Qatar University Institutional Repository
The top service priorities of QSpace are to collect materials originating from faculty, students, and guests of Qatar University, provide necessary metadata to fulfill a complete bibliographic record, provide open access full-text content to everyone, and preserve content in a secure format for long-term continued access.
Sub-communities within this community
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Academic [30450 items ]
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FIFA World Cup Qatar 2022 [164 items ]
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Recent Submissions
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Educational leadership for social justice: A systematic review of empirical evidence
( Wiley , 2025 , Article)Educational leadership for social justice is a recurrent educational theme and endeavour with significant implications for creating equitable and inclusive educational ecosystems where all children thrive. However, social ... -
The fourth estate's invisible hand: how newspaper media legitimize neoliberal higher education in Qatar and the UAE
( Frontiers Media , 2025 , Article)This study critically examines how English-language newspaper discourse in Qatar and the UAE constructs and legitimizes neoliberal ideologies surrounding higher education institutions and international branch campuses. ... -
An optimal control strategy for ASHP units with a novel dual-fan outdoor coil for evener frosting along airflow direction based on GRNN modelling
( Elsevier , 2023 , Article)It was demonstrated in previous related experimental and modelling studies that an ASHP unit having a novel dual-fan outdoor coil (ASHP / DFOC) can help achieve evener frosting along airflow direction in the outdoor coil, ... -
An experimental study on the defrosting performances of an ASHP having a novel dual-fan outdoor coil under different levels of frosting evenness along airflow direction
( Elsevier , 2024 , Article)Uneven frosting along the airflow direction is a common phenomenon that can accelerate deteriorating the heating efficiency of ASHP units under frosting conditions. To effectively alleviate this uneven frosting phenomenon, ... -
Developing a novel control strategy for frosting suppression based on condensing-frosting performance maps for variable speed air source heat pumps
( Elsevier , 2023 , Article)Effective frosting suppression was crucial to further wider applications of air source heat pumps (ASHPs). However, existing frosting suppression measures may not be fully implementable in practice due to various reasons ... -
A novel time-current-temperature difference (T-I-T) defrosting control method for air source heat pump based on outdoor fan operation characteristics in space heating
( Elsevier , 2025 , Article)In space heating, air source heat pumps (ASHPs) always encounter mal-defrosting incidents, resulting in significant energy waste. To improve the defrosting accuracy of ASHP, this paper proposes a novel Time-Current-Temperature ... -
A novel coefficient of frosting suppression based on the real-time operating characteristics of air source heat pumps
( Elsevier , 2023 , Article)It has been known that for space heating ASHPs, their different configurations and operation may influence their frosting performances. However, there has been no comprehensive coefficient that can be conveniently and ... -
Space heating performance analysis of air source heat pump integrated with image gray recognition-based defrosting controller
( Elsevier , 2024 , Article)In practice, owing to the unreasonable defrosting initiating method of air source heat pumps (ASHPs), mal–defrost occurs frequently, further leading to the increase of building heating energy consumption. In recent years, ... -
A method for sizing air source heat pump considering the joint effect of outdoor air temperature and relative humidity
( Elsevier , 2023 , Article)When operated in a highly humid environment, frost may accumulate on the surface of the outdoor coil in air source heat pump units (ASHPs), leading to a reduction in its output heating capacity. Currently, the existing ... -
Experimental study on the effects of melted frost icing on the operating performances of air source heat pump
( Elsevier , 2024 , Article)Defrosting operation is always used to solve its frosting problem at a high humidity environment for air source heat pump units (ASHPs), and at the end of defrosting operation, the residual melted frost may exist on the ... -
Determination of the defrosting duration ratio for defrosting performance evaluation of air source heat pump
( Elsevier , 2024 , Article)Defrosting performance evaluation is an important aspect for pre-delivery inspection of air source heat pumps (ASHPs). According to GB/T 25127-2020 and ANSI/AHRI 550/590–2023, defrosting duration ratio (α) should not exceed ... -
A prediction model of the optimal defrosting initiating time for the air source heat pumps with different configurations and operations
( Elsevier , 2025 , Article)Frosting is a critical challenge that affects the energy efficiency of air source heat pumps (ASHPs). Defrosting periodically is the most widely used method to solve this problem. However, the rate of frosting varies ... -
A modelling study on the frosting characteristics of a novel dual-fan outdoor coil in an Air Source Heat Pump unit
( Elsevier , 2023 , Article)Uneven frosting along the airflow direction in a traditional outdoor coil in air source heat pumps (ASHPs) was inevitable due to a fixed one-way outdoor airflow direction, causing a rapid deterioration in heating performances ... -
A novel variable speed ASHP frosting suppression operation method based on the frosting suppression performance map
( Elsevier , 2023 , Article)For variable speed (VS) space heating air source heat pump (ASHP) unit, its different operation speed combinations may significantly affect the frosting suppression and heating performances. However, currently there is no ... -
Piezoelectric Properties of Biopolymers
( Springer Nature , 2023 , Book chapter)Biopolymers with piezoelectric properties are widely attractive nowadays owing to their direct and indirect effects of piezoelectric behavior in addition to biocompatibility and biodegradability. Although a wide range of ... -
A versatile route for the fabrication of micro-patterned polylactic-acid (PLA)-based membranes with tailored morphology via breath figure imprinting
( Royal Society of Chemistry , 2024 , Article)Breath figure imprinting, based on surface instabilities combined with fast polymer evaporation in a humid environment, enables the creation of micro-patterned membranes with tailored pore sizes. Despite being a simple ... -
MoS2-Based Hybrid Piezoelectric Materials
( wiley , 2024 , Book chapter)The utilization of renewable energy is the primary focus of the scientific world today. However, the large initial cost, space requirements, and low technological upgrades fade its merits, and lead to difficulty in its ... -
Sustainable green packaging based on nanocellulose composites-present and future
( Springer Science and Business Media B.V. , 2023 , Article Review)Healthy and sustainable solutions achieve remarkable interest to guarantee the freshness and quality of food products through packaging. Currently, packaging materials used in the food industries depend highly on non-degradable ... -
Advancements in nanocarbon-based catalysts for enhanced fuel cell performance: a comprehensive review
( Springer , 2024 , Article Review)Fuel cells hold great promise as a clean energy technology, yet challenges such as material compatibility, manufacturing costs, and durability issues, particularly with noble metal-based electrocatalysts like platinum (Pt), ... -
Influence of phase-separated structural morphologies on the piezo and triboelectric properties of polymer composites
( Springer , 2023 , Article Review)Simplified and flexible fabrication methods, high output performance, and extreme flexibility of polymer-based nanocomposites represent versatile designs in self-powering devices for wearable electronics, sensors, and smart ...
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