Blar i Institutt for energi og prosessteknikk på tidsskrift "Energy"
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A feasibility study of HFO refrigerants for onboard BOG liquefaction processes
(Peer reviewed; Journal article, 2023)As the global demand for natural gas continues to increase, the production of liquefied natural gas (LNG) and the demand for LNG carriers are also on the rise. Following the advent of LNG propulsion engines, there has been ... -
Gas switching reforming (GSR) for power generation with CO2 capture: Process efficiency improvement studies
(Journal article; Peer reviewed, 2019)This paper presents the process improvement studies of a combined cycle power plant integrated with a novel gas switching reforming (GSR) process for hydrogen production with integrated CO2 capture. The overall process is ... -
Gas turbine exhaust gas heat recovery by organic Rankine cycles (ORC) for offshore combined heat and power applications - Energy and exergy analysis
(Journal article; Peer reviewed, 2018)Effective heat and power supply to offshore installations leads to environmental benefits, but the efficiency is often limited by requirements and constraints connected to the offshore environment. An exergetic analysis ... -
Global optimization of a hybrid waste tire and natural gas feedstock polygeneration system
(Peer reviewed; Journal article, 2022)The globally optimal design and operation of a process that converts a hybrid waste tire and natural gas feedstock to multiple products (such as electricity, methanol, dimethyl ether, olefins, and liquefied natural gas) ... -
Investigation of control strategies for adsorption-based CO2 capture from a thermal power plant under variable load operation
(Peer reviewed; Journal article, 2023)This work considers the closed-loop behavior of a moving bed temperature swing adsorption process designed to capture CO2 from a coal-fired power plant. Four decentralized control strategies were studied based on step ... -
Model predictive control for a university heat prosumer with data centre waste heat and thermal energy storage
(Journal article; Peer reviewed, 2023) -
Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions
(Peer reviewed; Journal article, 2013)Improved energy efficiency is an issue of increasing importance in offshore oil and gas installations. The power on offshore installations is generated by gas turbines operating in a simple cycle. There is an obvious ... -
A new data mining strategy for performance evaluation of a shared energy recovery system integrated with data centres and district heating networks
(Journal article; Peer reviewed, 2023)This study presents a new data mining strategy to discover the performance and operational patterns of a shared energy recovery (SER) system with a data centre and a district heating network. Multidimensional clustering ... -
A novel methodology for design optimization of heat recovery steam generators with flow-induced vibration analysis
(Peer reviewed; Journal article, 2021)Design of compact, lightweight, and robust heat recovery steam generators (HRSGs) is important for the implementation of offshore bottoming cycles. In this work, a novel methodology integrating flow-induced vibration ... -
Numerical investigation of heat transfer in a CO2 two-phase ejector
(Journal article; Peer reviewed, 2018)In this paper, the influence of heat transfer in the walls of an R744 two-phase ejector on ejector performance was investigated. A numerical investigation was performed using a computational fluid dynamic (CFD) model of ... -
Optimal design and operation of a waste tire feedstock polygeneration system
(Peer reviewed; Journal article, 2021)The optimal design and operation of a polygeneration system that uses a waste tire feedstock to produce a mix of electricity, fuels and chemicals is presented. Rigorous mass and energy balance models for the process are ... -
Optimal integration of compression heat with regenerative steam Rankine cycles in oxy-combustion coal based power plants
(Journal article; Peer reviewed, 2015)The integration of process heat with regenerative steam Rankine cycles by preheating the boiler feedwater increases power generation from the steam turbines. In oxy-combustion coal based power plants, considerable compression ... -
Optimal recovery of thermal energy in liquid air energy storage
(Peer reviewed; Journal article, 2021)The increasing share of renewables in energy systems requires energy storage technologies to handle intermittent energy sources and varying energy sinks. Liquid air energy storage (LAES) is a promising technology since it ... -
Optimization of a dual mixed refrigerant process using a nonsmooth approach
(Peer reviewed; Journal article, 2020)This article uses a nonsmooth flowsheeting methodology to create simulation and optimization models for dual mixed refrigerant processes. New improved operating conditions are obtained using the primal-dual interior-point ... -
Optimization of single mixed-refrigerant natural gas liquefaction processes described by nondifferentiable models
(Journal article; Peer reviewed, 2018) -
Optimization under uncertainty of a hybrid waste tire and natural gas feedstock flexible polygeneration system using a decomposition algorithm
(Peer reviewed; Journal article, 2023)Market uncertainties motivate the development of flexible polygeneration systems that are able to adjust operating conditions to favor production of the most profitable product portfolio. However, this operational flexibility ... -
Optimize heat prosumers' economic performance under current heating price models by using water tank thermal energy storage
(Peer reviewed; Journal article, 2021)Due to heat prosumers' dual roles of heat producer and heat consumer, the future district heating (DH) systems will become more flexible and competitive. However, the current heating price models have not yet supported the ... -
A part-load analysis and control strategies for the Graz Cycle
(Peer reviewed; Journal article, 2022)Carbon capture and storage (CCS) plays a uniquely important role in the future clean and dispatchable power generation portfolio to achieve the ambitious goals set at COP21. The Graz Cycle, a zero emission oxy-combustion ... -
Part-load efficiency boost in offshore organic Rankine cycles with a cooling water flow rate control strategy
(Peer reviewed; Journal article, 2022)Global concerns regarding greenhouse gas emissions and global warming have necessitated the speed up in using renewable energies and more efficient use of fossil fuels in the oil and gas industry. Harvesting gas turbine ... -
Performance mapping of the R744 ejectors for refrigeration and air conditioning supermarket application: A hybrid reduced-order model
(Journal article; Peer reviewed, 2018)The continuous derivation of the ambient temperature and cooling demand in CO2 refrigeration and air-conditioning systems equipped with multi-ejector modules for supermarkets requires the analysis of the fixed ejector ...