324 uppsatser · sida 1 av 22
a case study of mango and avocado in Ethiopia
… food security it is important to focus on ways to decrease post-harvest losses of food products and not only have the productivity of agriculture in focus. Food losses after harvest until the food reach the consumer are significant. According to FAO post-harvest losses in …
An important process for grid companies in order to reduce power losses in electricity distribution grids is to figure out where and how they appear. This report describes the factors that cause power losses in low voltage distribution grids and methods for how they could be …
… within the farm is accounted for (farm-gate method) and nitogen surpluses and losses are related to hectare of arable land. This method is used within the Swedish advisatory project "Greppa Näringen" today. The other perspective, the Milk-perspective, includes a life cycle …
en jämförelse av indikatorer för att beskriva näringsbelastningen
… of the main sources of nitrogen and phosphorus supply is agriculture. Nutrient losses from arable land have been increasing as agricultural production has intensified. At the end of the twentieth century an increased awareness of these problems led to the formation of …
Utveckling av programvaran Wind Farm ElectricSystem Calculator (WFESC)
… the cost for accumulated reduced income over several years (due to electrical losses), has to be added. The economic lifespan is relatively long (about 20 years) which means that an error in the loss calculation could lead to a bad decision basis. The accumulated reduced incomes …
Storage of biomass is associated with problems like heat development, biomasslosses, and reduction of the fuel quality. Certain processes such as biological- andchemical degradation are responsible for these storage problems. This master?sthesis was carried out at Vattenfall …
… biomass is often associated with problems such as heat development, dry matter losses and reduction of fuel quality. The rise in temperature can potentially cause a risk of self-ignition in the fuel storage. Moreover, emissions from storage piles can cause health problems in the …
… produces benefits in combustion quality but appears to generate large field losses of biomass that have not yet been accounted for. A satisfactory technique exists for autumn harvest of green hemp for biogas production. In this study we carried out field tests to measure …
… focus of the thesis has been to increase productivity by decreasing the power losses in an electric tool. The productivity is defined as the maximum number of tightenings a nutrunner can perform without becoming too hot. Before starting the development of this design tool an …
This thesis aims at determining the heat losses in a property vent stack and its roof valve. Upon request of a company, the vent stack is analysed for possible heat recovering solutions to be implemented, while relining of the drain system is executed and with a suitable payback …
… dairy and then suggest simple but effective solutions to minimize the losses for each production run. If the timeframe allowed it, some of the solutions would be implemented and tested in full production to determine their impact on economic and environmental savings. The very …
Identifiering av för- och nackdelar med nätstationsmätning, Mälarenergi Elnät AB
… transformer´s secondary low voltage side that measures the low voltage network losses for that specific substation. By doing so, grid companies can, due to the calculation of the low voltage network losses, identify and address issues such as illegal power dissipation …
… A literature study was done to be able to make an estimation of the dry matter losses of the bark caused by storage. An interview/ questionnaire investigation was carried out to about 60 different sawmills to get knowledge about the handling of the sludge bark. Internet was also …
… balcony was 3.4ºC with an outdoor temperature of -1.2ºC. Then when the energy losses through the balcony abutments were calculated, with the heat calculation programme HEAT2, it was established that the en-ergy loss was 88.0 W/K, where the concrete heel caused more than half of …
… of the buildings climate shell or in an unheated space leads to thermal heat losses. The aim with this essay is to investigate how significant the heat losses are on exterior placed ventilation systems. The investigation has been done with help of theoretical calculations and …
