Browsing Institutt for energi og prosessteknikk by Title
Now showing items 2191-2210 of 4164
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Investigation of the effect of indoor environment on hypothermia and energy consumption in operating rooms
(Master thesis, 2021)Årlig får rundt 3.1% av pasienter ved norske sykehus infeksjoner som oppstår i forbindelse med operasjoner (SSI) (St.Olavs, 2019). Flere faktorer vil forebygge infeksjoner, men det er essensielt å holde pasienten i normotermi ... -
Investigation of the Flow through the Runner of a Cross-Flow Turbine
(Master thesis, 2009)The cross-flow turbine is unique due to the generation of power during two stages. The water flows through the rectangular cross-section nozzle and enters the runner, where the first stage power is generated. The water ... -
The investigation of the influence of thermal plume and breathing on sleeping microenvironment
(Peer reviewed; Journal article, 2021)Most of humans’ lifetime was spent indoor, especially in bedroom. Thus, understanding the characteristics of the sleep microenvironment is a prerequisite for better control and improvement of our sleeping environment. This ... -
Investigation of the Model Structure for Low-Order Grey-Box Modelling of Residential Buildings
(Chapter, 2019)Model Predictive Control (MPC) is a key technology to activate the building energy flexibility. A reliable control-based model should be developed for each specific building. The structure of grey-box models is usually ... -
Investigation of the Numerical Methodology of a Model Wind Turbine Simulation
(Journal article; Peer reviewed, 2018)The present work aims to investigate different methodologies for the numerical simulation of an upwind three-bladed wind turbine; which is supposed to be a base model to simulate icing in cold climate windmills. That is a ... -
Investigation of the relationship between water quality variations and cavitation occurence in power plants
(Doctoral thesis at NTNU;2016:26, Doctoral thesis, 2016)Lab experiments on clean water samples have revealed that water may withstand large tension; a state which could be explained as negative pressure, without occurrence of cavitation. At the same time, one struggles to ... -
Investigation of the structure of oxy-fuel flames using Raman laser diagnostics
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:166, Doctoral thesis, 2012) -
Investigation of the Unsteady Pressure Pulsations in the Prototype Francis Turbines -Part 1: Steady State Operating Conditions
(Journal article, 2018)Hydropower is one of the most reliable renewable sources of electricity generation. With high efficiency and good regulating capacity, hydropower has the ability to meet rapid changes in power demand. Large investments in ... -
Investigation of the unsteady pressure pulsations in the prototype Francis turbines during load variation and startup
(Journal article; Peer reviewed, 2017)This work investigates the unsteady pressure fluctuations in two prototype Francis turbines during load variation and start-up. Although hydraulic turbines are expected to experience such events over their lifetime, the ... -
Investigation of Thermopressor with Incomplete Evaporation for Gas Turbine Intercooling Systems
(Peer reviewed; Journal article, 2023)One of the promising ways to increase fuel and modern gas turbine energy efficiency is using cyclic air intercooling between the stages of high- and low-pressure compressors. For intercooling, it is possible to use cooling ... -
Investigation of transcritical CO2 vapour compression systems by simulation and laboratory experiments
(Doktoravhandlinger ved NTNU, 1503-8181; 141, Doctoral thesis, 2002)The thesis presents the use of simulation tools and experimental data for investigation of various aspects of the transcritical CO2 vapour compression cycle. This is done through three papers, the first on design and ... -
Investigation of unsteady flow in the vaneless gap between impeller and diffusor.
(Master thesis, 2016)I denne oppgaven er det undersøkt hvorvidt vibrasjoner i en vertikalsentrifugalpumpe stammer fra sekundærstrømninger i gapet mellom impellerog diffusor. En model av dette gapet ble laget ut fra arbeidstegninger overpumpen ... -
An investigation of using CO<inf>2</inf> heat pumps to charge PCM storage tank for domestic use
(Journal article; Peer reviewed, 2023)Current investigations mainly focused on onefold phase change material (PCM) storage tank charging process, while the integration between a heat-source device and a PCM storage tank has been seldom considered. The investigation ... -
Investigation on an Open Cycle Water Chiller based on Desiccant Dehumidification
(Master thesis, 2012)In this thesis, a novel open cycle desiccant dehumidification system is experimentally studied. The system is installed and operated at Shanghai Jiao Tong University (SJTU) as part of the Green Energy Laboratory (GEL) ... -
Investigation on Ash Slagging Characteristics during Combustion of Biomass Pellets and Effect of Additives
(Journal article; Peer reviewed, 2017)This study reports a systematic investigation into ash slagging behavior during combustion of barley straw and barley husk pellets with or without additives in a residential pellet burner. The slagging tendencies of the ... -
Investigation on CO2 Ground-coupled Heat Pumping System with Ejector
(Master thesis, 2015)After the proposal of CO2 transcritical cycle in 1980s by Professor Gustav Lorentz, researchers have looked into theoretical and experimental research, as well as commercial system development to improve transcritical ... -
Investigation on heat recovery strategies from low temperature food processing plants: Energy analysis and system comparison
(Chapter, 2021)Industrial food processing plants often have significant thermal requirements at both low and high temperatures. These plants can produce a variety of products including frozen, chilled and grilled/steamed foodstuff, ... -
Investigation on the energy performance of using air-source heat pump to charge PCM storage tank
(Peer reviewed; Journal article, 2020)Nowadays air-source heat pumps are widely used to collect heat from ambient air, which can reduce operating cost and protect environment when compared with fossil-based heating systems. To increase the flexibility of heat ... -
Investigation on the performance of fluted tube-in-tube gas cooler in transcritical CO2 heat pump water heater
(Peer reviewed; Journal article, 2021)The utilization of fluted inner tube in tube-in-tube heat exchangers is an effective way to improve the heat transfer performance. Based on the segmented model, the performance of a fluted tube-in-tube gas cooler (FTGC) ...