Performance evaluation of Earth to Air Heat Exchange (EAHE) used for indoor ventilation during winter in severe cold regions

Li, Hui; Ni, Long; Liu, Guang; Yang, Yao

doi:10.1016/j.applthermaleng.2019.114111

Cited by 42 publications

(10 citation statements)

References 27 publications

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“…The results show that the EAHE system can provide an average preheating potential of 14 • C for the heating condition, and the maximum COP is up to 16.3. However, the study also pointed out that the underground soil temperature slightly decreases after a long-period operation of the heating mode, and seasonal alternate operation between the heating and cooling modes helps to maintain a stable underground soil temperature [31]. This means that the EAHE system has good applicability for the climate of hot-summer and cold-winter.…”

Section: Introductionmentioning

confidence: 94%

“…For the heating-dominated climate, the EAHE can preheat the ventilation airflow within the buried pipes. Li et al [31][32][33] conducted a series of experimental and numerical studies on the thermal performance of the EAHE system for a severe cold climate. The results show that the EAHE system can provide an average preheating potential of 14 • C for the heating condition, and the maximum COP is up to 16.3.…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Earth-to-Air Heat Exchanger to Pre-Cool/Heat Ventilation Air and Its Annual Energy Performance Evaluation: A Case Study

et al. 2020

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An earth-to-air heat exchanger (EAHE) system utilizes the low-grade thermal energy of underground soil to warm up and cool down the flowing air within an underground buried pipe. Integrating the EAHE system with building ventilation can reduce the energy demand for conditioning ventilation air. The main purposes of this paper are to estimate the year-round energy-saving potential of the EAHE-assisted building ventilation system and provide its design guidelines in a hot-summer and cold-winter climate. A steady-state heat transfer model was proposed to calculate the outlet air temperature of an EAHE and further identify its ability to preheat and precool ventilation air. Influences of depth, length, and diameter of a buried pipe on the year-round thermal performance of the EAHE system were evaluated. The results show that considering the compromise between thermal performance and construction costs of the EAHE system, a depth of 5 m and a length of 80 m are recommended. The EAHE system can provide a mean daily cooling and heating capacity of 19.6 kWh and 19.3 kWh, respectively. Moreover, the utilization of the EAHE system can reduce by 16.0% and 50.1% the energy demand for cooling and heating ventilation air throughout the whole year.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Utilization of Earth-to-Air Heat Exchanger to Pre-Cool/Heat Ventilation Air and Its Annual Energy Performance Evaluation: A Case Study

et al. 2020

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“…However, the existing practices also demonstrates that the vertical-buried pipe EAHE system, as a new type of SG utilization system, has relatively high construction cost due to the lack of mature construction and installation methods [33,34]. Multi-layer horizontal-buried pipes (Modified from [35]); (c) Single inlet and outlet multi-row horizontal-buried pipes (Modified from [36]); (d) U-type vertical-buried pipes (Modified from [37]).…”

Section: Common Utilization Forms Of Sg Technologiesmentioning

confidence: 99%

“…Figure 1. Common utilization forms of EAHE systems: (a) Multi-row horizontal-buried pipes; (b)Multi-layer horizontal-buried pipes (Modified from[35]); (c) Single inlet and outlet multi-row horizontal-buried pipes (Modified from[36]); (d) U-type vertical-buried pipes (Modified from[37]). …”

mentioning

confidence: 99%

Review on shallow geothermal promoting energy efficiency of existing buildings in Europe

Liu

K.Qian

Visscher

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The energy-saving renovation of existing buildings has been attracted sufficient attention to reduce fossil fuels and mitigate global warming in Europe. The shallow geothermal for building cooling and heating, as an environmentally-friendly and cost-effective alternative, has been widely explored to promote energy efficiency of existing buildings. However, few studies conduct the comprehensive overview on the applications, developments, and existing issues of shallow geothermal promoting energy efficiency of existing buildings (SGPEEEB) in Europe. The objective of this paper is to review the current application status and future trends of SGPEEEB in Europe. First, the common utilization forms and classifications of used shallow geothermal technologies are introduced to further clarify the investigated subject. Then, the research and application status of SGPEEEB has also analyzed and discussed. At last, this study proposes the future trends and comments of SGPEEEB in Europe.

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“…In addition, significant COP values were estimated in winter and summer using pipes buried at 2 m depth. As for Li et al [24], an exploratory study on the application of the preheating potential of the EAHE, in very cold regions, was conducted. The analyses showed that in heating mode, the EAHE increased the average temperature by 12.4 °C, giving an average COP of 29.7.…”

Section: Introductionmentioning

confidence: 99%

Effect of geo-climatic conditions and pipe material on heating performance of earth-air heat exchangers

Lekhal

Benzaama

Kindinis³

et al. 2021

Renewable Energy

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Performance evaluation of Earth to Air Heat Exchange (EAHE) used for indoor ventilation during winter in severe cold regions

Cited by 42 publications

References 27 publications

Utilization of Earth-to-Air Heat Exchanger to Pre-Cool/Heat Ventilation Air and Its Annual Energy Performance Evaluation: A Case Study

Utilization of Earth-to-Air Heat Exchanger to Pre-Cool/Heat Ventilation Air and Its Annual Energy Performance Evaluation: A Case Study

Review on shallow geothermal promoting energy efficiency of existing buildings in Europe

Effect of geo-climatic conditions and pipe material on heating performance of earth-air heat exchangers

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