu hacim yöntemi ile kütle betonun ısıl davranışının modellenmesi ve hassasiyet analizi
FARZAD DANAEI
Yüksek Lisans
İngilizce
2023
İnşaat Mühendisliğiİstanbul Teknik Üniversitesiİnşaat Mühendisliği Ana Bilim Dalı
PROF. DR. YILMAZ AKKAYA