Techno-economic analysis of an exhaust air heat pump system assisted by unglazed transpired solar collectors in a Swedish residential cluster

Saini, Puneet; Bonato, Paolo; Fiedler, F.; Widén, Joakim; Zhang, Xingxing

doi:10.1016/j.solener.2021.06.026

Cited by 15 publications

(3 citation statements)

References 21 publications

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“…Solar air collectors (SACs) are also extensively applied as a renewable energy space heating method [20], and can be coupled with ASHP to enhance both performance [21]. The SAC-coupled ASHP can preheat the evaporator inlet air, thus increasing the evaporation temperature and the COP of the ASHP [22]. However, the frost restraining effect it plays in this process has been ignored by researchers and rarely analyzed.…”

Section: Introductionmentioning

confidence: 99%

The frost restraining effect of solar air collector applied to air source heat pump

Jiang

Zhang

et al. 2023

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

The frost restraining effect of solar air collector applied to air source heat pump

Jiang

Zhang

et al. 2023

Applied Thermal Engineering

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“…Several researchers decided not to include glass as a cover for the solar equipment [31], [32], stating that the efficiency of the unglazed or perforated transpired type collector is relatively higher than that of the glazed solar collector. Also [33], [34], provide studies on the assistance of solar collectors to air-source heat pumps in residential heating processes, indicating that a positive impact on system performance is obtained, since electricity consumption and CO2 emissions are reduced. Additionally [35], [36], have carried out simulations that allow the design of flat plate solar collectors to be optimized in advance, due to the fact that, by means of perforations in the absorber plate, the efficiency of heat transfer offered by the equipment to the working fluid is increased.…”

Section: Introductionmentioning

confidence: 99%

Energy exergetic and economic analysis (3E) in a flat solar collector with thermal storage for air heating

Castillo-Leon,

Zanabria-Ortigoza,

Rincon-Quintero

et al. 2023

PEN

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Solar energy has been considered as a carrier of primary energy to sustain life, representing a renewable energy resource that strengthens industrialization through its use as the main source of energy. This study evaluates the energy, exergetic and economic yields through an analytical approach applied to experimental data obtained in a flat solar collector (SAC) with paraffin as phase change material (PCM) and "V" absorber plate geometry, intended for air heating. The results of the investigation indicated that the energy, exergetic, and exergy destroyed efficiency of the SAC were 71.24%, 16.96%, and 79.66%, respectively. This research allowed us to carry out a sensitivity analysis applied to the results of the thermodynamic variables of the equipment: thermal efficiency, air mass flow and solar radiation; where an improvement in the thermodynamic yields is evidenced by obtaining a thermal efficiency of 91.25%, exergetic efficiency of 61.03% and a decrease in exergy destroyed up to 35.04% of the values obtained experimentally. Through the economic analysis, it was determined that the levelized cost of heating the SAC is 0.0927 USD/kWh, indicating that the project is economically profitable, due to the use of solar energy instead of electrical energy as an input source. Lastly, this research is expected to be a contribution that can support the authors of subsequent projects interested in this technology.

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“…Classically, PVT air systems are widely used for preheating of fresh air entering the building, and thus reducing the space heating (SH) demand. Such systems are most cost effective when the building has a central fresh air supply network, and does not have any ventilation heat recovery system in place [6]. However, in presence of ventilation heat recovery (with or without exhaust air heat pump), the system output is lower and thus limiting the potential usage of recovered heat from a PV system, especially in Nordic climates with lower irradiation.…”

Section: Introductionmentioning

confidence: 99%

Heat Recovery Potential From PV Modules: A Simulation Case Study for a Swedish Residential Building Cluster

Saini,

Fiedler,

Zhang

et al. 2021

Preprint

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Photovoltaic thermal collectors (PVT) can generate electricity and heat from one module. In a typical aerothermal PVT system, the air flow behind the PV modules is created using air channels, and the heated air is ducted to the point of usage. The central aim of this paper is to simulate a system where the recovered heat from a PV installation is utilized in the energy system of a multifamily building cluster in Sweden. The paper tends to establish if the additional cost of "heat recovery system" components justify the savings obtained due to recovered heat from PV. To achieve this, a simulation model is built in TRNSYS for a multi-family building cluster in Sweden. Specifically, two energy system configurations are simulated.1) Recovered heat from PV collectors is used for pre-heating of domestic hot water.2) Heat from PV collectors is used at the evaporator of an air source heat pump to increase its performance. The heat pump is further used to generate domestic hot water.Results show that the advantage of PVT integration is more pronounced when recovered heat is used directly for pre-heating of DHW. The savings are lower when PVT is coupled with heat pump.

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Techno-economic analysis of an exhaust air heat pump system assisted by unglazed transpired solar collectors in a Swedish residential cluster

Cited by 15 publications

References 21 publications

The frost restraining effect of solar air collector applied to air source heat pump

The frost restraining effect of solar air collector applied to air source heat pump

Energy exergetic and economic analysis (3E) in a flat solar collector with thermal storage for air heating

Heat Recovery Potential From PV Modules: A Simulation Case Study for a Swedish Residential Building Cluster

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