Blar i UiS Brage på forfatter "Zhang, Qian"
-
Assessing Impact of Borehole Field Data’s Input Parameters on Hybrid Deep Learning Models for Heating and Cooling Forecasting: A Local and Global Explainable AI Analysis
Ahmed, Naveed; Assadi, Mohsen; Zhang, Qian; Awadelseed, Abdelazim Abbas Ahmed (Peer reviewed; Journal article, 2023)Achieving accurate performance forecasting of borehole heat exchanger is essential for optimizing ground source heat pump systems, enabling optimal control, and facilitating energy-efficient operations with enhanced ... -
Comparison of different configurations of a solar-assisted ground-source CO2 heat pump system for space and water heating using Taguchi-Grey Relational analysis
Sazon, Thor Alexis Salazar; Zhang, Qian; Nikpey Somehsaraei, Homam (Peer reviewed; Journal article, 2023)This work deals with the comparison of different optimized configurations of solar-assisted ground-source CO2 heat pump systems using the Taguchi method and Grey Relational Analysis (GRA) when used for simultaneous space ... -
Day-ahead optimal scheduling of micro gas turbine-based microgrid considering electricity and heating energy
Zhang, Qian; Assadi, Mohsen (Peer reviewed; Journal article, 2023)Microgrids are considered as the crucial element in the integration of various distributed energy resources in buildings. They are capable of operating in both grid-connected and islanded mode and have shown immense potential ... -
Development of a surrogate model of a trans-critical CO2 heat pump for use in operations optimization using an artificial neural network
Sazon, Thor Alexis Salazar; Zhang, Qian; Nikpey Somehsaraei, Homam (Peer reviewed; Journal article, 2023)Conventional physics-based models can demand substantial computational resources when employed for operational optimization. To allow faster system simulations that can be employed for operational optimization, a surrogate ... -
High Cloud Point Polyvinylaminals as Non-Amide-Based Kinetic Gas Hydrate Inhibitors
Kelland, Malcolm Andrew; Dirdal, Erik Gisle; Zhang, Qian (Peer reviewed; Journal article, 2020-06)In recent years, we have explored non-amide-based classes of kinetic hydrate inhibitor (KHI) polymers to determine if the same level of performance can be achieved as commercial KHI polymers, which all contain amide groups. ... -
Investigation of New Classes of Amide and Non-amide Kinetic Hydrate Inhibitors
Zhang, Qian (PhD thesis UiS;538, Doctoral thesis, 2020-09)The formation of gas hydrates can cause pipeline blockage during the transportation of gas and oil products, which is one of the main challenges for flow assurance in the petroleum industry. It is uneasy to remove gas ... -
Multi-functional oilfield production chemicals: maleic-based polymers for gas hydrate and corrosion inhibition
Kelland, Malcolm Andrew; Pomicpic, Janronel Calog; Ghosh, Radhakanta; Undheim, Camilla; Hemmingsen, Tor; Zhang, Qian; Varfolomeev, Mikhail A.; Pavelyev, Roman S.; Vinogradova, Svetlana S. (Peer reviewed; Journal article, 2021)Several chemical problems can occur during the production of oil and gas through flow lines. This includes corrosion, scale deposition and gas hydrate plugging. Three separate chemicals may be needed to treat these issues. ... -
N‑Oxide Polyethers as Kinetic Hydrate Inhibitors: Side Chain Ring Size Makes the Difference
Zhang, Qian; Limmer, Larissa; Frey, Holger; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021)The formation of gas hydrates in flow lines is one of the most severe problems for flow assurance in the gas and oil industry. Developing effective kinetic hydrate inhibitors (KHIs) to avoid the problem of gas hydrate ... -
Reliability and Performance of Vinyl Lactam-Based Kinetic Hydrate Inhibitor Polymers after Treatment under a Range of Conditions
Kelland, Malcolm Andrew; Zhang, Qian; Dirdal, Erik Gisle; Mady, Mohamed Fawzy Hamed Attia (Peer reviewed; Journal article, 2021)Well-known kinetic hydrate inhibitors (KHIs) such as poly(N-vinylcaprolactam) (PVCap), poly(N-vinylpyrrolidone) (PVP), and 1:1 N-vinylcaprolactam:N-vinylpyrrolidone (VCap:VP) copolymer have been subjected to a range of ...