Airtightness of electrical, mechanical and architectural components in South Korean apartment buildings using the fan pressurization and tracer gas method

Hong, Goopyo; Kim, Daeung Danny

doi:10.1016/j.buildenv.2018.01.024

Cited by 20 publications

(12 citation statements)

References 40 publications

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“…In accordance with the authors, 13,28,29 the relationship between the pressure difference between the interior and exterior of the cabin and the infiltration or exfiltration air flow rate produced by the ventilation system and cabin clearances can be modeled using the following power function: where Q is the infiltration or exfiltration air flow rate (m 3 /s), m is the infiltration coefficient (m 3 /(s Pa n )), △ P is the pressure difference (Pa) and n is the flow exponent (-).…”

Section: Experimental Equipment and Methodssupporting

confidence: 62%

“…The results showed that the main sources of air infiltration included the juncture of the ceiling/floor and external walls, the juncture of the separation walls and external walls, the chimney and ventilating ducts, and the door and window peripheries. Hong and Kim 13 used fan pressurization tests and the tracer gas method to measure the airtightness and infiltration ventilation volume of various mechanical, electrical and architectural components in newly built apartment buildings in Korea. The results revealed that the ACH 50 value fell from 1.6∼2.7 h −1 in the original as-installed condition to 0.7∼1.0 h −1 when the components were properly sealed.…”

Section: Introductionmentioning

confidence: 99%

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An experimental method for evaluating vehicle cabin airtightness and ventilation performance

Chang

Sheu

Huang

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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An experimental method is proposed for evaluating the airtightness of a vehicle cabin and the ventilation effects of three components of the vehicle ventilation system. The measurement results are used to derive a theoretical equation to predict the total air infiltration rate of the cabin as a function of the pressure difference between the cabin interior and exterior, respectively. The validity of the predictive equation is demonstrated by means of fan pressurization experiments performed with the vehicle air-conditioning system set in the fresh air mode. It is shown that the prediction results for the total ventilation rate deviate from the experimental results by less than 10%. The infiltration ventilation effect of natural diffusion in the vehicle cabin is measured using the CO2 tracer gas method. The air exchange rate (ACH) of the cabin is found to be 0.816 in the recirculation air mode and 3.554 in the fresh air mode.

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Section: Experimental Equipment and Methodssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

An experimental method for evaluating vehicle cabin airtightness and ventilation performance

Chang

Sheu

Huang

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Point 2 can create artificial conditions which may affect the measurement of infiltration and are not conducive to actual field measurements. 31 Therefore, Point 1 is used to calculate the ACH to validate the result.…”

Section: Methodsmentioning

confidence: 99%

Experimental study on tracer gas method for building infiltration rate measurement

Men

Wang

Zou

2020

Building Services Engineering Research and Technology

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The use of occupant-exhaled CO2 as the tracer gas enables the actual indoor infiltration rate to be measured, but the number and location of measuring points have a great impact on the accuracy of the results. This paper compares the experimental results from two tracer gas measurement techniques, decay with SF6 and constant injection with CO2 (exhaled by occupant). The results show a deviation of –9.0 to 7.4% between these two methods. This paper compares the result of this study with previous ones, and it confirmed that the CO2 method is an effective technique to calculate the infiltration rate in a room with a certain air volume when one measuring point is provided, and this is more accurate with good mixing of the indoor air. The impact of the measurement duration and distribution of indoor air on the measurement accuracy are also analysed. It is found that an extended monitoring period can reduce the impact of indoor air distribution. In actual measurements in residential building, it is recommended to select the data after occupants have been in the room for half an hour and to take measurements over 1 h after that. Practical application: Accurate air change per hour (ACH) is beneficial to the study of building energy consumption and indoor air quality. This paper explores the effectiveness of CO2 method, which provides useful reference for the large sample measurements of infiltration rates in residential buildings.

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“…Thus, a reduction in building energy consumption can lead to a reduction in CO 2 emissions. According to previous studies, energy savings can be achieved by applying appropriate thermal insulation to building envelopes and the use of advanced mechanical systems [3][4][5][6][7]. As building occupants spend more time in an indoor environment, the importance of the selection of proper mechanical systems has become a main concern for building stakeholders regarding thermal comfort and energy conservation [8].…”

Section: Introductionmentioning

confidence: 99%

Heating Performance Analysis of an Air-to-Water Heat Pump Using Underground Air for Greenhouse Farming

2020

Self Cite

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As one of the main businesses in Jeju-do in South Korea, specialized local products are grown in greenhouses. For greenhouse farming, it is preferable to use geothermal heat pump systems for energy conservation because of the stable temperature of the ground. In the same manner, heat pumps using underground air is recommended for greenhouse farming since underground air can easily be obtained from porous volcanic rocks in Jeju-do. However, direct usage of the underground air is not feasible for planting in the greenhouse or livestock care because the underground air is relatively humid and its temperature is low. For the present study, the heating performance of an air-to-water heat pump which used underground air as a heat source for greenhouse farming during the winter was assessed through measurements. In addition, the economic impact of the air-to-water heat pump (AWHP) was compared with a conventional air heater. According to the results, an AWHP can save more than 70% of the total heating costs compared with a conventional air heater. In sum, the utilization of the air-to-water heat pump using underground air can have a positive impact on reducing energy consumption as well as provide direct economic benefits.

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Airtightness of electrical, mechanical and architectural components in South Korean apartment buildings using the fan pressurization and tracer gas method

Cited by 20 publications

References 40 publications

An experimental method for evaluating vehicle cabin airtightness and ventilation performance

An experimental method for evaluating vehicle cabin airtightness and ventilation performance

Experimental study on tracer gas method for building infiltration rate measurement

Heating Performance Analysis of an Air-to-Water Heat Pump Using Underground Air for Greenhouse Farming

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