TLS Application:Testing the Thermal Conductivity of Papayas in Determining Appropriate Freezing Time
Figure 1. Papaya fruit (Source: Prathyush Thomas)
In this work – we summarize how to measure the thermal conductivity of papaya (Carica papaya) for such purposes. The papaya fruit is a tropical fruit commonly cultivated in in India, Brazil, Indonesia, Nigeria, and Mexico. The C-Therm TCi Thermal Conductivity Analyzer configured with a Transient Line-Source (TLS) sensor to test the thermal conductivity of the fruit.
Figure 2. Thermal conductivity test results on papaya
The sample was tested using the transient line-source method using a 15cm sensor and a 2.5 minute test time. The repeatability between different locations was 2.8%, suggesting there existed some regional variation in the thermal conductivity of the papaya. As fruits are complex solids composed water, carbohydrates, fatty acids, protein, minerals and vitamins, some degree of regional variation was to be expected.
Thermal conductivity and thermal diffusivity of papaya (Carica papaya L.) and cashew apple (Anacardium occidentale L.) Condutividade e difusividade térmica do mamão (Carica papaya L.) e do caju (Anacardium occidentale L.)
Freezing Point and Thermal Conductivity of Tropical Fruit Pulps: Mango and Papaya
Determination of thermal diffusivity in papaya pulp as a function of maturation stage