Numerical modeling of latent heat thermal energy storage integrated with heat pump for domestic hot water production

Inkeri, Eero; Tynjälä, T.; Nikku, Markku

doi:10.1016/j.applthermaleng.2022.118819

Cited by 17 publications

(4 citation statements)

References 53 publications

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“…Therefore, higher efficiency combined with thermal recycling increases the overall system performance significantly. Furthermore, the integration of the system with a heat pump as presented in [30] demonstrates that the thermal performance of the system is increased along with a decrease in the power consumption of the pumping system. Thus, a high efficiency and smaller model are advantageous for delivering a significant positive impact on the thermal system, which utilizes heat transfer fluid, particularly for a small-scale thermal system.…”

Section: Discussion Of the Results From The Design And Experiments Of...mentioning

confidence: 99%

Advanced design of a small-scale mini gerotor pump in a high-temperature and high-viscosity fluid thermal system

Zariatin

Suwandi

2023

EEJET

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In this research, the development of a small-scale heat transfer gerotor pump with an advanced arrangement for high-viscosity and high-temperature fluids is described comprehensively. The small-scale pump design aims to meet the needs of modular components for industry and research, especially for small-scale heat transfer applications such as residential heating systems. VDI 2221 approach was used to construct an advanced gerotor pump with an internal reservoir unit that can generate additional pressure and minimize the slip factor, thereby increasing its volumetric efficiency. The developed small-scale pump was designed in a smart arrangement, which required fewer components than a typical heat transfer pump. This helps to reduce the maintenance of the pump and its components. Experimental tests were performed using a testing apparatus equipped with a heater, a control system using Pulse Width Modulation (PWM) adjustment, valves, pressure, and temperature gauges. The instruments in the apparatus test were used to control the flow rate and pump speed and monitor the temperature of the working fluid. The results of the experiment show that the advanced gerotor pump was able to deliver fluid with a viscosity of 307 ml/min and a temperature of up to 230 °C. The components arrangement minimizes the slip factor, which is mostly the main challenge of positive displacement pumps. The maximum slip coefficient of the advanced gerotor pump design is 0.095. The volumetric efficiency was in the range of 0.803–0.905 when the pump operated at 2,100 RPM and 230 °C. The experiment and analysis results show that the pump can be implemented for the actual application of the thermal system, for research and industry

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Section: Discussion Of the Results From The Design And Experiments Of...mentioning

confidence: 99%

Advanced design of a small-scale mini gerotor pump in a high-temperature and high-viscosity fluid thermal system

Zariatin

Suwandi

2023

EEJET

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“…The topics related to latent heat have been and continue to be the subject of many model studies carried out in various areas. Recently, Inkeri et al realized the numerical modeling of latent heat thermal energy storage integrated with the heat pump for domestic hot water production [ 15 ]. Proell et al described phase change and latent heat models for the simulation of metal powder bed fusion additive manufacturing processes on the macroscale level [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…D3Q15: e (0) = (0, 0, 0), e (1,2) = (±1, 0, 0), e (3,4) = (0, ±1, 0), e (5,6) = (0, 0, ±1), e (7-14) = (±1, ±1, ±1), and w (0) = 2/9, w (1-6) = 1/9, w (7-14) = 1/72. -D3Q19: e (0) = (0,0,0), e (1,2) = (±1, 0, 0), e (3,4) = (0, ±1, 0), e (5,6) = (0, 0, ±1), e(15,16,17,18) = (±1, ±1, 0), e(11,12,13,14) = (±1, 0, ±1), e (7,8,9,10) = (0, ±1, ±1), and w (0) = 1/3, w (1-6) = 1/18, w (7-18) = 1/36.Materials 2023, 16, x FOR PEER REVIEW 12…”

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confidence: 99%

3D Model of Heat Flow during Diffusional Phase Transformations

Łach

Svyetlichnyy

2023

Materials

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The structure of metallic materials has a significant impact on their properties. One of the most popular methods to form the properties of metal alloys is heat treatment, which uses thermally activated transformations that take place in metals to achieve the required mechanical or physicochemical properties. The phase transformation in steel results from the fact that one state becomes less durable than the other due to a change in conditions, for example, temperature. Phase transformations are an extensive field of research that is developing very dynamically both in the sphere of experimental and model research. The objective of this paper is the development of a 3D heat flow model to model heat transfer during diffusional phase transformations in carbon steels. This model considers the two main factors that influence the transformation: the temperature and the enthalpy of transformation. The proposed model is based on the lattice Boltzmann method (LBM) and uses CUDA parallel computations. The developed heat flow model is directly related to the microstructure evolution model, which is based on frontal cellular automata (FCA). This paper briefly presents information on the FCA, LBM, CUDA, and diffusional phase transformation in carbon steels. The structures of the 3D model of heat flow and their connection with the microstructure evolution model as well as the algorithm for simulation of heat transfer with consideration of the enthalpy of transformation are shown. Examples of simulation results of the growth of the new phase that are determined by the overheating/overcooling and different model parameters in the selected planes of the 3D calculation domain are also presented.

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“…The commonly used thermal storage methods include sensible heat storage, phase change heat storage (latent heat storage), and chemical heat storage. Phase change heat storage is widely used due to its high energy density and low temperature during phase transition [15], [16], [17].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Air Source Heat Pump Heating System Based on Phase Change Heat Storage

Guo,

Yu,

Wang

et al. 2023

IEEE Access

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With continuous advancement of policies regarding to energy conservation, emission reduction and clean heating, the market for air source heat pumps is rapidly growing. In the current situation, the need to reduce operating costs of heat pump heating has become urgent. This study proposes a distributed air source heat pump heating system based on phase change heat storage. The system utilizes a phase change heat storage device to transfer heat load from high electricity price periods to low electricity price periods. In order to reduce operating costs, control schemes are formulated based on peak-valley electricity pricing. The system has been tested in Qinghai Province, a high-altitude area in China. Results demonstrate that the system helps to achieve the decoupling between heating and power. The proportion of low-valley electricity consumption in the system increased to an average of 57.45%, while the proportion of peak electricity consumption decreased to an average of 12.41%. The daily electricity costs were reduced by 5.28% compared to direct heat pump heating. With the same thermal storage capacity, application of suitable operation scheme increased COP by 21.76%, reduced electricity consumption and operating costs by 5.69% and 13.50% respectively. Increasing the capacity to 150 kW• h can further reduce operating costs by 10.04%.INDEX TERMS Air source heat pump, phase change heat storage, heat load transfer, economy, operation optimization.

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Numerical modeling of latent heat thermal energy storage integrated with heat pump for domestic hot water production

Cited by 17 publications

References 53 publications

Advanced design of a small-scale mini gerotor pump in a high-temperature and high-viscosity fluid thermal system

Advanced design of a small-scale mini gerotor pump in a high-temperature and high-viscosity fluid thermal system

3D Model of Heat Flow during Diffusional Phase Transformations

Experimental Study on Air Source Heat Pump Heating System Based on Phase Change Heat Storage

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