Power management strategy for a parallel hybrid-power gas engine heat pump system

Wan, Xiaoming; Liang, Cai; Yan, Jie; Ma, Xiaofan; Chen, Tao; Zhang, Xiaosong

doi:10.1016/j.applthermaleng.2016.07.138

Cited by 19 publications

(13 citation statements)

References 13 publications

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“…These models are based on experimental measurements in all possible conditions of temperature and heat load. 6. Reliable data on gas consumption, electric current consumption, efficiency and waste heat values are measured experimentally by placing the device tested in a thermostatic chamber.…”

Section: Discussionmentioning

confidence: 99%

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A comparative study on electric and gas engine heat pump

Kuryło

Ruciński

2019

E3S Web Conf.

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The paper compares heat pumps driven by electric motors (EHP) with heat pumps driven by gas engines (GEHP). GEHPs are still a novelty on the Polish HVACR market - therefore, the subject of the study is to indicate whether in Polish climatic conditions their use is profitable. A thorough analysis of the energy consumption of selected devices was carried out due to the consumption of utilities needed for their propulsion and the related costs. This has been done by calculating seasonal efficiency coefficients and using an innovative method of comparative modifiers allowing for unification of the performance of EHP and GEHP pumps. The results obtained include average energy efficiency coefficients, operating costs and payback times. Discussion of the calculation results proved that under certain assumptions GEHP pumps may be competitive with EHP heat pumps due to the possibility of managing waste heat at high temperatures.

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Section: Discussionmentioning

confidence: 99%

“…Choosing GEHP instead of EHP leads to a reduction in electricity consumption, what could be important during summer peak demand for air conditioning drive. one favours the country's power system [6]. Then lower fluctuations in demand and lower maximum demand reduce the investment needs in peak and intermediate load power plants.…”

Section: Power System Issuesmentioning

confidence: 99%

A comparative study on electric and gas engine heat pump

Kuryło

Ruciński

2019

E3S Web Conf.

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“…As an energy‐saving alternative, an air‐conditioning heat pump (ACHP) system is another heating method by using the outside air as a heat source, which has been widely applied in residential and industrial heating applications. Utilizing ACHP in EVs has been proved to be highly efficient in system energy and can save up to 20% lower battery energy consumption compared with the PTC heater in winter conditions . The ACHP applied in EVs has two typical approaches.…”

Section: Introductionmentioning

confidence: 99%

“…Utilizing ACHP in EVs has been proved to be highly efficient in system energy and can save up to 20% lower battery energy consumption compared with the PTC heater in winter conditions. 5,6 The ACHP applied in EVs has two typical approaches. One is using two heat exchangers with a four-way valve to switch between cooling and heating modes, and the other is using three heat exchangers with two three-way valves or bypass valves.…”

Section: Introductionmentioning

confidence: 99%

An experimental and theoretical investigation of refrigerant charge on a secondary loop air‐conditioning heat pump system in electric vehicles

Lan

et al. 2019

Int J Energy Res

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Summary Automotive air‐conditioning heat pump systems are particular interest worldwide in energy conservation and emission reduction for electric vehicles, hybrid electric vehicles, and fuel cell electric vehicles. Refrigerant charge amount is a key factor for the air‐conditioning heat pump system optimization affecting the condensing pressure and subcooling in both heating and cooling modes. In this paper, the influence of the refrigerant charge on system performances was investigated using the experiment method on a secondary loop air‐conditioning heat pump system. The typical heat transfer and flow parameters were recorded, and both cooling and heating performances of the system were investigated and illustrated by pressure‐enthalpy diagrams. The critical refrigerant charges were determined in both heating and cooling modes. Three typical void fraction correlation models were also applied for the refrigerant charge determination modeling as a system off‐design method. Results show that the Hughmark void fraction correlation method has the best prediction of the critical refrigerant charge in both cooling and heating modes.

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“…Recently, a hybrid gas engine-driven heat pump system was proposed by Wan et al [17] and its primary energy ratio, the ratio of the useful energy output to the primary energy input, can achieve up to 1.09. Shang et al [18] analysed another type of hybrid power-driven heat pump system theoretically.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a gas-fuelled water heater based on combined power and heat pump cycles

Liang

Al-Tameemi

2018

Applied Energy

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In this paper, we proposed and demonstrated a novel gas-fuelled hot water system based on combined power and heat pump cycles. It essentially integrates a premixed gas burner, an organic Rankine cycle (ORC) power plant, and an air source heat pump for supplying hot water. An ORC power plant generates mechanical power from the thermal energy produced from the combustion of natural gas in the burner. Subsequently, the generated power directly drives a vapour compression cycle heat pump through a common shaft connecting the expander and the compressor. Cold tap water is headed firstly in the condenser of the heat pump, then in the condenser of the ORC power plant, and finally the flue gas exiting from the burner in a post heater. The flue gas exiting the post heater will be mixed with ambient air to further extract its residual heat in the evaporator of the heat pump. The advantages of the proposed system are threefold. First, the waste heat of the power cycle has been fully recovered. Second, the heat pump operates on a much lower temperature difference, leading to 2 higher COP. Third, it has no electrical generator or motor, avoiding the transduction losses. A comprehensive analysis has been presented in this paper, and the results show that the proposed system can achieve an overall fuel-to-heat efficiency up to 147% when the cold water is heated from 10 to 65 °C and the ambient air temperature is in the range-5 to 5 °C. The research results demonstrated that the proposed technology has a great potential for hot water applications.

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Power management strategy for a parallel hybrid-power gas engine heat pump system

Cited by 19 publications

References 13 publications

A comparative study on electric and gas engine heat pump

A comparative study on electric and gas engine heat pump

An experimental and theoretical investigation of refrigerant charge on a secondary loop air‐conditioning heat pump system in electric vehicles

Investigation of a gas-fuelled water heater based on combined power and heat pump cycles

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