Analysis of a vapor compression refrigeration system using a fog-cooled condenser

Shah, Surendra H.; Pai, Kalash R.; Shinde, Sachin; Thorat, Bhaskar N.

doi:10.1016/j.applthermaleng.2021.117299

Cited by 9 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They observed a COP increase of approximately 50% with the water-cooled condenser to cool 1 tonne of water compared to the air-cooled condenser. As a result, the coefficient of performance was 4.7, the energy efficiency ratio was 16, and the electricity consumption for water was 844 W/ton [8]. Bai et al is a split ejector based cycle examiner with condenser outlet for high temperature heat pump in operation [9].…”

Section: Description Of the System And Literature Studiesmentioning

confidence: 99%

Exergy efficiency and heat transfer from the condenser in heat pump systems

KAYA,

KAYA

2024

Proc. Rom. Acad. Ser. A - Math. Phys. Tech. Sci. Inf. Sci.

View full text Add to dashboard Cite

In cooling systems, the thermal energy transfer capability of the condensers used for the condensation of the refrigerant is very important for the efficient operation of the systems. A heat pump assembly was installed and R134a was used as the fluid. During operation, the temperature of the refrigerant compressed in the condenser increases and reaches the superheated vapor phase. Heat is transferred from the surface of the condenser, whose temperature is increasing, to the environment with the help of a fan. The exergy efficiency of the condenser was determined based on the inlet and outlet temperature of the refrigerant to the condenser, the temperature of the air flow to and from the condenser surface, its masses and thermodynamic properties. It was observed that the exergy efficiency (ψ) increased and the irreversibility (İ) decreased with the increase of the air temperature difference (ΔT) passing over the condenser surface. In addition, it was determined that the exergy efficiency (ψ) and surface temperature of the condenser decreased with the increase in the amount of air passing through (ma) the condenser surface.

show abstract

Section: Description Of the System And Literature Studiesmentioning

confidence: 99%

Exergy efficiency and heat transfer from the condenser in heat pump systems

KAYA,

KAYA

2024

Proc. Rom. Acad. Ser. A - Math. Phys. Tech. Sci. Inf. Sci.

View full text Add to dashboard Cite

show abstract

“…Currently, mechanical Vapour Compression (VCC) systems are dominant over air conditioning industry, a relatively mature and well-understood technology, but with intensive energy consumption and environmental issues [3,4]. The VCC refrigeration system consists of four main components: compressor, condenser, expansion device, and evaporator, which are connected to produce the refrigeration effect through thermodynamic processes of compression, condensation, expansion, and evaporation [5,6]. There are many thermodynamic losses associated with the operation of vapour compression that need to be addressed to provide high system performance, including constant enthalpy expansion due to high discharge temperature of the refrigerant, large power consumptions, rise in the condenser heat rejection, large throttling losses and drop in refrigeration capacity [7,8].…”

Section: Introductionmentioning

confidence: 99%

Impact of Ambient Temperature and Humidity on the Performance of Vapour Compression Air Conditioning System - Experimental and Numerical Investigation

Andrew Makar,

Saad Mahmoud,

Raya Al-Dadah

et al. 2024

CFDL

View full text Add to dashboard Cite

Due to global warming, population growth, and urbanisation, demands for space cooling in buildings have significantly increased. Mechanical vapour compression cooling technology is relatively mature, well-understood and most commonly used globally. However, they suffer from high energy consumption and adverse environmental impact due to the refrigerants used. As ambient temperature and humidity have significant effects on the performance of vapour compression systems, this paper experimentally and numerically investigates their impact on the performance of vapour compression air conditioning system in terms of power consumption and cooling capacity. It was concluded that at ambient humidity of 55%, as the ambient temperature increases from 22 °C to 40 °C, the compressor temperature has increased from 46 °C to 59 °C which increased its power consumption from 751.2 to 935.52 Watts, giving an increase of 10.24 Watts for every one degree of ambient temperature increase. Also, as ambient humidity in-creased from 32% to 88%, the power consumption increased from 739.2 Watts to 853.2 Watts, an increase of 114 Watts. A validated CFD (Computational Fluid Dynamics) model was developed and predicted a loss in the enthalpy change from 11.7kJ/kg.d.a to 3.6kJ/kg.d.a. due to ambient temperature increasing from 22 °C to 40 °C and a loss of enthalpy change from 12.857kJ/kg.d.a to 5.524kJ/kg.d.a. due to increasing the ambient air humidity from 32% to 88%. This work high-lighted the impacts of ambient conditions on the performance of vapour compression cooling system in terms of increased power consumption and loss of cooling capacity.

show abstract