Heating system return temperature effect on heat pump performance

M Maivel, J Kurnitski - Energy and Buildings, 2015 - Elsevier
In this paper the heating system return temperature effect on condensing temperature and
the seasonal performance factor of the heat pump was measured and quantified with …

[PDF][PDF] Enhancing the Energy Efficiency—COP of the Heat Pump Heating System by Energy Optimization and a Case Study. Energies 2023, 16, 2981

A Nyers, J Nyers - 2023 - researchgate.net
This article deals with the degrees of freedom and possible optimums, specifically with the
energy optimums of the heat pump heating system. The authors developed an multi …

Enhancing the Energy Efficiency—COP of the Heat Pump Heating System by Energy Optimization and a Case Study

A Nyers, J Nyers - Energies, 2023 - mdpi.com
This article deals with the degrees of freedom and possible optimums, specifically with the
energy optimums of the heat pump heating system. The authors developed an multi …

Dynamic thermal dimensioning of underground spaces

L Kajtar, J Nyers, J Szabo - Energy, 2015 - Elsevier
The accurate dynamic determination of the average energy demand of an underground
space is difficult because the soil surrounding the rooms is a semi-infinite space and its …

The advantages of fuzzy control for heat pumps systems

R Sánta, J Simon, L Garbai - Periodica Polytechnica Mechanical …, 2023 - pp.bme.hu
Application of fuzzy control has been observed in various engineering fields due to its ability
to handle uncertainties and non-linearities. In this study, the advantages of using fuzzy …

A modified mathematical model of heat pump's condenser for analytical optimization

J Nyers, L Garbai, A Nyers - Energy, 2015 - Elsevier
The aim of this article is to present the reason and the process of creating new modified
mathematical model of heat pump plate condenser. The fundamental mathematical model is …

Measurement testing of heat transfer coefficients in the evaporator and condenser of heat pumps

R Sánta, L Garbai - Journal of Thermal Analysis and Calorimetry, 2015 - Springer
In our earlier studies, it has been stated that the validity and limits of correlations developed
for the calculation of heat transfer processes in the evaporator and condenser of heat pumps …

Determination of optimal pipe diameters for radial fixed-track district heating networks

L Garbai, A Jasper, J Kontra - Periodica Polytechnica Civil Engineering, 2014 - pp.bme.hu
This paper presents the basics of Bellmann's dynamic programming, to be applied for radial
fixed-track district heating networks. A decision-making model thereof is produced, and …

Compressor Heat Pump Model Based on Refrigerant Enthalpy and Flow Rate

P Obstawski, T Bakoń, J Gajkowski - Advances in Science and …, 2023 - yadda.icm.edu.pl
This paper introduces a compressor heat pump model using flow rate and enthalpy values
for the calculation of heat pump control parameters. The aim of in this article presented …

[PDF][PDF] Expected thermal comfort in underground Spaces

J Szabó, L Kajtár - EXPRES 2016, 2016 - researchgate.net
In this paper a method is presented for dimensioning underground spaces in terms of heat
transfer characteristics and thermal comfort. The accurate dynamic determination of the …