It is nutrient solution pattern in NFT Beds which is simulated by CFD. The square indicated that the area of root zone.
Nutrient Film Technique
Nutrient Film Technique or NFT is a hydroponic technique whereby a very shallow stream of water containing all the dissolved nutrients required for plant growth is recirculated past the bare roots of plants in a watertight gully, also known as channels. Ideally, the depth of the recirculating stream should be very shallow, little more than a film of water, hence the name 'nutrient film'. This ensures that the thick root mat, which develops in the bottom of the channel, has an upper surface which, although moist, is in the air.
Greenhouse Technology
A greenhouse is a structure with a different types of covering materials, like glass or plastic roof and frequently glass or plastic walls; it heats up because incoming visible solar radiation (for which the glass is transparent) from the sun is absorbed by plants, soil, and other things inside the building.
Wednesday, January 5, 2011
Monday, January 3, 2011
Mempercepat Pembuatan Kompos dengan Mesin Komposter Listrik
1:01 AM
Posted by Abdul Wahab | Comments (2)
Dalam kehidupan kita selalu ada kebutuhan yang harus dipenuhi. Terdapat tiga kebutuhan utama manusia yaitu sandang, pangan, dan papan. Kadang kala demi mendapatkan kebutuhan-kebutuhan ini manusia rela melakukan aktivitas apa pun. Sebagai contoh kebutuhan pangan, manusia kerap kali harus dihadapkan untuk berusaha keras untuk memperolehnya. Bidang pertanian merupakan bidang yang paling berkaitan langsung dengan kebutuhan pangan. Namun, selama alur produksi hingga konsumsi kebutuhan pangan tersebut paling banyak menimbulkan sampah jenis organik.
Meskipun banyak menimbulkan sampah organik, tetapi manusia kerap kali tidak peduli dengan sampah yang berkomposisi 68% ini. Sampah organik bisa menimbulkan bahaya pencemaran udara jika jumlah yang dihasilkan sangat banyak dan tidak dapat ditangani dengan benar. Hal ini sering dialami oleh kota-kota besar di Indonesia.
Tumpukan sampah di salah satu sudut kota Jakarta
Berikut ini adalah desain mesin komposter listrik tersebut:
Komposter Listrik Full Preview
Komposter Listrik Transparant Preview
Pisau pencacah pada Komposter Listrik (untuk sampah basah)
Hammer Mill pada Komposter Listrik (untuk sampah kering)
Pisau pencacah dan hammer mill pada komposter ini dapat diganti sesuai dengan kebutuhan bahan baku sampah (kering atau basah).
Pengaduk pada Komposter Listrik
Untuk lebih jelasnya, anda bisa mendonload full papernya pada download area.
Full Paper
12:25 AM
Posted by Abdul Wahab | Comments (0)
To download full paper of Electrical Composter Machine, please klick the following link:
Electrical Composter (Indonesian)
Report (Indonesian)
Specification (Indonesian)
Password: aw-berbagi
To download full paper of my research "Material Selection of NFT Beds Using Computational Fluid Dynamic (CFD)", please klick the following link:
Electrical Composter (Indonesian)
Report (Indonesian)
Specification (Indonesian)
Password: aw-berbagi
To download full paper of my research "Material Selection of NFT Beds Using Computational Fluid Dynamic (CFD)", please klick the following link:
Saturday, January 1, 2011
Abstract of Research
6:59 PM
Posted by Abdul Wahab | Comments (0)
MATERIAL SELECTION ON NUTRIENT FILM TECHNIQUE (NFT) BEDS USING COMPUTATIONAL FLUID DYNAMIC (CFD)
Abdul Wahhaab1, Herry Suhardiyanto1, and Ahmad Indra Siswantara2
1 Departement of Mechanical and Biosystem Engineering, Faculty of Agricultural Technology, Bogor Agricultural University, IPB Dramaga Campus, PO BOX 220, Bogor, West Java, Indonesia
2 Departement of Mechanical Engineering, Faculty of Engineering, University of Indonesia, Depok, West Java, Indonesia
ABSTRACT
Nutrient Film Technique (NFT) is one of hydroponic technology that nutrient solution circulate in a crop's root zone at anytime with 3 mm tickness. A computer model has been developed to simulate the thermal distribution of NFT beds using Computational Fluid Dynamic (CFD). The objective of this research are to develop a simulation model of moving heat flow of nutrients in the NFT bed in several types of materials with a CFD program and to determine the optimal type of materials in the design of beds. The crop that is used as a object of a research is a tomato. Tomato grown in two different beds, with and without zone cooling. CFD use for simulate heat transfer on these beds and simulate on model of beds with several different materials.
The results showed that the distribution of nutrient solution temperature along the beds change over time follow the greenhouse temperature. The simulation on different material of beds like PVC, fiberglass, glass, asbestos, porcelain, cement, and styrofoam showed that fiberglass is the highest temperature 28.9-32.3 oC and porcelain is the lowest temperature 28.9-31.2 oC. Otherwise, the lowest heat transfer coefficient is fiberglass and the highest is porcelain. High or low heat transfer coefficient will affect the release of heat from inside the beds to the environment. According to analysis, the optimum of material which used for NFT beds design are cement, porselaian, and glass.
Keywords: Material, NFT Beds, CFD
For full paper, you can download it on 'download category'
Tea Plant Cultivation and Orthodox Tea Processing
3:05 AM
Posted by Abdul Wahab | Comments (0)
Tea is the agricultural product of the leaves, leaf buds, and internodes of various cultivars and sub-varieties of the Camellia sinensis plant, processed and cured using various methods. "Tea" also refers to the aromatic beverage prepared from the cured leaves by combination with hot or boiling water, and is the common name for the Camellia sinensis plant itself. After water, tea is the most widely consumed beverage in the world. It has a cooling, slightly bitter, astringent flavour which many enjoy.
In July 2009, I learn about cultivation and processing of orthodox tea at PT. Perkebunan Nusantara VIII, Malabar. There are so many aspect can we learn there. I took a theme Agricultural Engineering Aspect at PTPN VIII, Malabar to complete of my subject in campus. Here, I shared the report of it. You can download it but it is still in Indonesian.
Please klik here
CAD Design
3:04 AM
Posted by Abdul Wahab | Comments (0)
Computer-aided design (CAD), also known as computer-aided design and drafting (CADD), is the use of computer technology for the process of design and design-documentation. Computer Aided Drafting describes the process of drafting with a computer. CADD software, or environments, provide the user with input-tools for the purpose of streamlining design processes; drafting, documentation, and manufacturing processes. CADD output is often in the form of electronic files for print or machining operations. The development of CADD-based software is in direct correlation with the processes it seeks to economize; industry-based software (construction, manufacturing, etc.) typically uses vector-based (linear) environments whereas graphic-based software utilizes raster-based (pixelated) environments.
CADD environments often involve more than just shapes. As in the manual drafting of technical and engineering drawings, the output of CAD must convey information, such as materials, processes, dimensions, and tolerances, according to application-specific conventions.
CAD may be used to design curves and figures in two-dimensional (2D) space; or curves, surfaces, and solids in three-dimensional (3D) objects.[1]
CAD is an important industrial art extensively used in many applications, including automotive, shipbuilding, and aerospace industries, industrial and architectural design, prosthetics, and many more. CAD is also widely used to produce computer animation for special effects in movies, advertising and technical manuals. The modern ubiquity and power of computers means that even perfume bottles and shampoo dispensers are designed using techniques unheard of by engineers of the 1960s. Because of its enormous economic importance, CAD has been a major driving force for research in computational geometry, computer graphics (both hardware and software), and discrete differential geometry.[2]
CADD environments often involve more than just shapes. As in the manual drafting of technical and engineering drawings, the output of CAD must convey information, such as materials, processes, dimensions, and tolerances, according to application-specific conventions.
CAD may be used to design curves and figures in two-dimensional (2D) space; or curves, surfaces, and solids in three-dimensional (3D) objects.[1]
CAD is an important industrial art extensively used in many applications, including automotive, shipbuilding, and aerospace industries, industrial and architectural design, prosthetics, and many more. CAD is also widely used to produce computer animation for special effects in movies, advertising and technical manuals. The modern ubiquity and power of computers means that even perfume bottles and shampoo dispensers are designed using techniques unheard of by engineers of the 1960s. Because of its enormous economic importance, CAD has been a major driving force for research in computational geometry, computer graphics (both hardware and software), and discrete differential geometry.[2]
CFD
3:02 AM
Posted by Abdul Wahab | Comments (0)
Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows. Computers are used to perform the calculations required to simulate the interaction of liquids and gases with surfaces defined by boundary conditions. With high-speed supercomputers, better solutions can be achieved. Ongoing research, however, yield software that improves the accuracy and speed of complex simulation scenarios such as transonic or turbulent flows. Initial validation of such software is performed using a wind tunnel with the final validation coming in flight tests.