Mechanical & Industrial Engineering: المرسلات الحديثة
السجلات المعروضة 1 -- 20 من 1499
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A modeling study on developing the condensing-frosting performance maps for a variable speed air source heat pump
( Elsevier , 2022 , Article)For a variable speed (VS) space heating air source heat pump (ASHP) unit, to comprehensive study its frosting suppression and heating performances, a condensing-frosting performance map has been proposed. An experimental ... -
Model predictive control of indoor thermal environment conditioned by a direct expansion air conditioning system
( Springer Nature , 2023 , Article)Temperature and humidity are two important factors that influence both indoor thermal comfort and air quality. Through varying compressor and supply fan speeds of a direct expansion (DX) air conditioning (A/C) unit, the ... -
Frosting-defrosting performance variations of air source heat pumps with the type of refrigerants: R410A and R32 as an example
( Elsevier , 2025 , Article)Refrigerant substitution is an important topic in developing air-source heat pumps (ASHPs). The new refrigerants were selected based on their environmental impact indices, thermodynamic performance, safety, and economy. ... -
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 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 ... -
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 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 ... -
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 ... -
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, ... -
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, ... -
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 ... -
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 ... -
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 ... -
Biomimetic 3D Prototyping of Hierarchically Porous Multilayered Membranes for Enhanced Oil-Water Filtration
( American Chemical Society , 2025 , Article)This study introduces a biomimetic approach to 3D printing multilayered hierarchical porous membranes (MHMs) using Direct Ink Writing (DIW) technology. Fabricated through a fast layer-by-layer printing process with varying ... -
Enhancing energy autonomy of greenhouses with semi-transparent photovoltaic systems through a comparative study of battery storage systems
( Nature Research , 2025 , Article)Effective energy management is crucial in greenhouse farming to ensure efficient operations and optimal crop growth. This study investigates the energy autonomy—defined as the ratio of on-site energy generation to the total ... -
Centrifugal and Solution Blow Spinning Techniques in Tissue Engineering
( Bentham Science Publishers , 2024 , Book chapter)Nanofibers are a necessary source for fibrous materials and other useful applications such as tissue engineering, filtration, safety fabrics, batteries for the production of nanofibers so far. However, due to its low ... -
A Dual Approach to Detecting Iron Ions and Analyzing Water Quality
( Springer Nature , 2025 , Article)This research establishes the foundation for developing an IoT (internet of things)-enabled sensor developed for the rapid and precise detection of Fe ions (Fe+ 3 and Fe+ 2) in drinking water. The investigation incorporates ... -
Optical and structural characterization of SILAR-coated Mn-doped ZnS films for LEDs
( Springer Nature , 2025 , Article)This study explores the structural and optical properties of Zn1-xMnxS thin films, with varying Mn content (x) between 0 and 0.07. These films are meticulously fabricated on glass substrates using the successive ionic layer ...
