1,725,267 research outputs found
Memperebutkan Si Ketel Kuning
No full textSebuah ketel kuning dibuang dihutan. Hewan-hewan hutan saling berebut untuk memilikinya. Akibatnya, ketel kuning menjadi jelek, tergores dan penyok. Apa yang terjadi pada ketel kuning itu y
PERENCANAAN KETEL UAP PIPA API
Get PDFKetel Uap ( Boiler ) adalah suatu pesawat tenaga yang mengubah air menjadi uap dengan jalan pemanasan pada temperature dan tekanan tertentu melalui proses pembakaran campuran bahan baker dengan udara di dalam dapur ( Furnace ). Perencanaan Ketel uap pipa api ini bertujuan untuk memahami dan mengaplikasi rancang bangun pada Ketel uap pipa api dengan standard yang ada sehingga ketel uap dapat beroperasi dengan aman. Pada Tugas Akhir ini dirancang ulang Ketel uap pipa api yang ada di PG. Tasikmadu Karanganyar.
Metode perencanaan yang digunakan adalah dengan mengambil data yang diperoleh dari PG. Tasikmadu Karanganyar dan referensi dari berbagai sumber yang berkaitan dengan Ketel uap. Perencanaan ini meliputi perhitungan silinder api, pipa api, lemari api, lemari asap, drum ketel, batang dan pipa tunjang, superheater dan ekonomiser serta cerobong asap.
Berdasarkan hasil perhitungan, maka diperoleh dimensi dan ukuran dari silinder api, pipa api, lemari api, lemari asap, drum ketel, batang dan pipa tunjang, superheater dan ekonomiser serta cerobong asap
Korosi Pada Ketel-Uap
Get PDFKetel-Uap adalah pesawat untuk memanasi air hingga berubah menjadi uap. Uap yang dihasilnya uap-jenuh (saturated-steam) atau uap-panas-Ianjut (superheated-steam), tergantung maksud penggunaan uap. Panas yang diperlukan Ketel-Uap berasal dari reaksi pembakaran bahan-bakar. Reaksi pembakaran menghasilkan gas-gas yang bersuhu sangat tinggi. Gas-asap ini sebagai pemanas dialirkan di dalam Ketel-Uap. Setelah diambil panasnya gas-asap bekas dibuang melalui cerobong. Di dalam Ketel-Uap panas dari gas-asap dipindahkan ke air melewati perantaraan bidang-pemanas Ketel-Uap. Bidangpemanas ini dibuat dari plat-plat dan pipa-pipa baja. Satu sisi bidang-pemanas bersinggungan dengan gas-asap, sisi yang lain bersinggungan dengan air. Gas-asap dan air mempengaruhi peristiwa korosi bidang-pemanas Ketel-Uap pada sisi yang berbeda
Aantekeningen eenigher plaatsen vande onderhoudinge der geboden Godes. Soo wter Godtlijcker Schrifturen, als wten schriften zommiger leeraeren, so oude als nieuwe, tot waerheyts verbredinghe /
No full textVerdediging van Coornhert tegenover de Delftse predikantenVingerafdruk: 158408 - b1 A2 el,$he : b2 D4 erdtVerpakt met de steun van Fonds Inbev-Latour (2010-2012)Herkomst: Vignet Isaac MeulmanBib. Belgica (1964-1970 ed.) ; C 35 (druk toegeschreven Gouda : Gasp. Tournay)Machiels, J. Catalogus van de boeken gedrukt vóór 1600 ; C 623Valkema Blouw, P. Typographia Batava 1220 (druk toegeschreven aan de weduwe Antonis Ketel)Van der Wulp, J.K. Tractaten, pamfletten enz. ; 8755Europeana-GoogleBook
Korosi Pada Ketel-Uap
No full textKetel-Uap adalah pesawat untuk memanasi air hingga berubah menjadi uap. Uap yang dihasilnya uap-jenuh (saturated-steam) atau uap-panas-Ianjut (superheated-steam), tergantung maksud penggunaan uap. Panas yang diperlukan Ketel-Uap berasal dari reaksi pembakaran bahan-bakar. Reaksi pembakaran menghasilkan gas-gas yang bersuhu sangat tinggi. Gas-asap ini sebagai pemanas dialirkan di dalam Ketel-Uap. Setelah diambil panasnya gas-asap bekas dibuang melalui cerobong. Di dalam Ketel-Uap panas dari gas-asap dipindahkan ke air melewati perantaraan bidang-pemanas Ketel-Uap. Bidangpemanas ini dibuat dari plat-plat dan pipa-pipa baja. Satu sisi bidang-pemanas bersinggungan dengan gas-asap, sisi yang lain bersinggungan dengan air. Gas-asap dan air mempengaruhi peristiwa korosi bidang-pemanas Ketel-Uap pada sisi yang berbeda
Callus and cell culture of Tagetes species in relation to production of thiophenes
No full textThe production of thiophene-biocides by cell cultures invitro was simultaneously investigated with Tageteserecta , T.patula and T.minuta . The calli from which the liquid cultures had to be derived differed between species in the appearance of organoid structure, texture, and colour, Independently of the nutrition of the plants and explants. In particular, the difference between the friability of calli of different species Is obviously related to the expression of the activity of silent genes In only a late phase of the callus andlor the cell suspension culture. Therefore 'origin effects' may eventually determine the suitability of calli to Initiate liquid cultures (Chapter 1). The differences between calli, however, showed that the production of thiophenes In the calli was positively related with the measure of differentiation. Rapidly growing and fine granular cell sus~ pensions, for Instance obtained from smooth calli of T.minuta , did not produce thiophenes (Chapters II and III).Differentiated calli of T.erecta did not provide suitable material to initiate cell cultures In liquid medium. However, minced cauliflower-like calli of T.patula with irregularly occurring small root- or shoot-like differentiations, formed large cell aggregates (3- 8 mm) in liquid media. These cell aggregates accumulated non-polar thiophenes and released spontaneously relatively high amounts of a water-soluble thiophene (BBTOH) in to the medium (Chapter VII). Apparently, the Increased morphological dedifferentation of calli runs parallel with a decreased production of thiophenes In the cell suspensions derived from them. The long-term accumulation of thiophenes In cell aggregates and the release of such compounds into the mediom open perspectives for the commercial production of such compounds under fermentor conditions.Embedding of the fine granular suspension cells of T.minuta in alginate resulted in the release of secondary metabolites into the liquid medium, but did not provide adequate conditions to reinitiate the production of thiophenes (Chapter V). In contrast, naturally formed cell aggregates which can be considered as a natural system of entrapment, as formed by T.patula cells, obviously provide suitable conditions for the production of thiophenes.Genetic transformation of intact Tagetes by means of infection with wild-type and mutant strains of Agrobacteriumtumefaciens and A . rhizogenes , induced neoplastic outgrowth of various organized and unorganized tissues without added growth regulators (Chapter VI). The change in this potential may be related to an altered synthesis of endogenously formed phytohormones. The species-dependent relationship between morphological differentiation and thiophene production persisted In all transformed tissues examined.In conclusion, the results of the present experiments on thiophene production in cell cultures of Tagetes species support the view that, despite the totipotency of plant cells (Chapter IV), major differences exist between closely related species in the ability to serve as a biotechnological unit invitro . Consequently, extensive research to adapt a certain recalcitrant plant species for plant cell biotechnology should be avoided by looking for a better producing species.</TT
Cornelis Ketel en zijn familie: een revisie
No full textAbstractIn 1964 this journal published an article by J. Schouten with a family tree of the Ketel family of Gouda; most of the archive records consulted by the author for that purpose were already public. His principal theme, however, was the hypothesis of a third painter in the family by the name of Cornelis Ketel. The first Cornelis, who died in 1567, was the now forgotten uncle and teacher of the second, the well-known painter Cornelis Ketel who died in Amsterdam in 1616; the third Cornelis was the first one's son and thus a cousin of the second. Fresh archive research has yielded a corrected and more extensive family trcc of the Ketel family (fig. 1). Another result of this investigation is the untenability of Schouten's hypothesis: a third Cornelis did exist, but died at an early age before 1582, and there are no indications that he was an artist. Consequently, all Gouda archive records post-dating 1582 or thereabouts refer to the Cornclis Ketel who lived in Amsterdam at that time. Although he did live in Gouda for a few years after 1590/91, it was not in a 'Gasthuis' (almshouse), a misunderstanding caused by an incorrcctly transcribed archive record (fig. 6). A number of paintings which an 'old' tradition - much younger, incidentally, than Schouten would have us believe - ascribes to the second Ketel, and which because of their inferior quality arc attributed by Schouten to the third Cornelis, can therefore not be the work of the latter (figs. 7, 8, 9). Nor are they by the well-known Ketel. The addition of 'de Jonge' (the Younger) to the Amsterdam Ketel's name occurs sporadically in a few Gouda records. This suffix was not meant, as Schouten presumed, to distinguish him from his cousin, who in any case was younger than the Amsterdam Ketel, but to distinguish him as a painter from his elder uncle and teacher. Until work by this teacher is discovered, there is no point in dubbing the pupil 'the Younger'. Ketel did not suffer from gout; his brushless painting is a facet of his artistic versatility. As a matter of fact he did paint a number of works with the brush after 1600. A brother of the third Cornelis, the engineer Jacob whom Van Mander mentions in his biography of Ketel, is apparently identical with the painter Jacques Que(s)tel who lived successively in Orleans, Milan and Paris (fig. 2). He probably did not take up painting until after 1602. In 1608 he made decorations for Queen Maria de Medici's ceremonial entrance into Chartres. No work by him has come to light thus far, but a number of engravings after a portrait he painted in 1609 have survived (figs. 3 and 4). Appendix i traces how a legacy of another uncle of Ketel was distributed and passed on to his descendants. Appendix 2 lists a number of archive records pertaining to Jacob Ketel/Jacques Questel.
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Vanden aflaat Iesu Christi, ghespraken tot grootmakinghe vande eere Godes ende Christi, ende tot voorderinge van der menschen salicheyt /
No full textInden Haghe, den 18. May 84.Met eene voorrede aan allen predicanten van de religie die men noemt gereformeert, so partidigen als onpartijdighenVingerafdruk: 158408 - b1 A2 ele : b2 D3 egenVerpakt met de steun van Fonds Inbev-Latour (2010-2012)Herkomst: Vignet Isaac MeulmanBib. Belgica (1964-1970 ed.) ; C. 36 p. 696 (druk toegeschreven aan Gaspar Tournay)Machiels, J. Catalogus van de boeken gedrukt vóór 1600 ; C 624Valkema Blouw, P. Typographia Batava 1262 (druk toegeschreven aan wed. Antonis Ketel)Van der Wulp, J.K. Tractaten, pamfletten enz. ; 8754Europeana-GoogleBook
KULIAH NYATA MATA KULIAH KETEL UAP
No full textKuliah nyata ini mengunjungi PT. Indonesia Power Unit Bisnis Pembangkitan Semarang waktu pelaksanaan pada tanggal 06 Juni 2008 dengan peserta mahasiswa angkatan 2006. Kegiatan kuliah nyata ini mempunyai tema “Cara Kerja Ketel Uap”. Maksud dan tujuan kegiatan ini adalah : dapat melihat secara langsung proses kerja dari ketel uap, melihat secara langsung bagian – bagian dan bentuk dari ketel uap dan penerapan dari mata kuliah ketel uap pada kehidupan nyata
ANALISIS KERUGIAN PANAS TERHADAP EFISIENSI KETEL UAP
No full textABSTRAK
Cholil, Mohamad Mei Handita, 2018. Analisis Kerugian Panas Terhadap Efisiensi Ketel Uap. Tugas akhir, Program Studi Teknik Mesin, Fakultas Teknik, Universitas Islam Majapahit (UNIM).
Pembimbing I : Achmad Ridjanto, S.T, M.T
Pembimbing II : Dicky Nizar Zulfika S, S.T, M.T
Ketel uap merupakan mesin penghasil uap air dalam kondisi suhu diatas titik cair. Uap air yang mengandung panas dapat dimanfaatkan sebagai tenaga kinetis, termis, dan potensial. Energi panas uap di pabrik gula menggunakan kembali ampas tebu sebagai bahan bakar utama. Ampas tebu memiliki kandungan berupa karbon, sulfur, hidrogen, dan kadar air tertentu. Untuk mendapatkan energi panas yang diharapkan maka diperlukan beberapa treatment pada unsur-unsur pokok dalam ampas tebu tersebut. Pembakaran ampas tebu kemudian dikirim ke dalam ketel uap. Namun jumlah energi panas yang masuk dengan yang digunakan tidak sama karena terjadi kerugian-kerugian panas di dalam ketel uap. Kerugian – kerugian tersebut disebabkan oleh gas cerobong, tak terbakarnya bahan bakar, suhu tinggi pembakaran keluar bersama abu, radiasi. Oleh karena itu, peneliti tertarik untuk melakukan penelitian tentang sebab dan perhitungan kerugian-kerugian panas yang terjadi dalam ketel uap pabrik gula Gempolkrep Mojokerto. Kemudian dapat diketahui persentase efisiensi ketel uap.
Penelitian ini termasuk jenis penelitian kualitatif dan kuantitatif. Peneliti melakukan penelitian di pabrik gula menggunakan teknik observasi, wawancara, dan dokumentasi. Kemudian data diolah ke dalam rumus-rumus kerugian panas. Setelah dilakukan analisis maka diperoleh hasil dari kedua ketel uap tersebut. Masing – masing menunjukkan persentase efisiensi ketel uap dikisaran 70%.
Kata Kunci : Ketel Uap, Metode Tidak Langsung, Kerugian Panas/ Heat Los
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