Browsing by Author "Zheng, Jian"
Now showing items 1-15 of 15
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A multivariable control strategy based on fuzzy logic interference rule for a solar-driven, direct air-cooled H2O-LiBr absorption chiller
(Elsevier, 2024-05)
Article
Open AccessThe operation of a solar-driven H2O-LiBr Absorption Chiller (AbC) is subjected to various limitations regarding its ability to satisfy efficiently the required cooling demand while avoiding certain internal conditions, ... -
A new high-performance flat plate solar collector. Numerical modelling and experimental validation
(2024-02-01)
Article
Open AccessA new concept of flat plate solar collector (FPC) has been numerically studied for optimization purposes from an energetic and exergetic points of view. The highly efficient results have been achieved by adding transparent ... -
Application of experimental and numerical methodologies for the development of an absortion heat pump for solar-driven systems
(Universitat Politècnica de Catalunya, 2023-05-11)
Doctoral thesis
Open Access(English) The topics explained in this thesis are organized in different chapters. A summary of the contents is given below: Chapter 2. Details of working pairs and properties with numerical modelling and experimental ... -
Dynamic simulations of an absorption system with different working pairs at chiller and heat pump application
(Purdue University, 2021)
Conference report
Restricted access - publisher's policyThis work describes the dynamic simulation of a direct air-cooled single effect solar-driven absorption system and demonstrates the numerical results of the absorption system with different working pairs. The working pairs ... -
Electrical Conductivity of Concentrated LiBr Ethylene-Glycol and Water ternary system
(Institute of Physics (IOP), 2021)
Conference report
Open AccessLiBr/H2O as working pair in absorption chiller is widely used in the absorption refrigeration system, and the electrical conductivity is used as secondary properties as an empirical relation with temperature and concentration ... -
Energy and exergy analysis of an absorption system with working pairs LiBr-H2O and Carrol-H2O at applications of cooling and heating
(2021-12-01)
Article
Open AccessIn this work, an air-cooled, single effect solar-driven absorption system is being evaluated from the point of view of 1 and 2 thermodynamic principles for two different applications: absorption chiller and heat pump. One ... -
Experimental testing of a solar thermal collector with composite TIM of plastic Honeycomb and silica aerogel polyurethane containers
(International Solar Energy Society, 2022)
Conference report
Restricted access - publisher's policyA new proposal of high performance flat plate solar thermal collector (FPC) based on Transparent Insulation Materials (TIM) combining silica aerogel contained in insulation containers with plastic honeycomb is evaluated ... -
Falling film characteristic numerical modelling and experimental validation
(Begell House, 2023)
Conference report
Restricted access - publisher's policyThis paper presents a study on the falling film characteristics of vertical tubes and inclined plates, focusing on film thickness and wave frequency. A numerical modelling approach was employed using OpenFOAM’s InterFOAM ... -
Mathematical Modeling and Experimental Validation of a Highly Efficient Flat Plate Solar Collector with compound Transparent Insulation Materials including a Silica Layer
(International Society of Exposure Science (ISES), 2021)
Conference report
Restricted access - publisher's policyThe present work consists in the development of a highly efficient solar thermal flat plate solar collector [FPC] with transparent insulation materials [TIM] at high-temperature ranges (¿ at ¿T/G close to 0.1 Km2/W). The ... -
Numerical resolution of heat and mass transfer phenomena : application to the estimation of heat and mass transfer coefficients in absorption processes with falling film
(Universitat Politècnica de Catalunya, 2017-09-13)
Master thesis
Open AccessIn this project, self-build CFD code in C++ is employed to simulate several classical fluid dynamic, heat and mass transfer problems such as Driven Cavity, Deferential Heat Cavity, Square Cylinder problem. Besides, this ... -
Sensitivity Study To An Absorption System Performance Considering Heat And Mass Transfer Enhancements
(Purdue University, 2022)
Conference report
Restricted access - publisher's policyThis work describes the absorption system performance with working pairs LiBr-H2O and Carrol-H2O (Carrol contains LiBr and EG -Ethylene glycol- with a mass ratio at 4.5:1) considering the thermal characteristics enhancement. ... -
Study of the influence of surfactants and surface treatments on the minimum wetting rate of falling films of aqueous LiBr and Carrol solutions
(Elsevier, 2022-09)
Article
Restricted access - publisher's policyThe wettability is one of the critical properties of the falling film type absorber, limiting the wetting area in the absorber, hence the total mass transfer performance. To achieve low values of wetting rate in the ... -
Study on temperature distribution of vertical liquid falling film heat transfer with Al2O3 nanofluid
(Elsevier, 2024-02-15)
Article
Open AccessThis study presents a laminar smooth 2-D theoretical model of the falling liquid film using an in-house code and validated with experimental results. The numerical model considers thermophysical property enhancements with ... -
Surface tension and contact angle measurement of LiBr and Carrol solution
(Technishe Universität Berlin, 2021)
Conference report
Open AccessThe surface tension and contact angle play a relevant role in the heat and mass transfer for the absorption system working pairs. However, LiBr aqueous solution surface tension/contact angle studies are limited and for ... -
Transient model for the development of an air-cooled LiBr-H2O absorption chiller based on heat and mass transfer empirical correlations
(Elsevier, 2020-12)
Article
Open AccessThis work describes transient numerical modeling of a direct air-cooled,single-effect absorption chiller. The model is lumped parametric based on transient mass, momentum, and energy balances, applied to the internal ...
