Numerical Investigation of Thermal Performance of Micro-Pin Fin with Different Arrangements

Jalil, Jalal M.; Reja, Ahmed Hameed; Hadi, Amro M.

doi:10.1088/1757-899x/765/1/012037

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…The potential of Microchannel Heat Sink (MCHS) to provide high heat flux cooling must be fully realized through the optimization of microchannel design. Many studies [9,10] have been done on this topic to optimize the micro-channel design for optimal heat transfer performance in small areas. For this reason, it is widely known that microchannel cooling technology, which operates at a high heat transfer coefficient within a small space, offers several benefits to thermal-fluid systems.…”

Section: Introductionmentioning

confidence: 99%

The influence of micro channel on the performance of low concentrator parabolic collector systems with phase change material

Hamdi,

Jalil,

Reja

2024

ETJ

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A new receiver and reflector design was used in the parabolic solar concentrator • The reflector focuses solar radiation on two sides • Tracking maintained the parabolic collector's perpendicular sun alignment • The maximum energy storage period was 3 hours Increasing global economic development leads to a continuous increase in energy demand, considering the limited conventional resources of energy as well as the impact on the environment associated with its use. The primary disadvantage of solar energy is that it is only accessible during the day. Thermal energy storage systems can overlook this flaw since they can store energy throughout the day for use at night. This paper presents a new cooling technique for low-concentration parabolic collectors with microchannel and Phase Change Material (PCM). A test model consisting of a parabolic concentrator was designed and fabricated to test the parabolic concentrator with and without PCM in Baghdad city during January, March, and July. The solar receiver is an essential component of a solar-powered system and was manufactured from Aluminum metal with 44 microchannels (0.3 m in length, 0.02 m in width, and 0.009 m in height), where the receiver consisted of four rows of microchannels, each row consisting of 11 channels is constructed with velocity and temperature measurement facilities to achieve the experimental results. The results show that the PCM will store the energy roughly three hours after sunset at a flow rate of 0.009339 kg/s. Also, the result indicated that the twoaxis tracking system would increase thermal efficiency.

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Section: Introductionmentioning

confidence: 99%

The influence of micro channel on the performance of low concentrator parabolic collector systems with phase change material

Hamdi,

Jalil,

Reja

2024

ETJ

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“…Besides, it decreases in the plenum thickness, pitch and inlet air temperature. Jalil et al [7] analyzed numerically micro pin fins impact on the performance of heat transfer. As the equations of Navier-Stokes were solved by 3-D turbulent forced convection and steady-state.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Window Solar Air Collector with Moveable Absorber Plates

Dawood¹,

Jalil²,

Ahmed³

2022

ETJ

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 A new novel window with 7 movable absorber plates with different opening angles.  Best thermal performance and minimum of sunlight were obtained at angle 0 .  Lower thermal performance and maximum of sunlight were obtained at angle 90 .  A flexibility between hot air and sunlight requirements for angles between 0 and 90 .Window solar air collector is an imperative instrument for heating residential buildings in cold regions. This paper presents a numerical investigation of the thermal performance of a window solar air collector with seven moveable absorber plates. With glass on the front and back sides of the collector. By the use of FORTRAN 90; The three-dimensional steady-state turbulent forced convection method was used to solve the Navier-Stokes equations. The seven plates opened and closed at different angles in unison manually by a specific mechanical mechanism. The effect of changing the plate angles has been tested, alongside the effect of airflow rates and the intensity of solar radiation. Numerical results illustrate that air temperature difference is higher at vertical plates position (angle 0 ) compared to that at angle 90. In contrast, flexibility between sunlight penetrating the room and hot air from the collector will be gained when the plates are set on angle 90. Results indicate that the thermal performance was improved by 67% when the plates were set at angle 0. Maximum thermal efficiency for angle 0 was 72% at a mass flow rate of 0.0298 kg/s. However, maximum thermal efficiency was 51% at mass flow rate 0.0298 for angle 90°.

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Numerical Investigation of Thermal Performance of Micro-Pin Fin with Different Arrangements

Cited by 2 publications

References 15 publications

The influence of micro channel on the performance of low concentrator parabolic collector systems with phase change material

The influence of micro channel on the performance of low concentrator parabolic collector systems with phase change material

Numerical Investigation of a Window Solar Air Collector with Moveable Absorber Plates

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