Essays about: "direct normal radiation"

Found 5 essays containing the words direct normal radiation.

  1. 1. Effects of solar parabolic- trough collectors in small- scale district heating systems

    University essay from Linnéuniversitetet/Institutionen för byggd miljö och energiteknik (BET)

    Author : Alejandro Monterrubio; [2022]
    Keywords : Parabolic-trough collector; direct normal radiation; diffuse radiation; insolation; carbon abatement cost; biomass; District Heating; Levelized cost of energy;

    Abstract : Reducing carbon emissions in our societies requires a massive shift towards renewables. In Sweden, biomass is the dominant source for the district heat production, but growing demand for biomass in other sectors may cause pressure on it. READ MORE

  3. 2. Development of methods for detection of radioactive aerosols of special importance for the ESS facility

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Martin Carlström; [2021]
    Keywords : alpha spectrometry; radioactive aerosols; spectrum simulation;

    Abstract : With the construction of the European Spallation Source (ESS) steadily approaching the operational phase, an environmental monitoring program will soon be implemented with the purpose of monitoring emissions. With regard to radiation safety, it is highly important to monitor alpha emitting radionuclides in aerosol form. READ MORE

  4. 3. Should we point them away from the sun? -A study in PV spectral tracking in a Scandinavian climate

    University essay from Lunds universitet/Avdelningen för Energi och byggnadsdesign

    Author : Petter Stefansson; [2015]
    Keywords : PV spectral response.; radiative transfer model; spectral mismatch factor; spectral irradiance; Solar tracking; Technology and Engineering;

    Abstract : Conventional photovoltaic solar tracking is commonly done by aligning the surface normal of a PV module with the direction from which direct solar irradiation is coming from. While this tracking design has proven to perform well in sunny climates, solar tracking is altogether less common in northern climates where the direct solar irradiance is weaker. READ MORE

  5. 4. Advanced Ray Tracing Techniques for Simulation of Thermal Radiation in Fluids

    University essay from KTH/Mekanik; KTH/Linné Flow Center, FLOW

    Author : Bernhard Semlitsch; [2010]
    Keywords : Thermal radiation; Solar radiation; Solar energy; Heat transfer;

    Abstract : For modeling thermal heat transfer, not only the effects of convection and conduction are relevant, but also thermal and visible radiation. Radiation is especially important for setups with large temperature differences, as well as for interaction with external light sources. READ MORE

  6. 5. Construction and Evaluation of a Controlled Active Mass (CAM) : A new cooling system design for increased thermal comfort using low exergy sources

    University essay from Institutionen för teknik och byggd miljö

    Author : Shahriar Ghahremanian; Setareh Janbakhsh; [2007]
    Keywords : Controlled Active Mass; CAM; passive cooling; low exergy; Thermal mass; measurements; PMV; PPD; thermal comfort;

    Abstract : Nowadays, office buildings often have large temperature variations during the day and building envelope acts as an energy storing mass and damp these effects and so Offices need more cooling because of internal heat sources. But we know that cooling is more expensive than heating and it uses the very good quality of energy sources (exergy). READ MORE