Development and Evaluation of Solar-Powered Instrument for Hydroponic System in Limapuluh Kota, Indonesia.

Abstract

This solar-powered instrument utilized in plant cultivation in hydroponic system was developed to minimize operational cost, to maintain continuity of electrical source and to release dependency from electric utility. The instrument consist of solar tracker to adjust photovoltaic panel position, aquarium pump to distribute the nutrition, humidity and temperature meter to measure humidity and temperature, respectively. To support the function of this instrument 40 watt energy should be provided per hour in average. Following power measurement conducted in 50 Kota, 200WP of solar panel will produce roughly 70 watt at peak hour. The solar energy is stored to a couple of 100AH deep cycle battery, Arduino board microcontroller as brain of the system plays roles to control dc motor and timer and to calculate data signal from RTC, humidity and temperature sensor. The data are then sent to LCD matrix 2x16 which will display the measurement. This instrument is expected to be used by hydroponics farmer in remote area.

Energy demand analysis via small scale hydroponic systems in suburban areas – An integrated energy-food nexus solution

“…Regarding electricity, it can be seen, based on a number of studies (Aldrich and Bartok, 1994;Hernandez, 2016;Wallace and Anciso, 2016;Putera et al, 2015) that the average electricity consumption is between 14-17 kWh/m 2 per year, depending on the hydroponic unit structure (e.g. number of tiers and real cultivated area) and the produced product.…”

Results of Experimental Research on Computerized Intellectual Monitoring Means of Effective Greenhouse Illumination

“…Having analyzed the existing studies on the development of illumination monitoring systems, we can state that integrated sensors based on photodiodes and photoresistors are most widely used (Boselin Prabhu et al, 2014;Arif and Abbas, 2015;Zhou and Duan, 2016;Li, 2017;Laktionov et al, 2018). In this paper, typical sensors based on a photodiode (GY-302 BH1750FVI) and a photoresistor (KY-018) have been selected for the research according to the following criteria: satisfactory technical characteristics specified by manufacturers; compatibility with the microprocessor platform Arduino Mega 2560, which is widely used in designing the monitoring systems for agricultural facility parameters (Putera et al, 2015;Maulana et al, 2018;Suganthi Jemila and Suja Priyadharsini, 2018); affordable price range. The main technical characteristics of the GY-302 BH1750FVI (Light intensity Sensor Module GY-30 BH1750FVI, 2018) and KY-018 (KY-018 Photoresistor Module, 2018) sensors are given in Table 3, the physical configuration of the sensors is shown in Figures 3 and 6.…”

An Effective Method of Regenerative Braking for Electric Vehicles

“…R and L are the resistance and inductance of the motor armature; e a , e b , and e c are the back-emfs; S 1 -S 6 represent the turning-on switches of the inverter; whereas D 1 to D 6 are the freewheeling diodes. The dc-link capacitor between the battery and inverter is used as temporary energy storage [17]. The inverter operation of this BLDC motor is based on the six-step method.…”

“…The energy involved during the plugging process is given in (16), whereas the energy being returned to the battery during the regenerative process is given in (17). By considering,…”

“…Being compared to the previously proposed methods, the technique proposed in this paper offers some advantages such as increasing the battery efficiency, as well as the comfort and ease of operation [17]. It brings the possibility to operate on all variations of speed just by using a single brake-lever.…”