CORDIS oferuje możliwość skorzystania z odnośników do publicznie dostępnych publikacji i rezultatów projektów realizowanych w ramach programów ramowych HORYZONT.
Odnośniki do rezultatów i publikacji związanych z poszczególnymi projektami 7PR, a także odnośniki do niektórych konkretnych kategorii wyników, takich jak zbiory danych i oprogramowanie, są dynamicznie pobierane z systemu OpenAIRE .
Rezultaty
All tested materials were permeable to water vapour, so moisture can move inside the insulation layer in form of water and water vapour. Due to variations in thermal conductivity values, it must be pointed out that insulation capacity of a product depends on the manufacturing process. The smaller variations the quality of insulation production has - the better.
Moisture content of insulation layer also affects the insulation capacity, and therefore the structures should be designed so that the relative humidity inside the structure is as low as possible.There is a growing interest for diffusion-open ("breathable") structures in Finland. These are insulated with hygroscopic insulation, and hemp is one possible material for them. Hygroscopic insulation has been considered as protection against condensation. However, there is always a risk of structural failure or other unpredictable event, and therefore an organic insulation must be treated with fungicide.
Choosing the proper type of fungicide is a challenging task. Manufacturing techniques should be developed to spread and attach the chemical to the insulation product. Using a windshield with thermal insulation capacity, e.g. mineral wool board, decreases moulding risk by improving conditions inside the structure.
Air permeability was not measured during this study. Visual inspections indicate that air permeability of hemp is at the same magnitude as other fibrous insulation materials with same density. Therefore, a windshield must be used in external walls insulated with any type of hemp material.
The use of hemp for thermal- and footstep sound insulation is welcome on ecological aspects:
1.Today hemp is in the typical ecological ranking of insulation materials made of renewable resources.
2.Hemp can increase by suitable production conditions in contrast to other insulation materials in the ecological area.
3.Hemp has the potential to be a low-priced insulation material among sustainable scope conditions.
4.The ecological footprint and the Primary Energy Index (PEI) show in the same direction: Hemp insulation wool (HDW) and hemp footstep sound insulation (HTM) are very interesting ecological products.
5.The economic scope conditions (agricultural cultivation method, energy supply, ways of transporting and kind of packing) have a great influence on the ecological pollution over the life cycle assessment.
D.7.2 The catalogue of building elements puts together 40 different examples of building components in order to show the variety of the possible applications. The data sheet is set up with the detail drawing and the respective physical-construction parameters beside comments. A series of tests of building components have delivered the measurement values. This application-catalogue is supplemented with guidelines for installation that give information about application areas, delivery volumes, planning and installation of the hemp-insulation materials.
D.7.3 Guidelines for installing material description, guidelines for the building site It is very important that worker know how to install hemp insulation products. In this brochure 7 different insulation products made of hemp are described. You can find the following information for each hemp insulation product:
- Area of application;
- Suitability and use;
- Building physical properties;
- Manufacturing method-measurements;
- Delivery program;
- Recommendation for installing;
- Information for planning.
The objective was to develop a new cutting method with a band saw, arranged with a hydraulic system. The benefits of the band saw are the lack of back and forth movement and relatively low vibrations and great cutting speed compared to the cutter bar.
The problems of the common cutter bar mower are relatively high friction forces but the benefit is the mechanical stability. According to the measurements the power requirement of a band saw mower is greater than it is with common cutter bar. The speed of a band blade is much higher, more than twenty times higher. To improve the full-scale band saw mower there is a need to develop the blade supports and to minimize side vibrations of the blade. Also if an "endless" type of blade is utilized into use in practice the on-line sharpening device needs to be developed.
The suggested cutting method for spring harvesting fibre hemp is to use a common cutter bar mower. While harvesting fibre hemp with the mower the cutter bar has to be in immaculate condition. Also speed of the cutter bar needs to be increased for approx. 50%. At present the driving mechanism of the sickle is not sufficient for this speed, it has to be reinforced.
The method to windrow the cut material after the mower is suggested to manufacture a drifter that decreases the width of the windrow. After mowing the hemp is baled from field into round bales by baler. The losses in baling process are remarkable at this stage of harvesting process. The round bales are suggested to be restored outside with a plastic cover or in a barn for further processing.
The U values obtained from the test were slightly greater than the theoretical U values. This can be explained by variation in material quality, by heat transfer through the wooden parts of test structure and by heat losses through the space between test structure and metering box.
Structures insulated with hemp insulation products perform almost at the same thermal resistance as structures insulated with other porous insulation materials. Therefore, there is no need to add thickness of insulation in shell structures. This is an advantage, because present construction details can be used. This makes design and construction simple and cost-effective.
From the building's physical point of view, hemp insulation can be used as thermal insulation in the same way as other nature fibre insulation materials. Insulation products must be treated with mould retardant. The inside of the structure should be relatively vapour-tight to decrease moisture load of the structure.
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