Assessment of Energy Consumption in the Residential Building with a Heat Pump

Rimbala, Jan; Votava, Jan; Kynčl, Jan

doi:10.1109/epe.2019.8778066

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…This indicator is lower when a greater temperature rise is required. In many real-life situations, the actual HP's COP is much lower than Carnot's value (Bonin, 2015;Rimbala et al, 2019).…”

Section: Ashp Energy and Exergy Analysismentioning

confidence: 90%

Energy and Exergy Analysis of an Air Source Heat Pump Under Variable Ambient Conditions

Streckienė,

Kropas,

Mikučionienė

et al. 2024

Journal of Environmental Engineering and Landscape Management

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Air source heat pumps (ASHPs) are becoming an increasingly popular heating source for buildings. The paper presents an evaluation of the experimental data from ASHP operation during the heating season in Lithuania when the problem of the evaporator’s surface freezing is visible. The performance of the air-to-water heat pump is examined using energy and exergy analyses performed by a coefficient of performance (COP), COPCarnot, exergy efficiency, and primary energy ratio. Analysis results show that the existing difference between the ideal and actual operation of ASHP represents the demand to improve the performance of ASHP evaporator. The actual COP was from 3.5 to 4.7 times lower than the Carnot COP. At 0 °C and 95% humidity, the ASHP’s performance was least favourable, with an average exergy efficiency of 0.21 and a COP of 1.49.

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“…This indicator is lower when a greater temperature rise is required. In many real-life situations, the actual HP's COP is much lower than Carnot's value (Bonin, 2015;Rimbala et al, 2019).…”

Section: Ashp Energy and Exergy Analysismentioning

confidence: 90%

Energy and Exergy Analysis of an Air Source Heat Pump Under Variable Ambient Conditions

Streckienė,

Kropas,

Mikučionienė

et al. 2024

Journal of Environmental Engineering and Landscape Management

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“…The results reveal, that by introducing a TES to the system, flexibility was provided and the operational costs were reduced by 1% to 7% and the CO 2 emissions by 3% to 17%. Rimbala et al [10] analyzed in their work how accurate the calculation of the necessary energy demand for heating of residential buildings equipped with heat pumps need to be. Reference values obtained by solving partial differential equations for heat losses and heat consumption with respect to actual temperature profiles in time were compared to a static wall model without heat capacity together with average daily and monthly temperatures.…”

Section: Literaturementioning

confidence: 99%

Design of Heat-Pump Systems for Single- and Multi-Family Houses using a Heuristic Scheduling for the Optimization of PV Self-Consumption

Kemmler

Thomas

2020

Energies

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Heat pumps in combination with a photovoltaic system are a very promising option for the transformation of the energy system. By using such a system for coupling the electricity and heat sectors, buildings can be heated sustainably and with low greenhouse gas emissions. This paper reveals a method for dimensioning a suitable system of heat pump and photovoltaics (PV) for residential buildings in order to achieve a high level of (photovoltaic) PV self-consumption. This is accomplished by utilizing a thermal energy storage (TES) for shifting the operation of the heat pump to times of high PV power production by an intelligent control algorithm, which yields a high portion of PV power directly utilized by the heat pump. In order to cover the existing set of building infrastructure, 4 reference buildings with different years of construction are introduced for both single- and multi-family residential buildings. By this means, older buildings with radiator heating as well as new buildings with floor heating systems are included. The simulations for evaluating the performance of a heat pump/PV system controlled by the novel algorithm for each type of building were carried out in MATLAB-Simulink® 2017a. The results show that 25.3% up to 41.0% of the buildings’ electricity consumption including the heat pump can be covered directly from the PV-installation per year. Evidently, the characteristics of the heating system significantly influence the results: new buildings with floor heating and low supply temperatures yield a higher level of PV self-consumption due to a higher efficiency of the heat pump compared to buildings with radiator heating and higher supply temperatures. In addition, the effect of adding a battery to the system was studied for two building types. It will be shown that the degree of PV self-consumption increases in case a battery is present. However, due to the high investment costs of batteries, they do not pay off within a reasonable period.

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Assessment of Energy Consumption in the Residential Building with a Heat Pump

Cited by 2 publications

References 5 publications

Energy and Exergy Analysis of an Air Source Heat Pump Under Variable Ambient Conditions

Energy and Exergy Analysis of an Air Source Heat Pump Under Variable Ambient Conditions

Design of Heat-Pump Systems for Single- and Multi-Family Houses using a Heuristic Scheduling for the Optimization of PV Self-Consumption

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