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The Performance Analysis of an Integrated CO2 Refrigeration System with Multi-Ejectors Installed in a Supermarket
(Peer reviewed; Journal article, 2022)The field data from an integrated CO2 refrigeration system installed in a supermarket located north of the capital of Lisbon was analyzed. The goal was to demonstrate the effect and performance of multi-ejectors on a ... -
Performance analysis of an R744 ground source heat pump system with air-cooled and water-cooled gas coolers
(Journal article; Peer reviewed, 2016)In order to decrease the earth's energy imbalance degree, a R744 ground source heat pump system (GSHPS) with air-cooled and water-cooled gas coolers was designed, and the performances of this system were analyzed numerically. ... -
Performance Analysis of Ball Mill Liner Based on DEM-FEM Coupling
(Peer reviewed; Journal article, 2020)In the paper, based on the finite element-discrete element method coupling and the coupled bionics theory, four lifting bar models with coupled bionic surface structures, such as smooth, transverse stripe, longitudinal ... -
Performance analysis of CO2 refrigeration systems in Nordic supermarkets
(Master thesis, 2020)Hydrofluorkarboner erstattes med naturlige kjølemedier i matvareindustrien. Forskning på å erstatte ikke-naturlige kjølemedier med CO2 pågår. Stadig flere supermarkeder i Nord-Europa har kjølesystemer basert på CO2. Faglig ... -
Performance analysis of heat and energy recovery ventilators using exergy analysis and nonequilibrium thermodynamics
(Journal article; Peer reviewed, 2018)The increased attention to energy savings has contributed to more widespread use of energy recovery systems for building ventilation. We investigate the efficiency of such systems under different outdoor conditions using ... -
Performance analysis of high temperature heat pumps and thermal energy storages for a dairy
(Chapter, 2022)This paper analyses the performance of the integrated energy system of an existing dairy in Bergen, Norway. The investigated dairy has an innovative solution for the thermal process supply by using only heat pumps and ... -
Performance Analysis of Prototype Residential CO2 Heat Pump
(Master thesis, 2020)Varmepumper er i dag i svært liten grad benyttet til oppvarming av tappevann i norske boliger. Dette handler i stor grad om at det ikke har hensiktsmessig latt seg gjøre med de konvensjonelle varmepumpene som bruker ... -
Performance analysis of solar assisted R744 ground source heat pump in different climates
(Master thesis, 2014)Som verden står overfor alvorlige miljø- og energikrise, står bergvarmepumpe ut som en effektiv air condition-systemet som kan levere både kjøling og oppvarming belastning for bygningen. Tatt i betraktning den miljømessige ... -
Performance and wake development behind two in-line and offset model wind turbines - "Blind test" experiments and calculations
(Journal article; Peer reviewed, 2014)This is a report on data presented at the ”Blind test 3” Workshop organized jointly by Nowitech and Norcowe in Bergen, December 2013. A number of research groups were invited to predict the performances and the wake ... -
Performance and wake measurements of a Savonius wind turbine
(Master thesis, 2018)In this study, the performance, drag and wake characteristics of a vertical axis Savonius wind turbine are investigated experimentally. The turbine is drag driven and has a helical configuration, making the top rotated 180 ... -
Performance and wake of a Savonius vertical‐axis wind turbine under different incoming conditions
(Journal article; Peer reviewed, 2019)In this study, the performance, drag, and horizontal midplane wake characteristics of a vertical‐axis Savonius wind turbine are investigated experimentally. The turbine is drag driven and has a helical configuration, with ... -
Performance assessment of all-air heating in an office cubicle equipped with an active supply diffuser in a cold climate
(Journal article; Peer reviewed, 2019)Low-temperature space heating systems play a prominent role in improving the indoor air quality (IAQ) and thermal comfort of energy efficient buildings in cold-climate countries such as Norway. All-air heating (AAH) systems ... -
Performance Calculations for a Model Turbine
(Master thesis, 2009) -
Performance Calculations for a Model Turbine
(Master thesis, 2009)En modell av en vindturbin er studert numerisk og eksperimentelt. Dette er gjort for å verifisere at modellen fungerer i henhold til de beregninger som ble lagt til grunn i designprosessen. Vindturbinen har en diameter på ... -
Performance Characteristics of the NREL S826 Airfoil - An assessment of Re-Independency and effect of inflow turbulence
(Master thesis, 2015)Lift- and drag measurements on an NREL S826 airfoil were performed experimentally in NTNU s low-speed wind tunnel. Reynolds number effects were investigated in the range Re = 0.7 × 105 6.0 × 105 at angles of attack ... -
Performance comparison of organic Rankine cycle (ORC) and CO2 cycle for simultaneous utilization of liquefied natural gas (LNG) cold energy and solar energy
(Chapter, 2021)LNG is a good way to transport natural gas from suppliers to consumers. However, the LNG cold energy is generally lost during the regasification process at the receiving terminals. LNG cold energy can be a great heat sink ... -
Performance evaluation of a complete Lagrangian KTGF approach for dilute granular flow modelling
(Journal article; Peer reviewed, 2012)Finely resolved gas–solid flow simulations were carried out using an improved Lagrangian method known as the dense discrete phase model (DDPM). The DDPM differs from the traditional Eulerian two fluid model (TFM) approach ... -
Performance evaluation of CO2 ejector system with parallel compressor for supermarket application
(Chapter, 2018)Evolution in modifications for CO2 system configuration came across from the last two decades has proven to hold the potential in order to improve the overall performance of the CO2 cooling system for various applications. ... -
Performance Evaluation of Combined Heat and Power (CHP) Applications in Low-Energy Houses
(Master thesis, 2013)The Research Centre on Zero Emission Buildings has a vision to eliminate the greenhouse gas emissions caused by buildings related to their production, operation and demolition. The concept of Zero Energy Building (ZEB) has ... -
Performance Evaluation of Ejector Based CO₂ System for Simultaneous Heating and Cooling Application in an Indian Dairy Industry
(Peer reviewed; Journal article, 2020)India is ranked first in milk production, and its goal is to increase annual production to 300 million tons by 2024. The dairy industry requires multi-temperature cooling and simultaneous heating. In the present study, the ...