Essays about: "Heat balances"

Showing result 11 - 15 of 31 essays containing the words Heat balances.

  1. 11. Perspectives of a climate-neutral urban district : Evaluation of greenhouse gas emissions, exergy and energy balances

    University essay from Högskolan i Gävle/Avdelningen för byggnadsteknik, energisystem och miljövetenskap

    Author : Petter Berner Wik; [2020]
    Keywords : Carbon neutral district; energy passive district; sustainable cities; exergy positive district; passive- nearly zero- and plus-energy buildings;

    Abstract : A climate-neutral city can be viewed at in many different aspects. This report investigates the greenhouse gas, exergy and energy balance for both heat pumps and district heat supply at local, national and methane gas perspectives of the energy conversion processes. READ MORE

  3. 12. Field study of the drought’s impact on feeding strategy and biological parameters in early lactation dairy cattle

    University essay from SLU/Dept. of Animal Nutrition and Management

    Author : Mikaela Würtz; [2019]
    Keywords : dairy cattle; drought; energy balance; feeding; metabolism;

    Abstract : The summer of 2018 was unusually warm and dry. For animal production, this resulted in poor pastures, reduced harvests of crops, such as roughage and grains, and increased risk for heat stress in the animals. The drought led to problems as in shortage of animal feed, which made the feeding of dairy cattle difficult. READ MORE

  4. 13. Catalytic hydrotreating of lignin

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Markus Lilja; [2019]
    Keywords : Lignin; hydrotreating; kemiteknik; chemical engineering; Chemistry; Technology and Engineering;

    Abstract : One of the main challenge’s society faces today is climate change caused by CO2 due to the de-pendence on fossil fuels. To combat the increasing CO2 levels there is a need to develop renewable fuels. One such fuel could potentially be derived from lignin. In this thesis, lignin derived from a pulp and paper mill was first treated and cleaned. READ MORE

  5. 14. Market potential for using demand response from heat pumps in multi-family buildings

    University essay from Uppsala universitet/Fasta tillståndets fysik

    Author : Rebecca Grill; [2018]
    Keywords : Demand response; electricity distribution; balance responsibility party; heat pump; balance market; mFRR; intraday; energy balance; electricity grid; förbrukningsflexibilitet;

    Abstract : More renewable energy leads to higher energy imbalances in the Swedish electric power system. In the same time, the grid capacity is almost reached in some regions which requires an extension of the current grids or a reduction of the power consumption. READ MORE

  6. 15. Heat and mass transferlimitations in the pyrolysis of wood particles

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Carlos Daniel Rodriguez Sotelo; [2018]
    Keywords : ;

    Abstract : Biomass is a viable option to supply the need of renewable energy inthe future. However, the high cost of biomass processing makes the process not viable economically. For that reason, two one dimensionalparticle models that describe the mass and heat transfer of biomasswere developed and solved using the method of lines. READ MORE