Determination of physical and thermal properties of herbal compress ball

Main Article Content

Sommai Trichaiyaporn
Sophida Tangkhananon
Kanlayanee Niyomsa
Krongkaew Thawilprapa
Nattagul Srisuk


This study investigated determination of physical and thermal properties of herbal compress ball. These properties are dispensable for studying heat transfer mechanism and process because herbal compress balls are generally heated by steam before use. Some physical and thermal properties of dried herbal compress ball were measured and characterized in this study. Some reliable measuring methods of such properties as well as in-house-made gas expansion pycnometer were developed. Experimental results showed that significant physical and thermal properties were successfully measured and in-house-built apparatus could work well with small error (+0.70%). Also, it was obvious that the temperature change in herbal compress ball was strongly affected by diffusion of steam inside the herbal compress ball and its thermal conductivity was close to that of woods.

Article Details

How to Cite
Trichaiyaporn, S. ., Tangkhananon, . S. ., Niyomsa, . K. ., Thawilprapa, K., & Srisuk, . N. . (2018). Determination of physical and thermal properties of herbal compress ball. Journal of Engineering, RMUTT, 16(2), 163–172. Retrieved from
Research Articles


Department of Science Service, Ministry of Science and Tech-nology. Herbal compress Ball (Dry). [Internet] 2012 [Cited 2016 May 3]. Available from: http:// Thai)

Be Thanks. Herbal Heritage of Thailand. [Internet]. 2016 [Cited 2016 May 3]. Available from: Thai)

Mohsenin NN. Physical Properties of Plants and Animal Materials. New York: Gordon and Breach, Science Publishers Inc; 1980.

Shea JE. US Patent 2,667,782. Apparatus for measuring vol-umes of solid materials. 1954.

Turner PL, Gilkey RW, Lagus PL. US Patent 4,083,228. Gas compa-rison pycnometer. 1978.

Furuse A. US Patent 4,888,718. Volume measuring apparatus and method. 1989.

Tamari S. Optimum Design of the Constant-volume Gas Pycno-meter for Determining the Volume of Solid Particles. Meas. Sci. Technol. 2004;15:549–558.

Buckman HO, Brady NC. The Nature and Property of Soils - A College Text of Edaphology. 6th ed. New York: MacMillan Publishers; 1960.

Thai community product standard 176/2553. Thai Industrial Stan-dards Institute, Ministry of Industry. 2010.(in Thai)

The Association of Official Analytical Chemists. AOAC Official Method 925.10 - Solid (Total) and Moisture in Flour, Air Oven Method. In Official Methods of Analysis of AOAC INTERNA-TIONAL. 17th ed. 2nd Rev. Ch32, p1. Gaithersburg, MD: The Association of Official Analytical Chemists, International; 2002.

Welty JR, Wicks CE, Wilson RE. Fundamentals of Momentum, Heat, and Mass Transfer. 3rd ed. New York: John Wiley & Sons; 1984.

Ainong (Ellen) S. Comparative Me-thods of Determining Heat Transfer Coefficients over Moist Food Materials. [Master of Science Thesis]. Oregon State University; 1997.

Perry RH. Perry’s Chemical Engineers’ Handbook. 6th ed. Japan: McGraw-Hill; 1984.