 Corresponding author: I Gede Bawa Susana Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, Jl. Majapahit No. 62 Mataram-Nusa Tenggara Barat 83125, Indonesia. Copyright © 2021 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0. Evaluate the thermal performance of the dryer using a perforated wall furnace-heat exchanger for drying Ida Bagus Alit and I Gede Bawa Susana * Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, Jl. Majapahit No. 62 Mataram- Nusa Tenggara Barat 83125, Indonesia. World Journal of Advanced Engineering Technology and Sciences, 2021, 02(02), 084–090 Publication history: Received on 24 April 2021; revised on 28 May 2021; accepted on 30 May 2021 Article DOI: https://doi.org/10.30574/wjaets.2021.2.2.0044 Abstract The use of heat exchangers for the process of energy conversion from rice husks to thermal as an alternative to replacing sun drying. Drying with rice husk energy and heat exchanger does not depend on the weather. To determine the effectiveness of this dryer, a thermal evaluation was carried out on the heat exchanger and drying chamber with a sample of 4 kg of shelled corn. The test results showed an increase in the drying temperature of 112.31%. The increase occurred from an average environmental temperature of 30.30 o C to an average drying room temperature of 64.33 o C. The temperature increased significantly by 34.03 o C. This increase in temperature is a result of the use of a black steel pipe heat exchanger, rice husks, and the number of holes in the furnace wall that function as air circulation to help the process of burning rice husks. The distribution of the average temperature on each shelf in the drying room is rack 1 (Ts1) 76.79 o C, shelf 2 (Ts2) 65.24 o C, shelf 3 (Ts3) 59.77 o C, and shelf 4 (Ts4) 55. 52 o C. Keywords: Heat Exchanger; Rice Husk; Temperature 1. Introduction Drying is one way to preserve post-harvest foodstuffs. The Utilizing of the sun in the drying process is the easiest and cheapest way. This is due to the abundance of sunshine throughout the year in Indonesia, especially the island of Lombok. Sun drying is done by drying foodstuffs in an open area. This model affects the less hygienic results of drying products due to exposure to dust or other impurities. In addition, when the weather is cloudy or rainy it will hamper the drying process. To anticipate this, an indirect drying method was developed using biomass energy and a heat exchanger. The heat exchanger is used to heat the environmental air that will be used for the drying process of foodstuffs. Heat exchanger as a tool for implementing heat transfer between two fluids that are separated by a wall and have different temperatures [1]. The heat exchanger design is adapted to the needs of the dryer and the use of an energy source. Coconut coir energy for the drying process of fish using a heat exchanger with aligned tube bundles can produce an average drying temperature of 41.30 o C [2]. The heat exchanger is located separately from the coconut coir furnace with hot smoke flowing in the pipes and environmental air flowing outside the pipes. Types of fluid flow in heat exchangers include parallel flow, counterflow, and crossflow. The temperature distribution in the no-load drying chamber is the lowest 36.3 o C and the highest 66.7 o C using a heat exchanger with a crossflow type and wood biomass energy source [3]. The use of a biomass dryer with a heat exchanger has positive results for increasing the productivity of the dried product. This can be seen based on changes in the rate of water content that occur in the drying process. To reduce the moisture content of maize from 19% to 12%, it takes 62 minutes and 47 minutes, respectively, for air velocities of 2 m/s