Judul: Desain dan Uji Kinerja Pengering Surya Tipe Terowongan Konveksi Bebas untuk Pengeringan Pisang
Abstrak: Solar tunnel dryer is one type of solar dryers that is usually used. Main problem of this dryer is the electricity needs to turn on fan which is not available in isolate areas and heat flow distribution that have not been spread evenly. This research aims to design a solar tunnel dryer with air exchange process occurs naturally due to free convection, and to test performance of the dryer for banana chips drying and compare the results between the dryers which designed with sun drying. The observation parameters are solar radiation, themperature, ratio of humidity, and moisture content, whereas the total energy consumption used declared as specific energy consumption. Total drying time is 13.25 hours, total irradiation received is 26.23 MJ/m2, able to reduce the moisture content up to 14.58 % from the initial moisture content of 70.03 % with a specific energy consumption of 14.05 MJ/kg water evaporated. The dryer designed produce free convection air flow, heat flow pattern shows the distribution pattern of temperatures that peaked in the middle. Average air flow velocity at the inlet is 0.09 m/s, at the outlet is 0.12 m/s, and at around dryer is 0.59 m/s. The result showed that final moisture content of the dryer (14.58 %) is lower than the moiture content of sun dried sample placed 100 cm above the floor which as high as sample on dryer (24.42 %), but its still higher than sun dried sample placed 10 cm above the floor (13.21 %).
Keyword: free convection, solar tunnel dryer, drying

Judul: Design and Performance Test of PV/T for Cassava Drying
Abstrak: Singkong merupakan salah satu pangan pokok di Indonesia. Singkong dapat diolah menjadi tepung singkong. Tepung singkong dibuat dengan mengeringkan singkong menjadi gaplek. Proses pengeringan gaplek umumnya dilakukan dengan penjemuran di atap atau tanah lapang Hal ini dapat mengakibatkan penurunan kualitas singkong karena kontaminasi bakteri dan jamur seperti aspergillus sp. Selain itu cuaca yang tidak menentu juga dapat memperlambat proses pengeringan. Pengeringan dengan alat pengering dapat menjadi solusi permasalahan tersebut. Desain pengering yang tepat diperlukan untuk mencapai target pengeringan yaitu kadar air singkong sebesar 14% b.b dan durasi pengeringan yaitu 5 hari atau kurang. Penelitian ini bertujuan untuk membuat sistem pengering singkong yang dapat menghasilkan energi secara mandiri dan bersih. Penelitian dimulai dengan merancang pengering singkong berkapasitas 4 kg dan bahan dengan potongan berbentuk chips setebal 3-4 cm. Ruang pengering didesain agar sampel dapat dialirkan udara secara maksimal. Rancangan sistem PV/T menggunakan panel surya 100 Wp seluas 0.67 x 0.76 m dengan kolom penukar panas yang terbuat dari kayu berlapis insulator. Fabrikasi pengering dilakukan setelah proses desain selesai. Pengujian pengering dilakukan 3 kali. Pengering singkong yang telah dibuat dapat mengeringkan singkong hingga mencapai kadar air rata-rata sebesar 30.77% b.b selama 5 hari dengan kelembaban udara absolut rata-rata pada cerobong sebesar 23.25 g uap air/kg udara kering dan suhu pengering rata-rata sebesar 37.76 °C., Cassava is one of the staple foods in Indonesia. Cassava can be processed into cassava flour. Cassava flour is made by drying cassava to produce cassava chips. The drying process for cassava chips is commonly done by sun drying on rooftops or open ground. However, this can result in a decrease in cassava quality due to bacterial and fungal contamination, such as Aspergillus sp. Additionally, unpredictable weather conditions can also slow down the drying process. Using a drying apparatus can be a solution to these problems. The appropriate drying design is needed to achieve the drying target, which is a moisture content of 14% (wet basis) and a drying duration of 5 days or less. This study aims to create a cassava drying system that can generate independent and clean energy. The research begins with designing a 4 kg capacity cassava dryer with sample chips thickness of 3-4 cm. The drying chamber is designed to allow for maximum airflow through the sample. The PV/T system design utilizes a 100 Wp solar panel with dimensions of 0.67 x 0.76 m and a heat exchanger column made of insulated wood. Fabrication of the dryer is carried out after the design process is completed. The dryer is tested three times. The constructed cassava dryer is capable of drying cassava to an average moisture content of 30.77% (wet basis) over 5 days, with an average chimney absolute humidity of 23.25 g of moisture/kilogram of dry air and an average drying temperature of 37.76 °C.
Keyword: Energy, Cassava, Drying, Performance, PV/T system

Judul: Distemper Pada Anjing
Abstrak: Distemper merupakan penyakit infeksius pada bimbingan anjing yang menduduki tempet teratas dan penyakit ini tersebar di seluruh bagian dunia dimana terdapat anjing-anjing yang dipelihara, terutama pada anjing-anjing muda di kota-kota besar, pada kelompok-kelompok anjing atau pada situasi lain dimana banyak terdapat kontak antara anjing. Penyakit ini disebabkan oleh virus yang termasuk dalam famili Paramyxoviridae dan genus Morbilivirus. Infeksi virus ini sering disertai oleh infeksi sekunder oleh kuman Staphylococcus, streptococcus, Brucella bronchiseptica dan kuman Salmonella, inilah yang kadang-kadang sebagai penyebab kematian.
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