A Polygeneration System Based on Desiccant Air Conditioning Coupled with an Electrical Storage

Gesteira, Luis Gabriel; Uche, Javier; Dejo‐Oricain, Natalia

doi:10.3390/su142315784

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…The 100% RES solution (that is, not using an energy balance with the grid and using (or not using) energy storage systems, ESS) has not been included here for economic reasons. Still, the authors have also studied it for an isolated domestic dwelling [54,55]. In these analyses, the polygeneration configuration only includes PVT panels, the RO being the desalination technique but including the desiccant wheel (SDW) as the cooling system.…”

Section: Discussionmentioning

confidence: 99%

A Sustainable Polygeneration System for a Residential Building

et al. 2022

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In line with the decarbonization of the domestic sector to meet the 2050 climate neutrality targets, this paper describes the energy, economic, and environmental analysis of a set of different novel configurations of polygeneration installations to provide electricity, air conditioning, domestic hot water, and desalinated water for a building of 80 dwellings. All arrangements were designed to cover 100% of the five demands required in the building with renewable energy only, from photovoltaic (PV) and photovoltaic-thermal (PVT) panels and biomass backup boilers (BB). Electricity can be sold to or purchased from the grid without electrical storage with batteries. Additional electricity generation with thermoelectric generators (TEG) coupled to the PVTs, and the BB was explicitly analyzed. The choice of electrically or thermally activated technologies (heat pump, HP/single-effect absorption chiller, SEAC for cooling and multi-effect distillation, MED/reverse osmosis, RO for desalination) created four configurations from the basic structure based on solar and biomass sources. Thus, the paper has studied four designs in detail and applied them to three case studies corresponding to different locations in Spain. They were modeled with TRNSYS and included specific models for desalination technologies. Both structures provide important energy and CO2 savings concerning the conventional supply of the building demands. The novel life-cycle analysis approach further increases the lifetime CO2 savings for all configurations as well. The electric option (the combination of HP and RO for cooling and desalting) was, by far, the most attractive solution in terms of liability and lower investment required in the three case studies.

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Section: Discussionmentioning

confidence: 99%

A Sustainable Polygeneration System for a Residential Building

et al. 2022

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“…The order of best integrations in terms of viability remains consistent, as B-C-A-D. While the analysis did not include a 100% RES solution (without the grid-net energy balance and energy storage systems), the authors studied the influence of using or not using batteries for an isolated domestic dwelling in separate analyses [58]. In these cases, the polygeneration only included PVT panels and RO for desalination and the inclusion of a solid desiccant wheel (SDW) to cool the house, which was also thermally activated.…”

Section: Discussionmentioning

confidence: 99%

Renewable Energy Source (RES)-Based Polygeneration Systems for Multi-Family Houses

Uche,

Martínez-Gracia,

Zabalza

et al. 2024

Sustainability

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This research work synthetizes the energy, economic, and environmental aspects of a novel configurational analysis of four polygeneration schemes designed to fulfill the demands of a multi-family building that includes 12 dwellings. The design aims to meet the requirements (water, electricity, heat and cold air) from Renewable Energy Sources (RESs), in particular by selecting photovoltaic and photovoltaic-thermal panels, thermoelectric generators, and biomass as auxiliaries. Electricity is available from the grid, and no electrical storage is planned. Water and cooling may be produced by alternative technologies that configure the polygeneration alternatives. The case study is in Valencia, a coastal Mediterranean city in Spain. The Design Builder Clima estimated demand calculations, and the system performance was modeled in TRNSYS. Desalination was linked by using EES models. Results show that the suggested schemes offer substantial energy and CO2 savings. The innovative life-cycle analysis applied further enhances the cumulative CO2 savings across the four configurations if the impact of the installations is compared with the conventional external supply. The electric option (combining heat pump and reverse osmosis for cooling and desalination) emerged as the most appealing solution due to its reliability, lower investment cost, and environmental impact.

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“…Although water tanks are the most well-known and widely used solution in sensible heat storage [8], it is possible to use phase change materials (PCMs) to store thermal energy. PCMs allow for the storage of large amounts of heat at an almost constant temperature while undergoing phase transition [9].…”

Section: Space Heatingmentioning

confidence: 99%

“…Gesteira et al [9] carried out a study where they assessed a polygeneration system used to provide space heating and cooling, electrical energy, and fresh and hot domestic hot water for a single-family dwelling in Spain. The system is based on photovoltaic-thermal solar collectors.…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental Analysis of a Polygeneration System: Assessment of the Thermal Sub-System

Rodrigues,

Palmero-Marrero,

Soares

et al. 2024

Energies

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In this paper, the experimental results of the thermal sub-system of a reliable and cost-effective polygeneration solar system are presented. This polygeneration system produces heating, cooling, and electricity from solar energy, which is used in an existing test building. Heat is generated in four evacuated tube solar collectors (ETCs). The heat may be used for space cooling through a variable geometry ejector (VGE) heat pump. In order to reduce the mismatches between generation and consumption, two thermal storage tanks were added. The performance of a new thermal storage, with 400 L, able to store both sensible and latent heat, was tested. The heating performances of the test building were assessed. Ejector cycle tests were also performed, and the variation of the cooling coefficient of performance (COP) was calculated for different flow rates. For heating, the results showed that the heat storage was capable of heating the test building for 8 h, with temperatures between 22 °C and 26 °C. All results showed that this polygeneration prototype could be capable of meeting the heating and cooling needs when applied to a real building.

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A Polygeneration System Based on Desiccant Air Conditioning Coupled with an Electrical Storage

Cited by 4 publications

References 42 publications

A Sustainable Polygeneration System for a Residential Building

A Sustainable Polygeneration System for a Residential Building

Renewable Energy Source (RES)-Based Polygeneration Systems for Multi-Family Houses

Experimental Analysis of a Polygeneration System: Assessment of the Thermal Sub-System

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