75 uppsatser · sida 5 av 5
… the motivation in a negative respect. At the same time, the motivational value steaming from extensive freedom, outweigh these negatives, resulting in motivated employees.
In Uppsala CHP Plant, there are six pressure reducing valves to reduce the pressure from 15 to 3 bars, before six absorption heat pumps. During the process the energy is conserved but losses occur in form of exergy. The aim of this thesis is to reduce the losses of exergy. This …
… within this study, a typical Scandinavian digester and a modern twin vessel steam phase digester. Due to quality aspects and low temperature level drying is the drying technology with dry warm air rejected. Using warm water in direct contact with wood chips increases the …
… handled thereof.MW Power in Sävsjö, Sweden designs and manufactures water and steam boilers for the customer's unique needs. MW Power invested in a new plasma cutting ma-chine but the machine has not reached the expected capacity. The capacity prob-lem is due to time consuming …
En utvärdering av värdeflödesanalys och miljövärdeflödesanalys
… done in the Risifrutti production because of the lack of energy meters for steam, electricity and compressed air in the production lines.
… ORC (Organic Rankine Cycle). This process is based on the Rankine process (the steam process), the difference from the traditional Rankine process is that instead of water as a working medium, an organic substance is used. The main component used in the process is a evaporator …
… of the measurements indicate that the high level is not only caused by steam, but to an unusually large amount of water in the tank at the high-profile occasions.
För att ha en chans att ändra trenden med ökande utsläpp av växthusgaser är internationella samarbeten nödvändiga. Därför har EU genom miljökvalitetsmålet Begränsad Miljöpåverkan satt krav på högsta tillåtna utsläpp av växthusgaser. Att sänka energianvändningen för upp- värmning …
Klarläggande av framtida hållbarhet
… and outside the combustion engine. The most common method of production is steam reforming of natural gas but produces high CO2 emissions. There are eco-friendly methods using only water as a raw material, but at the present they are expensive and need to be developed. The …
jämförelse av befintlig pastörisering med integrerad termofil hygienisering på Kungsängens gårds biogasanläggning i Uppsala
… a heat exchange from bio manure to substrate, followed by heating to 52°C by steam addition. The heat requirement was 0.24 kWh/kg VS and the electricity demand was 0.034 kWh/kg VS. The warming of the digesters was the same as in the present pasteurization system. The comparison …
jämförelse av befintlig pastörisering med integrerad termofil hygienisering på Kungsängens gårds biogasanläggning i Uppsala
… a heat exchange from bio manure to substrate, followed by heating to 52°C by steam addition. The heat requirement was 0.24 kWh/kg VS and the electricity demand was 0.034 kWh/kg VS. The warming of the digesters was the same as in the present pasteurization system. The comparison …
En beskrivande litteraturstudie
… state of matter. The first generation district heating used high-temperature steam for heat transfer and then the newer distribution technologies resulted in lower temperatures and change of phase, from gas to liquid. The third generation of district heating distribution …
… result. The systems with absorption heat pumps uses drive heat from existing steam production and can cover a major part of the peak load during winter. Meanwhile the compression heat pumps have a large cost for electricity. This causes a negative net present value according to …
samt förslag på energieffektiviserande åtgärder
… salads. This type of work involves energy-intensive processes, such as steam generation, compression of air and refrigeration of large spaces. These needs are supplied with electricity. Furthermore, the industry is a major consumer of district heating, particularly for heating …
Där värme- och elproduktion samt lönsamhet studeras och avfall är huvudbränslet
… to increase in the future. The combined ORC and heat pump operates as a steam turbine system during summer and as a heat pump during winter, with an organic working fluid. Electricity will be produced during summers and heat will be produced during winters. The electricity can …
