Numerical Simulation Modeling of a GSHP and WSHP System for an Office Building in the Hot Summer and Cold Winter Region of China: A Case Study in Suzhou

Ma, Wenting; Kim, Moon Keun; Hao, Jian Li

doi:10.3390/su11123282

Cited by 20 publications

(9 citation statements)

References 39 publications

(58 reference statements)

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“…Shifts of the isotherms by 1 K would only take 12.5 years with the measured, average temperature increases of 0.08 K/a in the highly sealed area. When simulating GSHPs, several decades are often covered [52][53][54]. During this period, the groundwater temperatures as input parameters would increase correspondingly more, which would have a positive effect on the heating operation of the system, but a negative effect on the building cooling.…”

Section: Discussionmentioning

confidence: 99%

Detecting Groundwater Temperature Shifts of a Subsurface Urban Heat Island in SE Germany

Schweighofer

Wehrl

Baumgärtel

et al. 2021

Water

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The subsurface beneath cities commonly shows a temperature anomaly, a so-called Subsurface Urban Heat Island (SUHI), due to anthropogenic heat input. This excess heat has multiple effects on groundwater and energy resources, such as groundwater chemistry or the efficiency of geothermal systems, which makes it necessary to investigate the temporal development of a SUHI. For this purpose, temperature profiles of 38 observation wells in the German city of Nuremberg were evaluated from 2015 to 2020 and the measured temperature changes were linked to the surface sealing. The results show that the groundwater temperatures changed between −0.02 K/a and +0.21 K/a, on average by +0.07 K/a during this period. A dependence between the temperature increase and the degree of sealing of the land surface was also observed. In areas with low surface sealing of up to 30% the warming amounts were 0.03 K/a on average, whereas in areas with high sealing of over 60% significantly higher temperature increases of 0.08 K/a on average were found. The results clearly emphasize that the subsurface urban heat island in its current state does not represent a completed process, but that more heat energy continues to enter the subsoil within the city than is the case with near-natural land surfaces.

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Section: Discussionmentioning

confidence: 99%

Detecting Groundwater Temperature Shifts of a Subsurface Urban Heat Island in SE Germany

Schweighofer

Wehrl

Baumgärtel

et al. 2021

Water

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“…More in detail, WSHP systems have more advantages in terms of energy-efficiency, ease of installation, and cost comparing to a ground source cooling and heating system. Considering the high specific heat capacity of water, particularly, water bodies were demonstrated to be a competent heat source and sink for heating and cooling [11,12]. WSHP systems can be classified by the type of water source, such as wastewater, raw water, underground water, and surface water [13].…”

Section: Introductionmentioning

confidence: 99%

Use of an Outdoor Swimming Pool as Seasonal Heat Source in Heat Pump Applications

Emmi¹,

Natali²,

Cesari³

et al. 2021

TI-IJES

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The improvement of energy efficiency in the building sector is one of the most promising actions for achieving the energy and environmental goals of the European Community. The deep retrofit of buildings is obviously the best solution in terms of energy performance result. When the deep retrofit is not allowed or possible, the simple maintenance of the building envelope and plant is usually done to assure the operation over time. This type of intervention could require the installation of new HVAC systems that could include a HP, which nowadays represents one of the key devices for the energy saving and the sustainable development. This work regards the study of the energy performance of a swimming Pool Centre in North-East Italy. The objective of this work is the exploitation of an outdoor swimming pool as a heat source for a HP system. The HP system uses two different heat sources, the air and the water. The final SCOP of the double source HP system has been calculated and compared with an air source HP solution. This analysis has been carried out by means of dynamic energy simulations in TRNSYS environment.

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“…The mitigation of boundary conditions involves less severe working conditions for the HVAC systems, thus producing an extra contribution in terms of active energy efficiency potential, such as, for instance, in the case of active cool roof effects [16]. In particular, air conditioning unit efficiency significantly varies with varying inlet and outlet thermal working conditions [17]. Therefore, the dynamic behavior of different types of systems was highlighted in existing studies [18].…”

Section: Introductionmentioning

confidence: 99%

Combined Effect of Outdoor Microclimate Boundary Conditions on Air Conditioning System’s Efficiency and Building Energy Demand in Net Zero Energy Settlements

2020

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In Europe, near zero energy buildings (NZEBs) represent the new frontier of energy efficiency in the built environment. Shifting the scale from NZEBs to net zero energy (NZE) settlements represents the opportunity to achieve further energy, environmental, and cost benefits, thanks to shared energy management, optimization of renewable energy systems, and microclimate mitigation. In particular, the last aspect takes advantage of the implementation of local microclimate mitigation strategies at a larger scale to improve settlements outdoor environmental conditions and citizens’ wellbeing. Furthermore, this inter-building scale mitigation involves relatively less severe working boundary conditions for buildings, able to both reduce building energy demand and improve HVAC (heating, ventilation, and air conditioning) system’s efficiency. In this study, this potential extra-energy saving, achievable without additional costs, is explored within the framework of a NZE settlement built in Italy thanks to an ongoing Horizon 2020 project. Improved working conditions for the operating air conditioning system and building energy savings thanks to settlement scale opportunities for microclimate mitigation are assessed. Findings show how this effect represents a further non-negligible energy-efficient and environmentally sustainable benefit achievable through the design and construction of NZE settlements. Potential energy savings are up to 24% when considering the double effect of microclimate mitigation.

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Numerical Simulation Modeling of a GSHP and WSHP System for an Office Building in the Hot Summer and Cold Winter Region of China: A Case Study in Suzhou

Cited by 20 publications

References 39 publications

Detecting Groundwater Temperature Shifts of a Subsurface Urban Heat Island in SE Germany

Detecting Groundwater Temperature Shifts of a Subsurface Urban Heat Island in SE Germany

Use of an Outdoor Swimming Pool as Seasonal Heat Source in Heat Pump Applications

Combined Effect of Outdoor Microclimate Boundary Conditions on Air Conditioning System’s Efficiency and Building Energy Demand in Net Zero Energy Settlements

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