Heating system with vapour compressor heat pump and vertical U-tube ground heat exchanger

Hanuszkiewicz-Drapała, M.; Składzień, J.

doi:10.2478/v10173-010-0031-8

Cited by 4 publications

(17 citation statements)

References 8 publications

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“…The demand for cool in summer was calculated in a similar way. Mathematical model of VCHP was presented in [10][11][12]. The processes in the vapour compression heat pump systems proceed very slowly.…”

Section: Introductionmentioning

confidence: 99%

“…The set of equations mentioned above is supplemented with the formulae for determination of calorific parameters of the intermediate carrier and refrigerant and with compressor operating characteristic. The set of nonlinear equations obtained in this manner was solved iteratively in each time step [10][11][12]. The scheme of the GHE is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…(1a)-(12a)) [10][11][12]. The set of equations mentioned above is supplemented with the formulae for determination of calorific parameters of the intermediate carrier and refrigerant and with compressor operating characteristic.…”

Section: Introductionmentioning

confidence: 99%

“…The developed model of the building [10,12] assumes a heat exchange with the surroundings through radiation and convection at varied values of solar radiation heat fluxes and values of ambient temperatures, taking account of the unsteady processes of heat transfer through the building walls and in the building floor -ground system. These problems are solved using the ANSYS Fluent program which is called within the in-house computer code as a procedure for determination of the fabric temperature distributions and unit heat fluxes transferred from the air in the building to the inside surfaces of the walls, the roof and the floor.…”

Section: Introductionmentioning

confidence: 99%

“…1) is composed of a vapor compression heat pump unit (VCHP), a horizontal ground heat exchanger (GHE) and heat exchangers -heaters in the heated space [10][11][12]. A heat carrier -an aqueous solution of propylene glycol -circulates in the GHE composed of parallel tubes.…”

Section: Introductionmentioning

confidence: 99%

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Utilization of the horizontal ground heat exchanger in the heating and cooling system of a residential building

Hanuszkiewicz-Drapała

Bury

2016

Archives of Thermodynamics

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This paper presents the results of thermodynamic analyses of a system using a horizontal ground heat exchanger to cool a residential building in summer and heat it in the autumn-winter period. The main heating device is a vapour compression heat pump with the ground as the lower heat source. The aim of the analyses is to examine the impact of heat supply to the ground in the summer period, when the building is cooled, on the operation of the heating system equipped with a heat pump in the next heating season, including electricity consumption. The processes occurring in cooling and heating systems have an unsteady nature. The main results of the calculations are among others the time-dependent values of heat fluxes extracted from or transferred to the ground heat exchanger, the fluxes of heat generated by the heat pump and supplied to the heated building by an additional heat source, the parameters in characteristic points of the systems, the temperature distributions in the ground and the driving electricity consumption in the period under analysis. The paper presents results of analysis of cumulative primary energy consumption of the analyzed systems and cumulative emissions of harmful substances.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Utilization of the horizontal ground heat exchanger in the heating and cooling system of a residential building

Hanuszkiewicz-Drapała

Bury

2016

Archives of Thermodynamics

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Thermodynamic analysis of the Compressed Air Energy Storage system coupled with the Underground Thermal Energy Storage

et al. 2019

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Improvement of flexibility is one of the key challenges for the transformation of the Polish Power System aiming at a high share of renewable energy in electricity generation. Flexible and dispatchable power plants will contribute to this ongoing transformation process as they compensate for fluctuations in electricity generation from renewable energy sources such as wind and photovoltaics. In this context, CAES storage tanks are currently the only alternative to storage facilities using pumped-storage hydroelectricity due to the possibility of obtaining the appropriate energy capacity of the storage facility. However, a relative disadvantage of these plants is the heat loss caused by the cooling of the air after compression. The basic elements of the CAES warehouse are: an air compression station, a compressed air reservoir that is also a storage facility (in the existing solutions, these are underground caverns), an expansion station with combustion chambers and gas turbines, and a generator. A key aspect of CAES is the optimal configuration of the thermodynamic cycle. In this paper, the situation of cooperation between the current conventional power plants and wind farms is first analysed, and then, based on thermodynamic models, the process of storing thermal and electrical energy in the CAES system coupled with heat recovery after the gas turbine is analysed. A solution with a ground heat exchanger was also proposed, as the soil, due to its properties, may serve as a thermal energy storage. The paper also analyzes the discharge of the heat storage based on CFD approaches. The ground can be charged during the cooling down of the compressed air. On the other hand, thermal energy was recovered when water flowing to the heat customers was heated. On the basis of non-stationary calculations, the heat stream received from the underground thermal energy storage was estimated.

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Modeling of the Processes of Heat and Mass Transfer in the Thin Tube Given the Conditions of Exchange with Surrounding Soil

Safonyk

Prysiazhniuk

2019

2019 IEEE 14th International Conference on Computer Sciences and Information Technologies (CSIT)

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Heating system with vapour compressor heat pump and vertical U-tube ground heat exchanger

Cited by 4 publications

References 8 publications

Utilization of the horizontal ground heat exchanger in the heating and cooling system of a residential building

Utilization of the horizontal ground heat exchanger in the heating and cooling system of a residential building

Thermodynamic analysis of the Compressed Air Energy Storage system coupled with the Underground Thermal Energy Storage

Modeling of the Processes of Heat and Mass Transfer in the Thin Tube Given the Conditions of Exchange with Surrounding Soil

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