Automatic storage of building thermal energy and heat pump heating based on wireless communication

Zhang, Le

doi:10.2298/tsci2302183z

THERM SCI

2023

DOI: 10.2298/tsci2302183z

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Automatic storage of building thermal energy and heat pump heating based on wireless communication

Le Zhang

Abstract: By means of ZigBee wireless communication technology and heat pump heating technology, the author reduces energy consumption, solve the problem of large energy consumption of building heat pump heating at present. Firstly, the characteristics and applications of ZigBee wireless technology in the system design are adopted, and its protocol stack structure and topology are analyzed, respectively, select your own network structure according to the characteristics of this system. According to its… Show more

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Cited by 7 publications

References 8 publications

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A competitive study of a geothermal heat pump equiped with an intermediate economizer for R134a and R513A working fluids

Aryanfar,

Mohtaram,

Ghazy

et al. 2023

Therm sci

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At temperatures below 60?C, the best way to use geothermal sources for heating is to use heat pumps. A heat pump can provide air conditioning for a residential, commercial, etc., all year round by heating in winter and cooling in summer using a low-temperature source. Also, a heat pump can be used for water distillation through evaporation. The ground source heat pump with a high COP and low-temperature thermal energy sources is one of the best technologies for using renewable energy sources. In the present study, the effects of changing ambient temperature and soil temperature on a heat pump's overall COP and energy efficiency are investigated using a simulated geothermal heat pump with an economizer. The system's thermodynamic simulation is first performed in the EES software for R134a and R513A working fluids. The exergy destruction of different components for both working fluids was calculated and displayed as a figure. COP of the heat pump for R134a working fluid is equal to 3.916, equal to 3.729 for R513A working fluid, which indicates that R134a fluid has about 5% better performance. COP of the system for R134a working fluid is equal to 3.662, which is equal to 3.504 for R513A working fluid, which indicates that R134a fluid has about 4.5% better performance.

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A competitive study of a geothermal heat pump equiped with an intermediate economizer for R134a and R513A working fluids

Aryanfar,

Mohtaram,

Ghazy

et al. 2023

Therm sci

View full text Add to dashboard Cite

show abstract

Energy, exergy and exergoeconomic analysis of a trans-critical CO2 cycle powered by a single flash geothermal cycle in with/without economizer working modes

Aryanfar,

Mohtaram,

Garcia Castellanos

et al. 2024

THERM SCI

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The global utilization of renewable energy sources, particularly geothermal energy, is rising and the inefficient nature of geothermal cycles necessitates recovering lost heat. This research proposes a combined power generation cycle that simulates integrating a trans-critical carbon dioxide cycle with a single flash geothermal cycle, utilizing the EES. The study contrasts the system's performance between two operating states: "Without Economizer" and "With Economizer". The investigation analyzes the impact of an economizer on key output parameters, including energy efficiency, exergy efficiency, and net power output. In the "With Economizer" operating state, the net power output experiences a noticeable increase from 201.5 kW to 204.7 kW, resulting in a 1.58% enhancement in the performance of the "With Economizer" system. The energy efficiency metric demonstrates a corresponding improvement, rising by 1.55% from 3.28% in the "Without Economizer" system to 3.331% in the "With Economizer" system, aligning with the principles of the first law of thermodynamics. Furthermore, the energy efficiency, expressed as a percentage of energy units, shows an increase from 16.3% in the "Without Economizer" system to 16.56% in the "With Economizer" system, representing a 1.595% improvement based on the second law of thermodynamics or exergy. Regarding cost analysis, the study identifies the optimal separator pressure value for the system without an economizer, equivalent to 23. This configuration achieves a total cost rate of 01 $/GJ. Conversely, in the system with an economizer, the optimal pressure value for the production cost rate is 322.4 kPa, resulting in a cost rate of 23.57 $/GJ.

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A data analysis system for thermal energy loss in electrical automation management

Yin,

Zhang

2024

THERM SCI

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In order to achieve data analysis of thermal energy loss for electrical automation management, the author proposes a Broyden Fletcher Goldfarb Shanno (BFGS) trust region algorithm based thermal energy loss calculation method for the integrated energy system of electricity and gas, the BFGS trust region algorithm is utilized to obtain the thermal energy loss distribution of natural gas system, which is not highly dependent on the initial value, this solves the problem of non-convergence in power flow calculation when using the Newton method for calculation. The experimental results show that the relative errors of natural gas system node pressure, pipe-line flow and power system node voltage and phase angle calculated by Newton?s method and BFGS trust region algorithm are within 1 ? 10-4, within the allowable range, which verifies the correctness of the calculation results of the method described by the author. It has been proven that the BFGS trust region algorithm can achieve data analysis of thermal energy loss for electrical automation management.

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Automatic storage of building thermal energy and heat pump heating based on wireless communication

Cited by 7 publications

References 8 publications

A competitive study of a geothermal heat pump equiped with an intermediate economizer for R134a and R513A working fluids

A competitive study of a geothermal heat pump equiped with an intermediate economizer for R134a and R513A working fluids

Energy, exergy and exergoeconomic analysis of a trans-critical CO2 cycle powered by a single flash geothermal cycle in with/without economizer working modes

A data analysis system for thermal energy loss in electrical automation management

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