Renewable energy solutions for building cooling, heating and power system installed in an institutional building: Case study in southern Spain

Rosiek, Sabina; Batlles, F.J.

doi:10.1016/j.rser.2013.05.068

Cited by 62 publications

(30 citation statements)

References 39 publications

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“…Over the last two decades, significant efforts have been made on the development and application of various low energy technologies to promote building energy efficiency [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

158

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Nano-enhanced phase change materials (PCMs) have attracted increasing attention to address one of the key barriers (i.e. low thermal conductivity) to the wide adoption of PCMs in many industrial applications. This paper discusses the generic problem and key issues associated with appropriately using this new class of materials in buildings for effective thermal management and improved energy performance. An overview on major recent development and application of nano-enhanced PCMs as thermal energy storage media is provided. A case study based on a PCM ceiling ventilation system integrated with solar photovoltaic thermal (PVT) collectors is then performed to evaluate the potential benefits due to the dispersion of copper nanoparticles into the PCM base fluid of RT24. The results showed that this nano-enhanced PCM has higher melting and solidification rates than that of the pure PCM. Compared to the use of the pure PCM, 8.3% more heat was charged in and 25.1% more heat was discharged from the nano-enhanced PCM under the three winter test days. More research is needed to understand the fundamental mechanisms behind the PCM thermal conductivity enhancement through the dispersion of nanometer-sized materials and to investigate how these mechanisms drive building performance enhancement. Abstract: Nano-enhanced phase change materials (PCMs) have attracted increasing attention to address one of the key barriers (i.e. low thermal conductivity) to the wide adoption of PCMs in many industrial applications. This paper discusses the generic problem and key issues associated with appropriately using this new class of materials in buildings for effective thermal management and improved energy performance. An overview on major recent development and application of nano-enhanced PCMs as thermal energy storage media is provided. A case study based on a PCM ceiling ventilation system integrated with solar photovoltaic thermal (PVT) collectors is then performed to evaluate the potential benefits due to the dispersion of copper nanoparticles into the PCM base fluid of RT24. The results showed that this nano-enhanced PCM has higher melting and solidification rates than that of the pure PCM. Compared to the use of the pure PCM, 8.3% more heat was charged in and 25.1% more heat was discharged from the nano-enhanced PCM under the three winter test days. More research is needed to understand the fundamental mechanisms behind the PCM thermal conductivity enhancement through the dispersion of nanometer-sized materials and to investigate how these mechanisms drive building performance enhancement.

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“…Over the last two decades, significant efforts have been made on the development and application of various low energy technologies to promote building energy efficiency [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

158

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“…Thus, the building can provide both electricity and thermal power (either heating or cooling). Previous works contain detailed descriptions of the building's components [30] and its control system [31].…”

Section: Test-bed Plant Descriptionmentioning

confidence: 99%

Heterogeneous resource management in energy hubs with self-consumption: Contributions and application example

et al. 2018

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The energy hub concept and modeling methodology are widely employed tools for solving resource conversion and storage scheduling problems. For instance, industrial clusters might benefit from determining the suitable time to operate their facilities and to sell electricity to the public power grid, according to legal, economic or environmental factors. In this paper, novel elements are introduced in order to more accurately represent real plants and to reduce the amount of decision variables. The major innovation is to consider devices consuming a resource which is not related to the quantity of output produced, by attaching binary decision variables to certain energy hub outputs. Secondly, a path vector is defined to take into account the flows of resources within the system instead of employing a variable for each branch between the components. The third innovation consists of an additional vector to express the amount of output resources sold from the energy hub, including constraints for those resources which are exported and imported through the same medium. An extended energy hub model is first proposed and then applied to a real plant example, including multiple and heterogeneous resources and performing a comparison between days with different demands, weather conditions and electricity prices. The results obtained in the selected scenarios demonstrate a logical operation scheduling, and therefore validate the proposed approach.

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“…Moreover, the solar energy is fully utilized by using two tanks during the heating season. 4 International Journal of Photoenergy Furthermore, to maximize solar energy absorption and reduce heat loss, two 10 m 3 cylindrical tanks were used as cooling storage. These tanks can store an hour of cooling energy generated by the absorption chiller.…”

Section: General Concept Of Systemmentioning

confidence: 99%

“…The solar energy systems use less grid electricity than the heat pump systems. Therefore, based on the potential energy-saving effect, a solar heating and cooling system (SHCS) represents the most desirable option for the building sector [3,4].…”

Section: Introductionmentioning

confidence: 99%

A Solar Heating and Cooling System in a Nearly Zero-Energy Building: A Case Study in China

Sun

Zhao

et al. 2017

International Journal of Photoenergy

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The building sector accounts for more than 40% of the global energy consumption. This consumption may be lowered by reducing building energy requirements and using renewable energy in building energy supply systems. Therefore, a nearly zero-energy building, incorporating a solar heating and cooling system, was designed and built in Beijing, China. The system included a 35.17 kW cooling (10-RT) absorption chiller, an evacuated tube solar collector with an aperture area of 320.6 m 2 , two hot-water storage tanks (with capacities of 10 m 3 and 30 m 3 , respectively), two cold-water storage tanks (both with a capacity of 10 m 3 ), and a 281 kW cooling tower. Heat pump systems were used as a backup. At a value of 25.2%, the obtained solar fraction associated with the cooling load was close to the design target of 30%. In addition, the daily solar collector efficiency and the chiller coefficient of performance (COP) varied from 0.327 to 0.507 and 0.49 to 0.70, respectively.

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Renewable energy solutions for building cooling, heating and power system installed in an institutional building: Case study in southern Spain

Cited by 62 publications

References 39 publications

Nano-enhanced phase change materials for improved building performance

Nano-enhanced phase change materials for improved building performance

Heterogeneous resource management in energy hubs with self-consumption: Contributions and application example

A Solar Heating and Cooling System in a Nearly Zero-Energy Building: A Case Study in China

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