RANCANG BANGUN ALAT PENGERING CABAI SISTEM TUBULAR HEATER DENGAN MEMANFAATKAN ENERGI SURYA

Today, the curing process off chili still generally applies natural drying or directly drying in the sun. This would obviously depend on weather conditions and could only be done in the morning until daylight. Therefore, it would require an ingenious dryer to be an alternative when natural dryer cannot be done.in the research, it designed a chili dryer with heat sources of heater from tubular heater. where the electric energy source of the tubular heater element heat is generater from the conversion of energy to a device called solar cells and stored into batteries. The method used was literature studies in which collections where conducted and analyzed a sense of relevant literature with thesis. Then design accordingly and tool making and direct research. This design was a beam made of plywood as the dryer room and inside was try and furnished with a digital thermostat as an automatic temperature regulator while disconnecting an connecting the flow of electric current to the tubular heater.the test wa divided into five different kinds by three test without load and two tests with a load chili. The test without load includes testing the maximum temperatur, the ability of the battery without charging and with a solar cell charger using temperature limit of 100 chelcious degrees, then the testing with a load 1 kg of chili and 6 kg of chili. The test result of this device can evaporate the highest water content of chili by an average of 78,2% for 1 kg of chili, and in the 6 kg of chili the waterr content can be reduced by 41,7% of whith a testing time 8 hoursDewasa ini, proses pengeringan cabai umumnya masih menerapkan pengeringan alami atau menjemur langsung di bawah sinar matahari. Tentunya cara ini sangat bergantung dengan kondisi cuaca dan hanya bisa dilakukan pada pagi hingga siang hari. Oleh karena itu, dibutuhkan suatu alat pengering yang mampu menjadi alat alternatif apabila pengeringan alami tidak dapat dilakukan. Pada penelitian ini dirancang sebuah alat pengering cabai dengan sumber panas dari elemen pemanas listrik tubular heater. Dimana sumber energi listrik elemen pemanas tubular heater dihasilkan dari konversi energi sebuah alat yang bernama sel surya dan disimpan ke dalam baterai. Metode yang digunakan adalah penelitian kepustakaan dimana dilakukan pengumpulkan data dan menganalisa suatu pengertian dari literatur-literatur yang relevan dengan skripsi. Kemudian membuat desain yang sesuai dan membuat alat serta melakukan penelitian secara langsung. Alat ini berbentuk balok terbuat dari triplek sebagai ruang pengering dan di dalamnya terdapat tray dan dilengkapi thermostat digital sebagai pengatur suhu otomatis sekaligus memutuskan dan menyambungkan aliran arus listrik pada tubular heater. Pengujian dibagi menjadi 5 jenis pengujian dengan 3 pengujian tanpa beban dan 2 pengujian dengan beban cabai. Pengujian tanpa beban meliputi pengujian suhu maksimal, kemampuan baterai tanpa pengecasan dan dengan pengecasa sel surya menggunakan batas suhu 100ºC, kemudian pengujian dengan beban cabai 1 kg dan 6 kg. Hasil pengujian alat ini mampu menguapkan kadar air cabai tertinggi sebesar 78,2% pada pengujian 1 kg, dan pada pengujian 6 kg kadar air mampu dikurangi sebesar 41,7% selama 8 jam.

Heat Scanning for the Fabrication of Conductive Fibers

Conductive fibers are essential building blocks for implementing various functionalities in a textile platform that is highly conformable to mechanical deformation. In this study, two major techniques were developed to fabricate silver-deposited conductive fibers. First, a droplet-coating method was adopted to coat a nylon fiber with silver nanoparticles (AgNPs) and silver nanowires (AgNWs). While conventional dip coating uses a large ink pool and thus wastes coating materials, droplet-coating uses minimal quantities of silver ink by translating a small ink droplet along the nylon fiber. Secondly, the silver-deposited fiber was annealed by similarly translating a tubular heater along the fiber to induce sintering of the AgNPs and AgNWs. This heat-scanning motion avoids excessive heating and subsequent thermal damage to the nylon fiber. The effects of heat-scanning time and heater power on the fiber conductance were systematically investigated. A conductive fiber with a resistance as low as ~2.8 Ω/cm (0.25 Ω/sq) can be produced. Finally, it was demonstrated that the conductive fibers can be applied in force sensors and flexible interconnectors.

Instruments and Methods: Portable Thermal Core Drill for Temperate Glaciers

In the summer of 1962 a completely portable and relatively simple electrically heated thermal core drill of new design was constructed and used to obtain 16 oriented samples of ice 2.5 cm. in diameter by 120 cm. in length from depths ranging from 12 m. to 137 m. in lower Blue Glacier, Mount Olympus, Washington, U.S.A. The thermal element is a 0.260-in. (0.66-cm.) diameter 300-W. 150-V. tubular heater bent to form an annulus with an external diameter of 5.0 cm. Opposed ratchet-like teeth break off and hold the core inside the tubular core barrel. Orientation is recorded photographically by a commercial inclinometer modified to show azimuth and to be controlled from the surface.

Instruments and Methods: Portable Thermal Core Drill for Temperate Glaciers

In the summer of 1962 a completely portable and relatively simple electrically heated thermal core drill of new design was constructed and used to obtain 16 oriented samples of ice 2.5 cm. in diameter by 120 cm. in length from depths ranging from 12 m. to 137 m. in lower Blue Glacier, Mount Olympus, Washington, U.S.A. The thermal element is a 0.260-in. (0.66-cm.) diameter 300-W. 150-V. tubular heater bent to form an annulus with an external diameter of 5.0 cm. Opposed ratchet-like teeth break off and hold the core inside the tubular core barrel. Orientation is recorded photographically by a commercial inclinometer modified to show azimuth and to be controlled from the surface.