Novel process for the rapid and efficient generation of superheated steam using a water-containing porous material

Shoji Mori, Soichiro Hida, Mikako Tanaka, Kunito Okuyama

Research output: Contribution to journalArticle

Abstract

Heat treatment by superheated steam has been utilized in several industrial fields including sterilization, desiccation, and cooking. Saturated and superheated steam is used in a number of home appliances, such as humidifiers, steam cookers, and steam irons. In these applications, in order to save electricity, it is necessary to produce steam on demand. Therefore, quick start-up and cut-off responses are required. However, most electrically energized steam generators require a relatively long time to generate steam due to the large heat capacities of the water in the container. We proposed a new method using containing porous material to generate saturated or superheated steam quickly. Steam may be generated rapidly using containing porous material because the heat capacity of the water in the meniscus is extremely small. The main objective of the present work was to show the performance of rapid steam generator we proposed and experimentally investigate the effect of the effective thermal conductivity of the porous material on the rapid and efficient generation of saturated and superheated steam. As a result, in order to generate superheated steam quickly and efficiently, the generator should be constructed from low-thermal-conductivity material. The energy utilization efficiency was analyzed based on a simplified one-dimensional model of the heat and fluid flow in the porous material, the calculated results were shown to be in good agreement with the experimental results. Based on the proposed model for the energy utilization efficiency on steam generation, the proposed rapid superheated steam generator is suitable for miniaturization.

Original languageEnglish
Pages (from-to)1159-1168
Number of pages10
JournalInternational Journal of Heat and Mass Transfer
Volume93
DOIs
Publication statusPublished - Feb 1 2016
Externally publishedYes

Fingerprint

Steam
porous materials
steam
Porous materials
Water
water
boilers
Steam generators
Specific heat
Thermal conductivity
thermal conductivity
Energy utilization
specific heat
Domestic appliances
menisci
Cooking
miniaturization
electricity
containers
heat transmission

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Novel process for the rapid and efficient generation of superheated steam using a water-containing porous material. / Mori, Shoji; Hida, Soichiro; Tanaka, Mikako; Okuyama, Kunito.

In: International Journal of Heat and Mass Transfer, Vol. 93, 01.02.2016, p. 1159-1168.

Research output: Contribution to journalArticle

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