Essays about: "air change efficiency"

Showing result 26 - 30 of 76 essays containing the words air change efficiency.

1. 26. Comparison of a hybrid ventilation system and a mechanical ventilation system with heat recovery through life cycle assessment : A case study of a modern Danish office building

   University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

   Author : Josefine Nilsson Willkomm; [2020]
   Keywords : life cycle assessment; ventilation system; environmental impact; hybrid ventilation system; mechanical ventilation system with heat recovery; livscykelanalys; ventilationssystem; miljöpåverkan; ventilation; hybrid ventilationssystem; mekaniskt ventilationssystem med värmeåtervinning;

   Abstract : The building sector is responsible for 36% of the energy usage and 39 % of all CO2- emissions in European union (EU). Therefore, it is of great interest to investigate how the building sector can become more energy efficient and lower the environmental impact. READ MORE

3. 27. Evaluation of decentralized ventilation system with heat recovery

   University essay from Lunds universitet/Avdelningen för Energi och byggnadsdesign; Lunds universitet/Institutionen för arkitektur och byggd miljö

   Author : Sunkavalli Kowshik Chowdary; [2020]
   Keywords : Decentralized ventilation; airflow; air draught; heat exchangers; tracer gas; Technology and Engineering;

   Abstract : Humans spend 90% of their times indoors, and maintaining a pleasant indoor environment is essential. Factors like human behaviour, combustion sources, cleaning supplies, affect the indoor environment, which could potentially affect the human health.the most common answer to controlling the indoor environment is a good HVAC system. READ MORE

4. 28. Improving cell secretome analysis and bacteria evolution by means of acoustophoresis

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

   Author : Moritz Leuthner; [2020]
   Keywords : acoustophoresis; acoustofluidic; lab-on-a-chip; acoustic streaming; acoustic radiation force; particle trapping; particle washing; bulk acoustic waves; BAW; media exchange; cell manipulation;

   Abstract : In both, cell secretome analysis and bacteria evolution, controlled handling of particles with a few to sub-micrometers in size and media exchange are inevitable in order to investigate body fluid’s proteins or change the surrounding culture conditions for pivoted evolution. Typically, nanofiltration and ultra-centrifugation are employed which can lead to cell damage, need large sample volumes and have a high sample loss. READ MORE

5. 29. Experimental investigation of ventilation performance of corner placed stratum ventilation in an office environment

   University essay from Högskolan i Gävle/Energisystem och byggnadsteknik

   Author : Gasper Choonya; [2019]
   Keywords : Stratum ventilation; local air change index; air change efficiency; ventilation effectiveness; draught rate; percentage dissatisfied; heat removal effectiveness;

   Abstract : Energy use in buildings account for about one third of the total global energy supply and contributes as much as 30% of the anthropogenic greenhouse gas emissions. It is estimated that energy use in buildings will increase to 67% by 2030. READ MORE

6. 30. Experimental and CFD Study of Heat Pickup in Cooling System Hoses

   University essay from KTH/Strömningsmekanik och Teknisk Akustik

   Author : August Borg; Michael Owen; [2019]
   Keywords : ;

   Abstract : This thesis investigates a process known as heat pickup which occurs in vehicle cooling system hoses. Heat pickup is an unwanted side effect of temperature differences in a car underhood compartment, whereby excess heat is tranferred into the coolant running through the cooling system hoses, affecting its operating temperature. READ MORE