Energy analysis of a thermal system composed by a heat pump coupled with a PVT solar collector

Vallati, Andrea; Ocłoń, Paweł; Colucci, Chiara; Mauri, Luca; Vollaro, Roberto De Lieto; Taler, Jan

doi:10.1016/j.energy.2019.02.152

Cited by 43 publications

(9 citation statements)

References 29 publications

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“…The main advantages of this configuration, as highlighted, for instance, in the study by Vallati et al, [ 47 ] are the possibility of supplying heating using evaporation temperatures that range from 10 to 20 °C even in central Europe. It is, however, worth remarking that, for this specific application, the use of a thermal storage tank is foreseen in almost all the cases examined in the literature and that, for the coldest climates, the integration with a gas or electric heater cannot be avoided.…”

Section: Solar‐coupled Vapor‐compression Heat Pumps For Space Heating...mentioning

confidence: 99%

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Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

2022

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Solar‐assisted heat pumps have the potential to increase the share of renewables in the energy systems for several cases, or to increase the flexibility of smart grids and integrated thermal‐electric grids. The development of such systems requires a comprehensive approach in which technical, market, and social acceptance are all tackled at the same time. Such a holistic approach is the main objective of the present review article. To do so, an investigation is performed by categorizing the integration approaches reported in the literature, exploiting the solar source either as a low‐temperature evaporator source or as supporting the condenser during heating operation. Furthermore, hybrid integration schematics and dual‐source approaches are discussed. Market and social aspects complete the analysis, with the aim of finally identifying the current status; the main drivers and challenges are also addressed. The reported results confirm that the exploitation of solar thermal energy can increase the achievable performance of heat pumps in a broad range of climates. A favorable regulatory/financial framework and informative campaigns for businesspersons and the wide public have been identified as the main solutions to maximize the deployment of the technology in the coming years.

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Section: Solar‐coupled Vapor‐compression Heat Pumps For Space Heating...mentioning

confidence: 99%

Section: Solar Source-space Heating/cooling Distribution Sink and Ind...mentioning

confidence: 99%

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

2022

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“…Bellos et al [18], also using TRNSYS, designed, simulated, and evaluated in energetic and financial terms four SAHPs in order to detect the most suitable heating solution. Vallati et al [19] investigated the potentiality of an energy system equipped with PV/T hybrid solar collectors, storage tanks, and a heat pump for the space heating of a small office for three different European city locations. Barbu et al [20] analyzed the impact of the variation of some thermal parameters of a DHW tank (cold water main temperature, tank size, tank outlet flow, and consumer demand curve) on the electrical efficiency of a PV/T panel.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a solar-assisted dual-tank heat pump system for climatic conditions in Turkey

Yamankaradeni̇z

2022

THERM SCI

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This study aimed to analyze the performance of a solar-assisted dual-tank heat pump (SADTHP) system under climatic conditions in Turkey. This system and its components were modeled and simulated using transient system simulation (TRNSYS) software. The system was designed not only to supply domestic hot water (DHW) for a restaurant, but also to heat it in winter and cool it in summer. The modeled system works on the principle that a water-to-water heat pump operating between dual tanks transfers the heat from the cold water tank (CWT) (source side) to the hot water tank (HWT) (load side). The hot water for both heating and DHW is supplied from the HWT throughout all seasons, whereas, the cold water is supplied from the CWT for cooling the space in summer. A photovoltaic thermal (PV/T) collector was integrated into the CWT to support the source side of the heat pump and also to generate electricity for the system in winter, but was used only for producing electricity in summer. Analyses were carried out for five provinces (Istanbul, Ankara, Izmir, Hakkari, and Trabzon) located in five different regions of Turkey. According to the simulation results, the highest seasonal performance factor (SPF) (2.65) was obtained for Izmir, whereas the lowest SPF value (1.74) was obtained for Hakkari. The system worked 52% more efficiently in Izmir than in Hakkari. With the PV/T collector, 17.68% of the total electrical energy consumption of the system was compensated for Izmir Province and 12.09% for Hakkari Province.

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“…Recently, EU countries are planning to increase their renewable energy share to 30% as well as to increase energy efficiency by 30% compared to 1990. Since the residential sector represents over 27% of global energy consumption and 17% of CO 2 emissions [1], the use of renewable energy systems in building heating is of high importance.…”

Section: Introductionmentioning

confidence: 99%

A New Solar Assisted Heat Pump System with Underground Energy Storage: Modelling and Optimisation

Ocłoń

Ławryńczuk

Czamara³

2021

Energies

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The objectives of this work are: (a) to present a new system for building heating which is based on underground energy storage, (b) to develop a mathematical model of the system, and (c) to optimise the energy performance of the system. The system includes Photovoltaic Thermal Hybrid Solar Panels (PVT) panels with cooling, an evacuated solar collector and a water-to-water heat pump. Additionally, storage tanks, placed underground, are used to store the waste heat from PVT panels cooling. The thermal energy produced by the solar collectors is used for both domestic hot water preparation and thermal energy storage. Both PVT panels and solar collectors are assembled with a sun-tracking system to achieve the highest possible solar energy gain. Optimisation of the proposed system is considered to achieve the highest Renewable Energy Sources (RES) share during the heating period. Because the resulting optimisation problem is nonlinear, the classical gradient-based optimisation algorithm gives solutions that are not satisfying. As alternatives, three heuristic global optimisation methods are considered: the Genetic Algorithm (GA), the Particle Swarm Optimisation (PSO) algorithm, and the Jaya algorithm. It is shown that the Jaya algorithm outperforms the GA and PSO methods. The most significant result is that 93% of thermal energy is covered by using the underground energy storage unit consisting of two tanks.

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Energy analysis of a thermal system composed by a heat pump coupled with a PVT solar collector

Cited by 43 publications

References 29 publications

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

Performance analysis of a solar-assisted dual-tank heat pump system for climatic conditions in Turkey

A New Solar Assisted Heat Pump System with Underground Energy Storage: Modelling and Optimisation

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