Performance and economic evaluation of a photovoltaic/thermal (PV/T)-cascade heat pump for combined cooling, heat and power in tropical climate area

Kong, Rithy; Deethayat, Thoranis; Asanakham, Attakorn; Kiatsiriroat, Tanongkiat

doi:10.1016/j.est.2020.101507

Cited by 29 publications

(6 citation statements)

References 20 publications

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“…Considerable research to enhance the heat pump performance has been performed in various domains, with the relevant studies focused on system design and improvement [10][11][12][13], control [14,15], building operation optimization [16,17], energy efficiency analyses [18][19][20] and comparison [21,22], and economic analyses [23,24].…”

Section: Literature Reviewmentioning

confidence: 99%

Cooling Performance Enhancement of a 20 RT (70 kW) Two-Evaporator Heat Pump with a Vapor–Liquid Separator

Yang

Kim

2022

Energies

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20 RT (70 kW) two-evaporator heat pump system was developed, manufactured, and tested to enhance the cooling performance using a vapor–liquid separator. In the proposed system, two evaporators are connected in series, and the refrigerant passing through the primary evaporator is separated into vapor and liquid using a vapor–liquid separator. The vapor refrigerant is passed to the compressor, whereas the liquid phase flows into the second evaporator. The amount of vapor refrigerant sent to the compressor can be adjusted through a needle valve opening (0%, 50%, and 100%). The influence of this parameter on the cooling performance was analyzed. The cooling performance tests were repeated five times to check repeatability. Data associated with the air and refrigerant sides were obtained, and the average coefficients of performance (COPs) were calculated. The average COP associated with the air side was approximately 5% lower than that pertaining to the refrigerant side owing to the heat loss. In terms of the air-side cooling performance, the average COP was 3.14, 3.40, and 3.68 when the valve openings were 0%, 50%, and 100%, respectively. The cooling performance when the valve opening was 100% was 17.2% higher than that for the valve opening of 0%. The findings demonstrated that the cooling performance of a heat pump can be enhanced using two evaporators and a vapor–liquid separator.

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Section: Literature Reviewmentioning

confidence: 99%

Cooling Performance Enhancement of a 20 RT (70 kW) Two-Evaporator Heat Pump with a Vapor–Liquid Separator

Yang

Kim

2022

Energies

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“…Therefore, their performance should be improved through the optimization of the solar collector area, angle, and water tank capacity. Kong et al [19] presented the appropriate number of PV/T modules through a performance analysis and an economic comparison of PV/T-cascade heat pumps for cooling and heating periods in tropical climates. Bae et al [20] found that a PV/T-ASHP system installed in a small building improved heating and cooling performance coefficients by 52% compared to an ASHP system used alone.…”

Section: Introductionmentioning

confidence: 99%

Achieving Energy Self-Sufficiency in a Dormitory Building: An Experimental Analysis of a PV–AWHP-ERV Integrated System

Yang,

Kang,

Ahn

2024

Buildings

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In this study, we investigated the performance of air-to-water heat pump (AWHP) and energy recovery ventilator (ERV) systems combined with photovoltaics (PV) to achieve the energy independence of a dormitory building and conducted an analysis of the energy independence rate and economic feasibility by using energy storage devices. Our data were collected for 5 months from July to November, and the building energy load, energy consumption, and system performance were derived by measuring the PV power generation, purchase, sales volume, AWHP inlet and outlet water temperature, and ERV outdoor, supply, and exhaust temperature. When analyzing representative days, the PV–AWHP integrated system achieved an energy efficiency ratio (EER) of 4.49 and a coefficient of performance (COP) of 2.27. Even when the generated electrical energy exceeds 100% of the electricity consumption, the energy self-sufficiency rate remains at 24% due to the imbalance between energy consumption and production. The monthly average energy self-sufficiency rate changed significantly during the measurement period, from 20.27% in November to 57.95% in September, highlighting the importance of energy storage for self-reliance. When using a 4 kWp solar power system and 4 kWh and 8 kWh batteries, the annual energy self-sufficiency rate would increase to 67.43% and 86.98%, respectively, and our economic analysis showed it would take 16.5 years and more than 20 years, respectively, to become profitable compared to the operation of an AWHP system alone.

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“…A polygeneration system was proposed and studied in Chiang Mai, Thailand, by Kong and colleagues [9]. The model proved that combining systems enables a more significant individual performance generation for the thermic and photovoltaic systems and the heat pump.…”

Section: Introductionmentioning

confidence: 99%

Study on the Technical and Economic Viability of a Polygeneration Energy System Applied to a Hospital Unit in Bahia’s Countryside, Brazil

Pedro Freire de Carvalho Paes Cardoso,

Turan Dias Oliveira,

Alex Álisson Bandeira Santos

2023

JBTH

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The present study aims to propose a polygeneration system model, integrating multiple forms of energy generation, such as photovoltaic systems, heat pumps, and other existing storage models to be used in a small-sized hospital unit in Bahia’s countryside. A polygeneration system was developed through a basic Project of the individual components and their integration as a unified system. The COP value, energy saving, and macro investment predictions were calculated, and financial indicators such as payback time, VPL, and TIR were determined. The results showed that the proposed system can supply the hospital’s energy demands and be considered a stimulating investment.

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Performance and economic evaluation of a photovoltaic/thermal (PV/T)-cascade heat pump for combined cooling, heat and power in tropical climate area

Cited by 29 publications

References 20 publications

Cooling Performance Enhancement of a 20 RT (70 kW) Two-Evaporator Heat Pump with a Vapor–Liquid Separator

Cooling Performance Enhancement of a 20 RT (70 kW) Two-Evaporator Heat Pump with a Vapor–Liquid Separator

Achieving Energy Self-Sufficiency in a Dormitory Building: An Experimental Analysis of a PV–AWHP-ERV Integrated System

Study on the Technical and Economic Viability of a Polygeneration Energy System Applied to a Hospital Unit in Bahia’s Countryside, Brazil

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