합성가스를 위한 소용량 상업용 엔진 발전기의 적용

하비네자엘리에젤 ( Eliezel Habineza ),홍성구 ( Seonggu Hong ) 한국농공학회 2020 한국농공학회 학술대회초록집 Vol.2020 No.-

The present research study intends to adapt the existing LPG engine generator for fully operated by syngas. The biomass (woodchips and charcoal) will be underrepresented for syngas production for power generation. During this study a 6.0KW LPG engine generator will be modified and tested for operation on syngas from a woodchip/charcoal powered gasifier. In the experiments, Syngas and LP Gas fuels will be tested as test fuels. For modification along with a flexible air/fuel mixture control system; an electronic control unit will be designed and used for metering the correct amount of air to match the combustion needs of the engine. The heating value of LP Gas vary 46-51MJ/kg while the HV for syngas is approximately 4.5MJ/kg, the power generated from LP Gas is about 6.0KW. The power generated from syngas will be recorded using CW 240 Clamp-on Power meter by varying different loads for performance analysis of LPG engine generator modified.

합성가스 적용 소형 엔진 발전기의 구동특성

하비네자엘리에젤 ( Eliezel Habineza ),홍성구 ( Seonggu Hong ) 한국농공학회 2020 한국농공학회 학술대회초록집 Vol.2020 No.-

Biomass gasification produce a low calorific fuel gas, producer gas which can be used for running engines and various applications. Engines or engine generators dedicated to use the producer gas are mostly expensive compared to existing commercial equipment. This study modified carburettor of small commercial gas engine generator to get proper air-fuel ratio for the producer gas. The biomass such as woodchips and charcoal was used to supply producer gas from a downdraft gasifier. The engine generate 6 kW for LPG and 5 kW for natural gas. In the experiments, syngas and LP Gas will be used for the operation of the genset. For modification along with a flexible air/fuel mixture control system; an electronic control unit is designed and used for configuring the correct amount of air to match the combustion needs of the engine. The heating value of LP Gas vary 46-51MJ/kg while the HV for syngas is approximately 4.5MJ/kg, The power generated from producer gas will be measured using CW 240 Clamp-on Power meter for different loads to investigate its performance.

Development of soil water content monitoring system using Raspberry Pi and Arduino communication

하비네자엘리에젤 ( Eliezel Habineza ),알리모하마드 ( Mohammod Ali ),아흐메드샤리아르 ( Shahriar Ahmed ),레자나심 ( Md Nasim Reza ),장영윤 ( Young Yoon Jang ),정선옥 ( Sun-ok Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

Soil water content is a key requirement for plant growth and development. Monitoring the soil water content continuously at several locations may offer accurate water variability data for irrigation scheduling. The aim of the study was to design and fabricate an automated data acquisition system for monitoring the variations of soil water content within the experimental soil bin through Raspberry Pi and Arduino serial communication. For evaluating the sand soil water content variability, a soil bin test bench (3m*3m) containing sandy soil was built and 90 soil water content sensors were inserted at different depths of 10, 20, 30, 40, and 50 cm, respectively. For water supply in the soil bin, a drip irrigation system containing 3 rows (60 cm inter-row distance) with 5 drippers each pipeline with 30 cm intervals, was designed. Raspberry Pi (Pi4 model B+) and three Arduino (Mega 2560) were interfaced with sensors and the data were obtained using python programing language. The data was automatically recorded in the external Pi-memory for further processing and remote monitoring was performed using a Raspberry Pi VPN system. During the experiment, the maximum and minimum averages of the ambient temperature, humidity, and the soil water content values were recorded and found to be 42.1±3 to 32.7±3°C, 75±2 to 42.9±4% and 60.91±2 to 26.95±1%, respectively. The water content percentages varied at different depths of sandy soil due to pressure difference, flow rate, and water infiltration rate. The designed automatic irrigation monitoring system would help to monitor water variability in soil.

Design of an ICT-based Irrigation Control System for Orchard Soil Water Content Monitoring

아흐메드샤리아르 ( Shahriar Ahmed ),알리모하마드 ( Mohammad Ali ),하비네자엘리에젤 ( Eliezel Habineza ),정선옥 ( Sun-ok Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

Deficient or excessive irrigation inhibits root growth and increases the risk of essential minerals being leached from the root zone, causing a nutritional deficiency. Irrigation scheduling can be managed based on soil water stress. The purpose of this study was to design an automatic control system for irrigation based on real-time soil water content monitoring in orchard soil which was capable of being accessed remotely via the internet. A test bench was fabricated in a soil bin. Soil water content sensors were installed in separate channels across the test bin to maintain the average water content for different circumstances. A python-based program was created to control the irrigation pump and solenoid valves using water content values from sensors via a micro-controller. Additionally, a python program was developed to transfer all the data from water content, water flow and pressure sensors to a database system to monitor the irrigation operation using a WI-FI network. The system was able to sense analog values from water content sensors, water flow and pressure sensors. The water content values after reaching 25% and 30%, the system sent signals to the irrigation pump and solenoid valves and terminated the irrigation process accordingly. Besides the system sent all the sensors values to the database system every 1-minute interval. With the proposed low-cost real-time monitoring system, it could help to increase production efficiency, use less labor, reduce water loss, and optimize water consumption.

Impact Of Variability In Dynamic And Solar Intensity On Ground Canopy Sensors Detecting Vegetation Indices

하케아스라쿨 ( Asrakul Haque ),레자나심 ( Nasim Reza ),하비네자엘리에젤 ( Eliezel Habineza ),강영호 ( Yeong Ho Kang ),이경도 ( Keong Do Lee ),정선옥 ( Sun-ok Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

The popularity of ground based sensors (active crop canopy sensors) is going upward for determining crop growth status and recommending additional fertilizer. By employing these sensors, Vegetation indices (VI) amplified the significance of identification in determining crop nutritional status. However, The sensor output might be continuously affected by operating and ambient factors such as movement speed and solar radiation respectively. In this study, we investigated the effects of movement speed and PAR (Photosynthetically Active Radiation) on the consistency of Crop Circle ACS-435 & DAS44X during NDVI (normalized differential vegetation index) measurement. The effects of these two parameters were evaluated on different platforms. Several movement speeds (0, 0.1, 0.2, 0.3, 0.4, and 0.5 ms-1) and PAR at different times of a sunny day with no cloud interference (10.00- 11.00, 13.00- 14.00, and 16.00- 17.00 hrs) were considered as factors to be assessed for enhancing the sensors' accuracy in plant health detection. In addition, linear regression models, Root mean square error (RMSE), and additional graphical analysis was employed to assess the effects of sensor movement speed and solar source intensity. A significant difference in speed was found in Crop-circle and DAS44X during the calculation of the NDVI. However, the difference in illumination intensity didn’t appear to have much effect on Crop-circle and DAS44X. Data acquisition has been shown to be most effective at speeds up to 0.3 ms-1 and at any time of day for both sensors in order to produce the highest output feasible. These findings illustrated the speed range certainty and daytime flexibility of Crop-Circle and DAS44X.

Theoretical fatigue analysis of spiral bevel gears for a utility track vehicle in various agricultural operations

알리모하마드 ( Mohammod Ali ),아스라푸자만구란다즈 ( Gulandaz Md Ashrafuzzaman ),레자나심 ( Md Nasim Reza ),하비네자엘리에젤 ( Habineza Eliezel ),정선옥 ( Sun-ok Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.1

To ensure the durability of gears a fatigue analysis is essential to avoid failure during field operations under various dynamic loads. Therefore, the objective of the study was to conduct a theoretical fatigue analysis of spiral bevel gear to calculate the service life of the power transmission part of a utility track vehicle that is under development. A field experiment was performed to measure the applied load (torque) of the gear in various agricultural operations. A torque measurement system was developed to collect the axle torque data of the vehicle. The load duration distribution (LDD) method was applied to analyze the torque data to assess cyclic load characteristics. The Palmgren-Miner cumulative damage model was employed to predict fatigue failure levels of spiral bevel gears. The fatigue life under an empty platform with the driver, a lawnmower, a sprayer-trailer (150-L payload), and a lawnmower and 150-L payload trailer was recorded from 13,000 to 25,000 h approximately, which was a sufficient lifespan range of gears for 12-years service life. According to the analyses, the gears met the standard service life during field operations with attached implements. The results provided in this study can be used to design power transmission systems of utility vehicles for multipurpose agricultural operations.