CONSTRUCŢIA VENTILATOARELOR CE ECHIPEAZĂ MAŞINILE PENTRU TRATAMENTE FITOSANITARE UTILIZATE ÎN HORTICULTURĂ

The fans of the spraying machines are playing and important role in assuring the quality of the phytosanitary treatments. A study upon the fans construction and performances is made in the present paper. There are considered the main fan types: axial and centrifugal ones, that are used to equip the spraying machines for orchards and vineyards. It is presented in detail the construction and the working process of the axial fan with a deflection system, the newest fan construction for the machines used in the vineyards and orchards treatments

STUDIES UPON THE DEVELOPMENT OF AN INTEGRATE SYSTEM FOR PRODUCTION AND USE OF CAMELINA SATIVA IN THE TRANSYLVANIAN PLAIN CONDITIONS (I)

The present paper is the first part of a series dedicated to the development of an integrate system for production and use of Camelina Sativa. There will be studied during a five years research programme the optimum crop technologies for the Transylvanian Plain conditions, together with the best use of the crop. The agricultural year 2011-2012 was characterized by being very dry. The first experimental results were encouraging, demonstrating that Camelina sativa is not claiming special cropping conditions, being suitable for the Transylvanian Plain area. The best results (1,95 t/ha) were achieved using a 176 plants/m2 density and a ration N/P/K of 100/66,8/40 (25 cm between the rows). Harvesting one of the most important parts of the technological chain, as it could lead to high yield losses without and accurate adjustment of the combine.

BIOGAZUL O IMPORTANTĂ RESURSĂ ENERGETICĂ (I)

Biogas an important energy resource. European countries are committed to reduce CO2 emission originating from fossil fuels. On-farm produced biogas may replace energy produced from fossil fuels and so contribute to achieve the target.Biogas technology is a complete system in itself with its set objectives (cost effective production of energy and soil nutrients), factors such as microbes, plant design, construction materials, climate, chemical and microbial characteristics of inputs, and the inter-relationships among these factors. Brief discussions on each of these factors or subsystems are presented in this paper. Any biodegradable organic material can be used as inputs for processing inside the biodigester. However, for economic and technical reasons, some materials are more preferred as inputs than others. If the inputs are costly or have to be purchased, then the economic benefits of outputs such as gas and slurry will become low. Also, if easily available biodegradable wastes are used as inputs, then the benefits could be of two folds: (a) economic value of biogas and its slurry; and (b) environmental cost avoided in dealing with the biodegradable waste in some other ways such as disposal in landfill. One of the main attractions of biogas technology is its ability to generate biogas out of organic wastes that are abundant and freely available.Operating efficiency of the utilisation of the produced biogas effects decisively the amount of the energy produced

OPTIMIZATION OF THE BIOGAS PRODUCTION IN THE ROMANIAN FARMS CONDITIONS

In the paper there are presented the results of the BIOGEF research project that was carried on by and integrate team and was focus on the biogas production in the small medium farms conditions. Anaerobic digestion provides possibilities to produce renewable energy from organic wastes in decentralized sites, producing a methane rich biogas from manure (human and animal) and crop residues. Apart from supplying renewable energy the biogas plants have other positive effects including the strengthening of closed loop recycling management systems, reducing emissions from manure storage and producing a valuable organic fertilizer. It can also create new sources of income for farmers

DEZVOLTAREA CONSTRUCTIV-FUNCŢIONALĂ A VENTILATOARELOR CE ECHIPEAZĂ MAŞINILE PENTRU TRATAMENTE FITOSANITARE DIN POMICULTURĂ

THE CONSTRUCTIVE DEVELOPMENT OF THE FANS THAT ARE EQUIPPING THE SPRAYING MACHINES USED I N HORTICULTURE The fans of the spraying machines are playing and important role in assuring the quality of the phytosanitary treatments. A study upon the fans construction and performances is made in the present paper. There are considered the main fan types: axial and centrifugal ones, that are used to equip the spraying machines for orchards and vineyards. It is presented in detail the construction and the working process of the axial fan with a deflection system, the newest fan construction for the machines used in the vineyards and orchards treatments

TEHNOLOGII MODERNE DE PROTECŢIE A LIVEZILOR ÎMPOTRIVA ÎNGHEŢULUI

MODERN TECHNOLOGIES FOR ORCHARD PROTECTION AGAINST FREEZING Orchards protection against freezing during the cold season is an important objective of farmers situated in the temperate continental regions. In this direction one solution could be tower ventilating system developed by the TANESINI Company. The system is using the thermo inversion phenomena ventilating the warmer air to the trees area. So, each ventilating tower (12 m height) could cover a surface of 3,2...3,5 ha. The power request by the system is about 90 … 136 HP. The proposed system has a high efficiency in the Transylvanian conditions

SISTEME DE ALIMENTARE A BIOREACTOARELOR INSTALAŢIILOR DE BIOGAZ

Feeding systems for biogas plants. The present paper presents the feeding systems that are used in the case of biogas plants. It is presented in detail the construction and the functional mode of the main types of feeding devices according to the general plant technological conception and to the unit size

RESEARCHES UPON SOME DEDROLOGICAL MACHINES (I)

The public domain and forestry nursery require a great volume of manual labour. One of the technology work that is demanding the most important work volume is the extraction of the dendrology material. According to this fact the developing of a machine able to solve this manual work represents an important target. In the present study are presented the testing results of the EXPLANT-500 machine destined for the dendrology material extraction, carried out in the working conditions from the Cluj-Napoca nursery

MAŞINI PENTRU RECOLTAREA ARDEILOR

Mechanization of paprika harvesting. Labour consumption in horticulture is an important factor for increasing the products price. In this direction, one of the most difficult technological operations is harvesting. The paper presents the technical possibilities of mechanization in the case of paprika harvesting. It is analysed the machine construction and its working process. The products quality is considered in relation with the action of the detaching and transport organs, correlated with machine working speed

RESURSE DE BIOMASĂ PENTRU PRODUCEREA DE BIOENERGIE (I)

Biomass resurces for energy production. Production of renewable energy is an important target for all the EU countries in their action plans for reducing the GRG emissions. In the case of Romania biomass is an important resource that can be used for renewable energy production. In the present paper there is analysed the country potential considering the agro-pedological conditions