Performance analysis of system heat pump - heat recuperator used for air treatment in process industry

Milovančević, Uroš; Kosi, Franc F.

doi:10.2298/tsci160225132m

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…In this manner, heat from the exhaust air stream is transferred through the separating plates, and into the supply air stream. Manufacturers claim gross efficiencies of up to 80% depending upon the specification of the unit (Milovančevič and Kosi 2016;Albers 2016). Many users report installation problems: BOX 1.8 Opinion evidence Some of the important disadvantages of the installed recuperator are noise and dry air.…”

Section: Box 17 Study Evidencementioning

confidence: 99%

Introduction

Dovjak¹,

Kukec²

2019

Creating Healthy and Sustainable Buildings

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Section: Box 17 Study Evidencementioning

confidence: 99%

Introduction

Dovjak¹,

Kukec²

2019

Creating Healthy and Sustainable Buildings

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“…In China, a large amount of geothermal energy lower than 50 ℃ in the form of low-grade energy cannot be used for residents heating due to difficulties of transforming the energy into useful high-grade energy. Heat pump is an efficient way to upgrade low temperature geothermal water up to a more feasible high temperature for residents heating and reduce the fossil energy consumption and CO 2 emission [5][6][7]. Compared to conventional vapour compression heat pumps, the CAHP cycle provides a number of attractive advantages [8,9].…”

Section: Introductionmentioning

confidence: 99%

Development of a compression-absorption heat pump system for utilizing low-temperature geothermal water

Gong¹,

Luo²,

Lu³

et al. 2017

THERM SCI

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Heat pump is an effective way to use the low temperature geothermal water with temperature lower than 50 ℃ for building heating. Compared to the conventional vapour compression heat pump, the compression-absorption heat pump (CAHP) can obtain higher heat sink temperature with lower compression ratio. Besides, the temperature glide in the generator and absorber of CAHP can be fitted to the heat source and heat sink, which achieves better coefficient of performance. Two models, respectively, for the generator and whole system using ammonia-water (NH 3-water) as the working fluid are proposed, and the effects of different concentration of strong solution, cycle ratios, heat source temperature and spray density on the generator are investigated. The objective is to analyse the performance of CAHP system driven by low temperature geothermal water. The results show that the maximum of overall heat transfer coefficient of the vertical out-tube falling film generator can be obtained with the optimum spray density of around 0.16 kg/ms and there is an optimum concentration of around 65% for the CAHP system. When the low heat source temperature between 30 ℃ and 40 ℃, the high heat sink temperature can reach to 65-70 ℃.

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Optimization of the fan coil cooling system and the air source heat pump using a moderated mediation model

Ozdemir,

Onat

2024

THERM SCI

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The data obtained from a heating and cooling system comprised of a fan coil unit integrated air source heat pump used in Istanbul, Turkey, as well as data on outdoor conditions, was analyzed in this study. The analysis was carried out with the help of the moderated mediation model, which is included as a process analysis in the ?Statistical Package for the Social Sciences? application. In this study, a mathematical model of the moderated mediation model was created and the efficiency coefficients of the parameters effecting performance were calculated. It was discovered that the effect of medium and high relative humidity values on the outdoor temperature was about 4.81%. The heat pump fails to transmit heat to the environment outside as a result of medium and high relative humidity values increasing the outdoor temperature. As a result of this it has been found that relative humidity values have a negative effect on the water temperature entering the fan coil unit by approximately -1.18%. This result of the study shows that the outlet water temperature of the fan coil unit does not adequately cool the rooms in the summer. It has been discovered that while wind velocity negatively affects performance affecting parameters, low relative humidity values have no effect on them.

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Performance analysis of system heat pump - heat recuperator used for air treatment in process industry

Cited by 3 publications

References 6 publications

Introduction

Introduction

Development of a compression-absorption heat pump system for utilizing low-temperature geothermal water

Optimization of the fan coil cooling system and the air source heat pump using a moderated mediation model

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