Performance and economic analysis of natural convection based rubber smoking room for rubber cooperatives in Thailand

JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page.


New design of natural convection rubber smoking room reduces fuelwood consumption.

Fuelwood consumption saving is 66.7% as compare to conventional smoking room.

Thermal efficiency of the rubber smoking room is 15.7% under full load condition.

Payback period of new rubber smoking room were estimated to be 5.7 years.


A modified rubber sheet smoking room was designed, constructed and tested, with uniform hot air flow inside in it, so that the temperature difference between any plane was less than 7 °C. This room can dry up to 1500 sheets in 72 h. Specific fuelwood consumption was 0.42 kg/kg of dried rubber. It consumed 67% less fuelwood and increased the fraction of good quality rubber sheets by 8.5% when compared to a conventional rubber smoking room. Thermal efficiency also increased from 6.9% to 15.7%. Moreover, the modified smoking room can save 1414 USD/year with payback period of 5.7 years. Therefore, the modified design can be recommended to rubber cooperatives for a better return.


Ribbed smoked sheet


Thermal efficiency


Payback period

Choose an option to locate/access this article:

Check if you have access through your login credentials or your institution.

© 2018 Elsevier Ltd. All rights reserved.

Be the first to comment

Leave a Reply

Your email address will not be published.