Sizing effects on the energy performance of reversible air-source heat pumps for office buildings

Dongellini, Matteo; Naldi, Claudia; Morini, Gian Luca

doi:10.1016/j.applthermaleng.2016.12.010

Cited by 43 publications

(12 citation statements)

References 13 publications

(26 reference statements)

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“…Previous works [136,137] demonstrate that accurate sizing of the heat pump compared to the building thermal demand is crucial to optimize the energy performance, as well as costs for the user. An oversized system works intermittently for most of the climatic year, and it presents a low COP because it is running far below its nominal capacity.…”

Section: Thermal Output Sizing and Thermal Storagementioning

confidence: 99%

Sustainability of Shallow Geothermal Energy for Building Air-Conditioning

2021

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Geothermal heat pumps have a widespread diffusion as they are able to deliver relatively higher energy output than other systems for building air-conditioning. The exploitation of low-enthalpy geothermal energy, however, presents crucial sustainability issues. This review investigates the primary forms of the environmental impact of geothermal heat pumps and the strategies for their mitigation. As life-cycle analyses shows that the highest impacts arise from installation and operation stages, most optimization studies focus on system thermodynamics, aiming at maximizing the energy performance via the optimization in the design of the different components interacting with the ground and serviced building. There are environmental studies of great relevance that investigate how the climate and ground properties affect the system sustainability and map the most suitable location for geothermal exploitation. Based on this review, ground-source heat pumps are a promising technology for the decarbonization of the building sector. However, a sustainable design of such systems is more complex than conventional air-conditioning systems, and it needs a holistic and multi-disciplinary approach to include the broad environmental boundaries to fully understand the environmental consequences of their operation.

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Section: Thermal Output Sizing and Thermal Storagementioning

confidence: 99%

Sustainability of Shallow Geothermal Energy for Building Air-Conditioning

2021

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“…In the simulation model, the Coefficient Of Performance (COP) and the Energy Efficiency Ratio (EER) of the selected heat pump/chiller devices vary as a function of the occurring operating conditions as defined by the manufacturers. Specifically, COP and EER are calculated as a function of the part load ratio, the ambient temperature and the temperature of the condenser or the evaporator, by following a lookup data approach [57]. The amount of electricity needed for the operation of the heat pump, / , is calculated by the heating or cooling demand, Q̇i n , as:…”

Section: Energy Calculationmentioning

confidence: 99%

Modeling of double skin façades integrating photovoltaic panels and automated roller shades: Analysis of the thermal and electrical performance

Ioannidis

Buonomano

Athienitis

et al. 2017

Energy and Buildings

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A numerical model is developed for simulating a single or multi-story Double Skin Façade integrating Photovoltaics (DSF-PV). The DSF-PV can co-generate solar electricity and heat while it also allows daylight to be transmitted to the interior space. The buoyancy-driven air flow inside the cavity may be assisted by a fan to cool down the photovoltaics while providing natural or hybrid ventilation to adjacent zones. Automated roller shades are also implemented in the model and help regulate heating and cooling loads but also control the daylight levels in the indoor space. A parametric analysis for different control strategies for the airflow within the cavity and the roller shading devices is performed with the purpose to apply the proposed methodology to minimize the heating and cooling demand of the DSF-PV system. In addition, a parametric analysis for different adjacent zones floor areas is performed. The simulations show that a DSF-PV system can supply approximately 120kWh/façade area/year covering the yearly electricity demand of the adjacent office if the floor area is approximately less than 3 times larger than the floor area.

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“…As part of EU directives to increase the energy efficiency within buildings, heat pumps have become a very popular as a source of heating [39,40]. They come in two forms: a ground source heat pump (GSHP) [41,42] or an air source heat pump (ASHP) [43,44]. These both work by extracting low temperature heat from the surrounding land (typically a garden) or air and increasing the temperature through an electric pump and compression system [19].…”

Section: Heat Pumpsmentioning

confidence: 99%

A review on house design with energy saving system in the UK

Xie

Gilmour

Yuan

et al. 2017

Renewable and Sustainable Energy Reviews

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As part of EU incentives, the UK government have set ambitious environmental targets relating to energy consumption including a reduction of carbon emissions of 80% by 2050. The use of various technologies can help meet these targets as well as providing a secure energy source for the UK in the future. This research took the UK as a case study and investigated where reduction measures are most suited to reduce energy consumption. This paper presents a review on the current state-of-the-art on the domestic technology available, in particular solar energy, heat pumps, phase changing materials (PCMs) and micro combined heat and power (micro-CHP) systems, aiming at identifying research and development opportunities for energy saving in these fields. Furthermore, the financial as well as environmental aspects are assessed as these are the two key considerations of typical household. A typical UK house design, including the floor plan, is created through the use of computer aided design (CAD) software. The house design gives a payback period between 8.7 years at best and 11.6 years at worst.

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Sizing effects on the energy performance of reversible air-source heat pumps for office buildings

Cited by 43 publications

References 13 publications

Sustainability of Shallow Geothermal Energy for Building Air-Conditioning

Sustainability of Shallow Geothermal Energy for Building Air-Conditioning

Modeling of double skin façades integrating photovoltaic panels and automated roller shades: Analysis of the thermal and electrical performance

A review on house design with energy saving system in the UK

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