Providing renewable cooling in an office building with a Ground–Source heat pump system hybridized with natural ventilation &amp; personal comfort systems

Martins, Nuno R.; Bourne–Webb, Peter J.

doi:10.1016/j.enbuild.2022.111982

Cited by 10 publications

(4 citation statements)

References 76 publications

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“…PMV is recommended to be between −0.5 and 0.5. Indoor air temperature and humidity can affect PMV [23][24][25][26][27][28]. Therefore, both indoor temperature and humidity should be constrained to ensure the thermal comfort of the room, so that the variables are always optimized within the acceptable range.…”

Section: Optimized Setting Of Water Supply Temperaturementioning

confidence: 99%

Research on a Variable Water Supply Temperature Strategy for a Ground-Source Heat Pump System Based on TRNSYS-GENOPT (TRNOPT) Optimization

Cao

Zhou

Wang³

et al. 2023

Sustainability

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An office building located at Jinan equipped with ground-source heat pump (GSHP) system was selected as the research object. The GSHP system model was established using TRNSYS software. With the total energy consumption of the system as the objective function, several control strategies were proposed for the optimization work of water supply temperature at the load side of the heat pump unit. Firstly, a variable water temperature control strategy was adjusted according to the load ratio of the unit. In addition, the TRNSYS-GENOPT (TRNOPT) optimization module in TRNSYS was used to find the optimal water supply temperatures for different load ratios. After simulating and comparing the system’s energy consumption under the three control strategies, we found that the total annual energy consumption under the variable water supply temperature scheme is less than that under the constant water supply temperature scheme by 10,531.41 kWh. The energy saving ratio is about 5.7%. The simulation found that the total annual energy consumption under the optimized water supply temperature based on TRNOPT is lower than that under the variable water supply temperature scheme by 1072.04 kWh, and it is lower than that under the constant water supply temperature scheme by 11,603.45 kWh. The annual energy saving ratio of the system is about 6.3%. It is concluded that the optimized water supply temperature scheme based on TRNOPT has a better energy saving effect than the first two water supply temperature schemes.

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Section: Optimized Setting Of Water Supply Temperaturementioning

confidence: 99%

Research on a Variable Water Supply Temperature Strategy for a Ground-Source Heat Pump System Based on TRNSYS-GENOPT (TRNOPT) Optimization

Cao

Zhou

Wang³

et al. 2023

Sustainability

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“…To enhance reliability and reduce energy consumption in building air conditioning systems, a combined approach leveraging both artificial and natural sources is imperative to maximize benefits for space cooling and heating. Currently, the integration of artificial cooling and heating sources with natural ventilation [29,30] and solar energy utilization [31,32] has been extensively adopted, yielding significant economic and environmental advantages. While much attention has been given to utilizing deep soil directly for space cooling, the integration of artificial and natural sources remains as the focus of research.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Application Analysis of a Novel Full Fresh Air System Using Only Geothermal Energy for Space Cooling and Dehumidification

Han,

Li,

et al. 2024

Buildings

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To effectively reduce building energy consumption, a novel full fresh air system with a heat source tower (HST) and a borehole heat exchanger (BHE) was proposed for space cooling and dehumidification in this paper. The cooling system only adopts geothermal energy to produce dry and cold fresh air for space cooling and dehumidification through the BHE and HST, which has the advantage of non-condensate water compared to BHE systems integrated with a fan coil or chilled beam. Based on the established mathematical model of the cooling system, this paper analyzed the system characteristics, feasibility, operation strategy, energy performance, and cost-effectiveness of the proposed model in detail. The results show that the mathematical model has less than 10% error in estimating the system performance compared to the practical HST−BHE experimental set up. Under the specific boundary conditions, the cooling and dehumidification capacity of this system increases with the decrease in the air temperature, air moisture content, and inlet water temperature of the HST. The optimal cooling capacity and the system COP can be achieved when the air–water flow ratio is at 4:3. A case study was conducted in a residential building in Shenyang with an area of about 1800 m2. It was found that this system can fully meet the cooling and dehumidification demand in such a residential building. The operation strategy of the cooling system can be optimized by adjusting the air–water flow ratio from 4:3 to 3:2 during the early cooling season (7 June–1 July) and end cooling season (3 August–1 September). As a result, the average COP of the cooling system during the whole cooling season can be improved from 6.1 to 8.7. Compared with the air source heat pump (ASHP) and the ground source heat pump (GSHP) for space cooling, the proposed cooling system can achieve an energy saving rate of 123% and 26%, respectively. Considering that the BHE of the GSHP can be part of the proposed HST−BHE cooling system, the integration of the HST and GHSP for space cooling (and heating) is strongly recommended in actual applications.

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“…Такой вид вентиляции требует наименьших капиталовложений и эксплуатационных затрат, но имеет существенные недостатки: вытяжной воздух выбрасывается наружу без рекуперации теплоты, иначе говоря теплота вытяжного воздуха не используется. Между тем, рекуперация теплоты в системах вентиляции является классическим энергосберегающим решением [2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionunclassified

“…Целью данной статьи является: анализ существующего опыта и схем рекуперации теплоты вытяжного воздуха для жилых зданий, разработка новой схемы с учетом особенностей многоэтажных домов с теплым чердаком, и определение потенциала теплоты вытяжного воздуха на примере реального -DE202006005469. Water preheating device for low-energy home, uses heat exchanger receiving heat from exhausted ventilation air and additional heat exchanger that is part of building heating system (Устройство предварительного нагрева воды для дома с низким энергопотреблением, использующее теплообменник, получающий тепло от вытяжного вентиляционного воздуха, и дополнительный теплообменник, входящий в состав системы отопления здания) [8]. В данной схеме теплота вытяжного воздуха используется для системы нагрева горячей воды по двухступенчатой схеме.…”

Section: Introductionunclassified

Using exhaust air heat for residential buildings with warm attics

Zyryanov,

Tarasova,

Chernenkov

et al. 2023

jour

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In Russia, residential buildings with warm attics and natural exhaust ventilation are common. Thus, the use of the exhaust air heat has a great potential in terms of energy efficiency. The aim of the study is to analyze existing experiences and exhaust air heat recovery for residential buildings, to develop an optimal circuitry taking into account the characteristics of multi-story buildings with warm attics, as well as to calculate the potential of exhaust air heat on the example of a real facility. The authors analyzed the existing exhaust air heat recovery circuitry for residential buildings, introduced the results of theoretical and practical calculations about heating load for hot water supply by means of exhaust air heat recovery in apartment buildings. The theoretical value for hot water heating load by means of exhaust air heat recovery comprises 45.6%. The measurements of the exhaust air in a residential building proved its sufficiency to provide up to 75% of the average hourly heat load for hot water supply. The suggested heat recovery circuitry for buildings with warm attics can contribute to comprehensive measures for reducing energy consumption and improving ventilation.

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Providing renewable cooling in an office building with a Ground–Source heat pump system hybridized with natural ventilation & personal comfort systems

Cited by 10 publications

References 76 publications

Research on a Variable Water Supply Temperature Strategy for a Ground-Source Heat Pump System Based on TRNSYS-GENOPT (TRNOPT) Optimization

Research on a Variable Water Supply Temperature Strategy for a Ground-Source Heat Pump System Based on TRNSYS-GENOPT (TRNOPT) Optimization

Characteristics and Application Analysis of a Novel Full Fresh Air System Using Only Geothermal Energy for Space Cooling and Dehumidification

Using exhaust air heat for residential buildings with warm attics

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