Energy saving effect of air circulation heat storage system using natural energy

Lee, Hak Sung; Ozaki, Akihito; Lee, Myonghyang

doi:10.1016/j.buildenv.2017.08.007

Cited by 21 publications

(13 citation statements)

References 11 publications

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“…14,15 And when PCM is applied onto the double-pipe heat exchanger of liquid flow window, plenty of hot water could be saved. 16 Moreover, Lee H et al 17 indicated that in mechanical ventilation system, using PCM storage for free building cooling can significantly reduce the system's size and increase indoor thermal comfort of buildings. Secondly, it is interesting to note that PCM has also been successfully incorporated with building envelope, including roof, wall, and floor.…”

Section: Introductionmentioning

confidence: 99%

Numerical assessing energy performance for building envelopes with phase change material

Zou

Chen

et al. 2018

Int J Energy Res

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Summary In hot climate, phase change material (PCM) can be incorporated into building envelopes to reduce heat gain through the building envelopes and therefore reduce its cooling demand. In this study, the energy performance of building envelopes integrated with PCM has been explored using a popular dynamic building performance simulation package, EnergyPlus, and the energy saving mechanism of PCM was investigated. The simulation results reflected that PCM could effectively help to reduce the building's annual energy consumption by 20.9% for Guangzhou, China. In addition, for the Guangzhou city, 27°C transition temperature, smaller thermal conductivity of roof, and higher amount of PCM can all help to improve the building's energy performance. Additionally, it is suggested that in real building development/retrofit projects, the selection of PCM needs to be based on both their thermal properties and the local climatic conditions of the building.

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Section: Introductionmentioning

confidence: 99%

Numerical assessing energy performance for building envelopes with phase change material

Zou

Chen

et al. 2018

Int J Energy Res

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“…Building energy demands play an important role in the world's total energy consumption. Japan's buildings account for more than 30% of its energy consumption [1]. The government recently formulated a policy requiring that all new buildings meet Japan's energy efficiency standards by 2020, aiming to increase the ratio of renewable energy for each energy supply by 10% by 2020 through the preferment of solar heat and solar light [1].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Thermal Performance of a Sunspace Attached to a House with a Central Air Conditioning System

Fukuda

Lee

et al. 2018

Sustainability

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In this paper, the thermal performance of a sunspace attached to a house with a central air conditioning system was experimentally investigated. The house with a south-facing sunspace is located in Miyazaki, Japan, where heating is required in winter. In order to reduce the heating energy in winter, the hot air from the attached sunspace is sent to the central air conditioning room, from where it is then distributed and stored throughout the house by way of air circulation. Only when the temperature in the sunspace exceeds 24 • C is the hot air in the sunspace sent to the central air conditioning room. The air circulation between the attached sunspace and central air conditioning room is 500 m 3 /h. The temperature of the attached sunspace and each room were measured. The results showed that a house with a sunspace can save about 12.2% of energy compared to a house without a sunspace.

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“…They verified the accuracy of THERB for HAM by comparing the monitoring and calculation results of a residential building. Lee, H. [38] compared the monitored indoor temperature with the computed results achieved from THERB for HAM. The computed results agreed well with monitored data.…”

Section: Description Of the Double-layer Trombe Wall With A Temperatumentioning

confidence: 99%

“…The simulation results were validated throughout the BESTEST procedure tests in Japan. The software of THERB for HAM is an assessment tool for annual cooling and heating load computation methods base on the law concerning the promotion of housing quality assurance [38]. Ozaki, A.…”

Section: Description Of the Double-layer Trombe Wall With A Temperatumentioning

confidence: 99%

“…Jie et al [37] studied the performance of a photovoltaic Trombe wall (PV-TV) without and with a fan. Results showed that the fan can reduce the PV cell temperature by 1.28 • C and reduce the internal temperature by 0.5 • C. Lee, H. [38] investigated the effect of reducing the sensible heat load by using the software of THERB for HAM. The central air-conditioning system integrated a PCM unit and ventilation layer in the air circulation system.…”

Section: Introductionmentioning

confidence: 99%

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Study of a Double-Layer Trombe Wall Assisted by a Temperature-Controlled DC Fan for Heating Seasons

Fukuda

Kobatake³

et al. 2017

Sustainability

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This paper presents a double-layer Trombe wall assisted by a temperature-controlled direct current (DC) fan. THERB for HAM, a dynamic thermal load calculation software, was used to estimate the heating ability of a double-layer Trombe wall for an office building. We designed a new double-layer Trombe wall that has two ventilated air cavities installed on the south facade of the office building, and a pipe with a temperature-controlled DC fan used to control thermo-circulation. The office building was located in Kitakyushu, Fukuoka, Japan. The temperature of the ventilated air cavity of the double-layer Trombe wall and the indoor temperature were simulated. It was more efficient for the DC fan to start when the ventilated air cavity temperature was 19 • C and the operative temperature of indoor was maintained at 20 • C. The results showed that the double-layer Trombe wall with a temperature-controlled DC fan can reduce yearly heating needs by nearly 0.6 kWh/m 3 and improve the performance of a double-layer Trombe wall up to 5.6% (22.7% in November, 8.56% in December, 1.04% in January, 3.77% in February, and 3.89% in March), compared to the double-layer Trombe wall without an air supply. The ventilated (all day) double-layer Trombe wall performed better than the unventilated double-layer Trombe wall in November, December, February, and March. Thus, the potential of a double-layer Trombe wall can be improved with the assistance of a temperature-controlled DC fan.

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Energy saving effect of air circulation heat storage system using natural energy

Cited by 21 publications

References 11 publications

Numerical assessing energy performance for building envelopes with phase change material

Numerical assessing energy performance for building envelopes with phase change material

Experimental Analysis of the Thermal Performance of a Sunspace Attached to a House with a Central Air Conditioning System

Study of a Double-Layer Trombe Wall Assisted by a Temperature-Controlled DC Fan for Heating Seasons

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