59 uppsatser · sida 4 av 4
Även i symbios med solfångare
Rapporten handlar om ett examensarbete omfattande 20 p som är utfört för Thermia AB i Arvika. Uppdragsgivaren ville få fram förslag på möjliga åtgärder som kan minska ljudnivån från en luftvärmeväxlare. För bra helhetsbild av projektet, läs även kapitel: 6. Värmeväxlaren ingår …
En jämförelse av centralt- och lägenhetsplacerat
… consumption are expected to be tougher;therefore a comparison of two different heat recovery ventilation systems(HRV-system) was made. One system is based on a centrally placed unit that coversthe whole buildings ventilation through vertical shafts. The second system is based …
In this report a study has been done regarding different heating systems on which are the most comprehensive with solar heating systems. The report has also been focusing if solar power can be used as a primary heating source for supplying more than 50 % of the buildings total …
En fallstudie av Himmerfja?rdsverket
… internal processes of Himmerfja?rdsverket. Wastewater has a high content of heat energy because of its origin from households and industries. It also holds high concentrations of chemically bound energy as organic compounds and nutrients. The flow of chemically bound energy at …
… set equal to the notion climate. With physical theories about air flow and heat transfer in respect, relations between the components in the climate unit and the compartment has been calculated. Parameters that has had unknown values has been estimated. The relations have then …
Hur de termiska stigkrafterna påverkar ventilationseffektiviteten
… the Navier-Stoke’s equation for Non-Isothermal flow, the relations for General Heat transfer and the relation for Convection and Diffusion. These relations exist as tools in COMSOL Multiphysics. It wasn’t possible to get the model to converge at low air velocities, because the …
Arvika Fjärrvärme AB, a district heating company from Arvika, today cover 74 % of their total energy production with biofuel wich runs a 16 MW bioler giving process water at saturated liquid state. In recent years Vaporel AB has introduced a new tecnique that gives an external …
en jämförelse med kraftvärmeteknologi från biobränsle
… power company should invest in either Nuclear Power or biofuel fired combined heat and power plant on two occasions, 2010 and 2015. The result of the study shows that there is a value for the power companies to have the option to invest in Nuclear power. The value depends a lot …
… result is that self compacting concrete with ”anläggningscement” (Swedish low heat Portland cement) is a sensitive product because many factors needs to be correct to reach a good result. A reason fore this sensitivity is that the recipe of the concrete has a low tolerance for …
… slag sampling and evaluations in microscope have been done for a totalof five heats.The results for each heat have been evaluated in relation to the theory from the literaturesurvey and suggestions for changes in the process to reduce the amount of inclusions whichhave a …
Ett examensarbete om akustik- och brandkrav samt en jämförelse av energi- och fuktaspekter
… calculated in Comsol. The results show that the concrete wall has a higher heat flow than the two wooden walls. VIP-Energy was used to calculate the energy consumption of a house with Kaufmanns construction and the concrete construction. Both of these construction systems …
Simulering och jämförelse av gamla och nya system
… pool covered or not covered during the night. The biggest difference in heat demand was found to be in the two extreme cases, and the use of recirculated air has the highest impact.
tekniska, ekonomiska och miljömässiga förutsättningar för fjärrvärmeproduktion med lokalt skogsbränsle
A third party access to district heating networks has been proposed in Sweden, to increase the competition on the district heating market. Such third party access could create opportunities for the agricultural sector as an energy producer. This study describes the technical …
… by minor differences in model choices, mostly concerning flow patterns and heat transfer. APROS has many similarities with COPTA regarding the main calculation and modeling methods but APROS can in most cases be seen as the more sophisticated software with more possibilities …
