Comprehensive study of the impacts of surrounding structures on the aero-dynamic performance and flow characteristics of an outdoor unit of split-type air conditioner

Mehryan, S.A.M.; Kashkooli, Farshad Moradi; Soltani, M.

doi:10.1007/s12273-017-0398-4

Cited by 14 publications

(8 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…elements on the simulation results. The appropriate number of elements is chosen by a trade-off between the cost of computational resources and the results of numerical solution (Soltani et al, 2019;Mehryan et al, 2018;Zargar et al, 2016). When the finer mesh does not change the numerical results significantly, the refined mesh is considered as suitable mesh (Soltani et al, 2019(Soltani et al, , 2018.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Image-based spatio-temporal model of drug delivery in a heterogeneous vasculature of a solid tumor — Computational approach

Kashkooli

Soltani

Rezaeian

et al. 2019

Microvascular Research

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Image-based spatio-temporal model of drug delivery in a heterogeneous vasculature of a solid tumor — Computational approach

Kashkooli

Soltani

Rezaeian

et al. 2019

Microvascular Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is possible to predict the natural ventilation airflows inside and around wind towers and also indoor airflows with this approach. The three-dimensional Navier-Stokes equations and continuity equation are solved simultaneously with the turbulence model to simulate the airflow field [50][51][52]. For boundary layer calculations, the standard wall function is used.…”

Section: Solver and Boundary Conditionsmentioning

confidence: 99%

“…The pressure-velocity coupling is handled by the Semi-Implicit Method for Pressure-Linked Equations (SIMPLE) algorithm. For all equations, the convergence criteria require that the residuals decline to 10 −6 , and when the difference of air mass flow rates between inlet and outlet is lower than 0.1% (due to mass conservation), then the calculation is terminated [51,52]. Table 2 shows major assumptions used in the CFD simulation containing model description, operating conditions, materials and boundary conditions.…”

Section: Solver and Boundary Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Airflow Patterns in a New Design of Wind Tower with a Wetted Surface

et al. 2018

View full text Add to dashboard Cite

Abstract:Passive cooling systems, such as wind towers, can help to reduce energy consumption in buildings and at the same time reduce greenhouse gas (GHG) emissions. Wind towers can naturally ventilate buildings and also can create enhanced thermal comfort for occupants during the warm months. This study proposes a modern wind tower design with a moistened pad. The new design includes a fixed column, a rotating and movable head, an air opening with a screen, and two windows at the end of the column. The wind tower can be installed on roof-tops to take advantage of ambient airflow. The wind tower's head can be controlled manually or automatically to capture optimum wind velocity based on desired thermal condition. To maximize its performance, a small pump was considered to circulate and spray water on an evaporative cooling pad. A computational fluid dynamics (CFD) simulation of airflow around and inside the proposed wind tower is conducted to analyze the ventilation performance of this new design of wind tower. Thereby, the velocity, total pressure, and pressure coefficient distributions around and within the wind tower for different wind velocities are examined. The simulation results illustrate that the new wind tower design with a moistened pad can be a reasonable solution to improve naturally the thermal comfort of buildings in hot and dry climates.

show abstract

“…It turns out that modern wind tower designs [17] with a moistened pad provides a large space for airflow inside the column and thus make it possible to increase efficiency at higher wind velocities. Furthermore, numerical simulations make it possible to investigate the influence of structures, such as the exhaust grille, deflecting-ring, and heat exchanger, on the obtained characteristics of the airflow passing through the air conditioner [18]. In addition, CFD analysis is used: to assess the capacity for microbial decontamination of indoor air [19]; to investigate the effect of the position of the air cleaner on the dispersion and removal of particles in an indoor environment [20] and to determine the optimal installation position of the forced air duct during drilling operation [21].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Air Cooling System Using Adjoint Solver Technique

Czerwiński

Wołoszyn

2021

Energies

View full text Add to dashboard Cite

Air cooling systems are currently the most popular and least expensive solutions to maintain a safe temperature in electronic devices. Heat sinks have been widely used in this area, allowing for an increase in the effective heat transfer surface area. The main objective of this study was to optimise the shape of the heat sink geometric model using the Adjoint Solver technique. The optimised shape in the context of minimal temperature value behind the heat sink is proposed. The effect of radiation and trapezoidal fin shape on the maximum temperature in the cooling system is also investigated. Simulation studies were performed in Ansys Fluent software using the Reynolds—averaged Navier–Stokes technique. As a result of the simulation, it turned out that not taking into account the radiation leads to an overestimation of temperatures in the system—even by 14 ∘C. It was found that as the angle and height of the fins increases, the temperature value behind the heat sink decreases and the heat source temperature increases. The best design in the context of minimal temperature value behind the heat sink from all analysed cases is obtained for heat sink with deformed fins according to iteration 14. The temperature reduction behind the heat sink by as much as 25 ∘C, with minor changes in heat source temperature, has been achieved.

show abstract

Comprehensive study of the impacts of surrounding structures on the aero-dynamic performance and flow characteristics of an outdoor unit of split-type air conditioner

Cited by 14 publications

References 39 publications

Image-based spatio-temporal model of drug delivery in a heterogeneous vasculature of a solid tumor — Computational approach

Image-based spatio-temporal model of drug delivery in a heterogeneous vasculature of a solid tumor — Computational approach

Investigation of Airflow Patterns in a New Design of Wind Tower with a Wetted Surface

Optimization of Air Cooling System Using Adjoint Solver Technique

Contact Info

Product

Resources

About