A study on a ventilation stack integrated with a light pipe

Taengchum, Thanyalak; Chirarattananon, Surapong; Exell, R.H.B.; Kubaha, Kuskana; Chaiwiwatworakul, Pipat

doi:10.1016/j.applthermaleng.2012.04.045

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…This system can be realized without relying on a mechanical driving force. Taengchum et al [37] designed a light pipe integrated with a solar-heated ventilation stack that can be used for night ventilation and designed a method that can be used to design a system to achieve the required ventilation rate, transmit a given luminous flux, and evaluate the cost-effectiveness of the configuration. This system needs to use a hot water pump as the circulating power.…”

Section: Light Pipes Combined With the Ventilation Systemmentioning

confidence: 99%

Integrated Systems of Light Pipes in Buildings: A State-of-the-Art Review

Wu,

Jin,

Liu

et al. 2024

Buildings

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Artificial lighting comprises nearly one-third of the total electrical load of buildings, resulting in significant carbon emissions. Reducing the carbon emissions caused by artificial lighting is one of the ways to achieve low-carbon buildings. To meet the demand for high-efficiency, energy-saving, and comfortable lighting, light pipes are increasingly used in buildings. This paper reviews the research and development of light pipes and integrated technology. Sky conditions as a dynamic factor always affect the performance of light pipes. The combination of light pipes and an artificial lighting system can effectively solve this problem. A light pipe can be integrated with a ventilation stack to achieve the ventilation and cooling or heating of a building. A lighting-heating coupled light guide can improve the energy efficiency and sustainability in buildings, such as where antimony tin oxide nanofluid is introduced to absorb additional heat and then provide domestic hot water. The application of a photocatalyst to light pipes can realize air purification and self-cleaning. The use of light pipes does not consume electricity and can reduce the time spent using artificial lighting, thus allowing for power savings. From a whole life cycle perspective, the use of light pipes can be a balance of cost and benefit. In conclusion, such information could be useful for engineers, researchers, and designers to assess the suitability of applying integrated light pipes in different building types and examine the potential of energy and cost savings.

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Section: Light Pipes Combined With the Ventilation Systemmentioning

confidence: 99%

Integrated Systems of Light Pipes in Buildings: A State-of-the-Art Review

Wu,

Jin,

Liu

et al. 2024

Buildings

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“…Computer fluid dynamic simulations aimed at the light pipe thermal profiles were analyzed [27][28][29][30]. The simulations and experimental studies were carried out for integrated daylight-ventilation pipes [31][32][33]. Energy of solar radiation absorbed into the light pipe was specified for the EnergyPlus software simulations [34].…”

Section: Thermal Evaluations Of Light Pipesmentioning

confidence: 99%

Thermal testing of the light pipe prototype

2019

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A light pipe prototype with a concentrating mirror parabolic head was tested for temperature profiles. The purpose of the testing was to find maximal temperature and estimate potential problems for overheating in the position of the pipe installation into roof structures. Infrared thermography monitoring of the light pipe prototype and temperature measurements give overview about the light pipe system temperature distribution. It was proven that the light pipe head temperature was increased for more than 100°C in thermally insulated structure under intensive infrared radiation.

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“…The program was used to generate some interesting results that included results from the simulation of the transmission of daylight through straight pipes, and bending pipes. A combination of the light pipe and stack ventilation with solar water heater had been studied in reference [15]. The light pipe in the experiment was a rectangular light pipe with cross section area 0.0625 m 2 and air duct cross-section area 0.023 m 2 .…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Attic Heat Gain Reduction and Indoor Illuminance Using a Light-Vent Pipe

Sungsoontorn¹,

Nonthiworawong²,

Rattanadecho³

et al. 2019

IJHT

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This research aims to investigate the potential of the light/ vent pipe, which is designed and integrated into the shed roof of the test house. The roof angle is 30 degrees. Two configurations of Light Vent Pipe (LVP) and Vent Pipe (VP) were manufactured by the aluminum sheet with silver surface treatment. Each pipe has 1.20 m of length and 15 cm in diameter. The LVP has a translucent flat cover with 15 cm of diameter. The results show that the LVP induced the natural airflow rate at about 1.8-5.4 m 3 /h and corresponded to the number of air change between 1-4 Air Change per Hour (ACH). The heat gain through the ceiling of LVP was reduced by 5 W/m 2 at the percentage of heat gain reduction of 8-32%. The LVP provides indoor illuminance for about 50-150 Lx. The results showed reasonable agreements with experimental values of air velocity and corresponding to volume airflow rate ACH and heat gain reduction in the building.

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A study on a ventilation stack integrated with a light pipe

Cited by 13 publications

References 18 publications

Integrated Systems of Light Pipes in Buildings: A State-of-the-Art Review

Integrated Systems of Light Pipes in Buildings: A State-of-the-Art Review

Thermal testing of the light pipe prototype

Experimental Investigation of Attic Heat Gain Reduction and Indoor Illuminance Using a Light-Vent Pipe

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