Performance study of a quasi grid-connected photovoltaic powered DC air conditioner in a hot summer zone

Liu, Zhongbao; Li, Ao; Wang, Qinghua; Chi, Yuanying; Zhang, Lingfei

doi:10.1016/j.applthermaleng.2017.03.132

Cited by 25 publications

(7 citation statements)

References 15 publications

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“…(1) Energy Conservation: (2) where is the mass flow rate (kg/s), is the heat transfer rate (kW), is the specific enthalpy (kJ/kg) and is the rate of work leaving the control volume (kW).…”

Section: A Conventional Exergy Analysismentioning

confidence: 99%

“…At the same time, air-conditioning demand is increasing significantly on a global scale as a result of climate change, population growth, standard of living conditions and industrialization. Presently, air conditioning alone accounts for 40% to 55% of the total building energy consumption [1], which is a major sector of the total world energy consumption and carbon emissions [2]. The traditional vapor compression air-conditioning system is usually used for providing this cooling comfort, but consumes a huge amount of electricity, triggering the construction of new fossil fuel power plants worldwide.…”

Section: Introductionmentioning

confidence: 99%

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Advanced Exergy Analysis Of Licl-H2O Absorption Air Conditioning System

Aman¹,

Henshaw²,

Ting³

2018

Progress in Canadian Mechanical Engineering

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Increasing energy demand for air conditioning due to climate change is posing a continuous threat to the environment. Absorption airconditioning systems driven by solar thermal or waste heat energy are an alternative for providing cooling comfort in a sustainable manner. The crystallization problem of high performance LiBr-H2O absorption cooling system hinders its small-scale applications. In this study, the potential of a 10 kW LiCl-H2O absorption refrigeration system is discussed and analyzed. The new concept of advanced exergy analysis is coupled with conventional thermodynamic analyses, which provides the available potential of each component for overall system performance improvement. The analyses uncovered that only 45% of the total exergy loss is due to each component's own internal irreversibilities, whereas the remaining is through the interaction of the irreversibilities of other components in the system. The analyses also reveal that 43% of the total exergy loss is unavoidable and 57% can be reduced by improving the overall system efficiency.

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“…(1) Energy Conservation: (2) where is the mass flow rate (kg/s), is the heat transfer rate (kW), is the specific enthalpy (kJ/kg) and is the rate of work leaving the control volume (kW).…”

Section: A Conventional Exergy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advanced Exergy Analysis Of Licl-H2O Absorption Air Conditioning System

Aman¹,

Henshaw²,

Ting³

2018

Progress in Canadian Mechanical Engineering

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show abstract

“…Fischer et al [11] studied the impacts of PV and variable prices on optimal system sizing for heat pump and thermal storage. Liu et al [12] studied the composition and principle of an air conditioner driven by a grid-connected photovoltaic (PV) system and analyzed the working principle of quasigrid-connected energy-saving technology. Wei et al [13] designed a direct current (DC) air conditioning system powered by a solar photovoltaic module (PV) to solve the problem of temperature increase inside the vehicle when it stops in the summer.…”

Section: Introductionmentioning

confidence: 99%

Economic Feasibility Analysis of PVAC and TAC of Three Typical Application Cases in China

et al. 2021

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Solar photovoltaic driven air conditioning (PVAC) system with electricity storage is proposed as a good solution to help shifting peak load and consuming solar energy. In this paper, a grid-connected PVAC system using the TRNSYS simulation model consisting of PV panels, traditional air conditioners (TAC), power conditioning units, inverters, and grid connection equipment is proposed to investigate the economic feasibility compared with the traditional air conditioner. In the PVAC system, the electricity, firstly generated by PV panels and then stored in battery, is consumed by a DC inverter air conditioner to maintain the temperature of the room and the surplus electricity is sold to the grid. A life cycle cost comparison between PVAC system, traditional air conditioning system, and decomposed PV and air conditioning systems of three typical application cases is conducted, in which the operation conditions are based on the present circumstances of China. The results show that, in comparison with conventional air conditioners, better economic benefits can be achieved when the peak load of the air conditioning system is over a certain value. Sensitivity analysis is conducted to evaluate the effects caused by variation of economic assumptions. At last, a new operation model is proposed to achieve more benefits for the system.

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“…However, the main investigated application is in the field of HVAC systems. Liu et al [26] conducted an analysis in the working principle of quasi grid-connected energy-saving technology. They carried out experimental tests using a conventional air conditioner and an economic analysis to investigate the principle and composition of an air conditioner driven by a quasi-grid-connected PV system.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Simulation and Optimization of an Off-grid Solar Photovoltaic Driven Drinking Fountain with Battery Storage

Souza

Gesteira

Almeida

2021

ijsgset

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This paper presents a case study involving the design and energy saving analysis of an off-grid solar photovoltaic driven drinking fountain with battery storage. A dynamic simulation in TRNSYS software is performed to model and evaluate the transient processes occurring in this renewable system. A sensitivity analysis of the main design parameters, power generation capacity and electric storage capacity, was performed in order to optimize the scheme. The case study was carried out at Federal Institute of Education, Science and Technology of Bahia in Salvador, in the northeast of Brazil. The temperature profiles and electrical energy flows of the optimized system are investigated by means of a daily, weekly and yearly analysis. The outcomes achieved show that the optimized system showed a 33.3% increase in thermal efficiency and 15.1 % increase in the global efficiency in relation to the base case. This system was able to produce 5932.7 L of chilled water per year and a 65626.8 Wh reduction of primary energy consumption per year. This study can be applied to universities, schools or places with large flow of people.

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Performance study of a quasi grid-connected photovoltaic powered DC air conditioner in a hot summer zone

Cited by 25 publications

References 15 publications

Advanced Exergy Analysis Of Licl-H2O Absorption Air Conditioning System

Advanced Exergy Analysis Of Licl-H2O Absorption Air Conditioning System

Economic Feasibility Analysis of PVAC and TAC of Three Typical Application Cases in China

Dynamic Simulation and Optimization of an Off-grid Solar Photovoltaic Driven Drinking Fountain with Battery Storage

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