Air Side Performance of Brazed Aluminum Heat Exchangers

Chang, Yu; Wang, Chi-Chuan

doi:10.1615/jenhheattransf.v3.i1.20

Cited by 74 publications

(23 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…T.be air side pressure drop was calculated by using the method described by Kays and London (1~98) using the Chang and Wang (1996) The given conditions for each segment are: air inlet temperature, airflow rate, refrigerant flow rate and refrigerant inlet pressure and temperature. There are four unknowns in equations 1 to 4, so the problem can be solved simultaneously for refrigerant exit pressure and temperature, gas cQoler capacity and air exit temperature.…”

Section: Simulation Modelmentioning

confidence: 99%

R-744 gas cooler model development and validation

Yin

Bullard

Hrnjak

2001

International Journal of Refrigeration

View full text Add to dashboard Cite

AJirst principles-based model was developed for a transcritical C02 gas cooler, using a finite element method. The model uses published correlations for refrigerant and airside heat transfer and pressure drop. Experimental results are presented at 48 operating conditions. The model predicted the gas cooler capacity within ±2% and pressure drop on the R744 side well within the range of experimental error. The model's usefulness is demonstrated by analyzing alternative circuiting and multi-slab designs.

show abstract

Section: Simulation Modelmentioning

confidence: 99%

R-744 gas cooler model development and validation

Yin

Bullard

Hrnjak

2001

International Journal of Refrigeration

View full text Add to dashboard Cite

show abstract

“…Over the years, a number of heat transfer analyses have been performed in order to determine the air-side heat transfer coefficient and pressure drop in terms of Colburn j factor and fanning friction factor f. A large number of experiments were performed by Chang and Wang [1], Kim and Bullard [2,3] and Kim et al [4,5] to calculate the air-side heat transfer and pressure drop data. Few investigators opted for the scaled up models for better understanding of flow patterns while others went for the where the eddies and vortices start to appear around the louvers and there is a peak noticed in the Colburn j factor curve at this point and a fall-off of the j factor curve occurs as the Reynolds number is further decreased.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Saleem

Kim

2017

Energies

View full text Add to dashboard Cite

Abstract:The air-side thermal-hydraulic performance of multi-louvered aluminium fin heat exchangers is investigated. A systematic numerical study has been performed to analyze the air-sde thermal hydraulic characteristics over a wide range of Reynolds number i.e., from 30 to 500. Air-side heat transfer coefficient and pressure drop were calculated and validated over the mentioned band of Reynolds numbers. The critical Reynolds number was determined numerically; and also the variation of flow pattern along with the air-side heat transfer coefficient and pressure drop in a multi-louvered heat exchanger associated with Re cri has been reported. Moreover, a parametric study of the multi-louvered aluminium fin heat exchangers was also performed for 36 heat exchanger configurations with the louver angles (19-31 • ); fin pitches (1.0, 1.2, 1.4 mm) and flow depths (16, 20, 24 mm); and the geometric configuration exhibiting the highest air-side heat transfer coefficient was reported. The air-side heat transfer coefficient and pressure drop results for different geometrical configurations were presented in terms of Colburn j factor and Fanning friction factor f ; as a function of Reynolds number based on louver pitch.

show abstract

“…Webb and Jung (1992) studied the application of brazed aluminum heat exchangers to the residential air-conditioner. Chang and Wang (1996) performed experimental studies on the air-side characteristics of louvered fin heat exchangers. Kim and Bullard (2002) measured air-side heat transfer and pressure drop data using 30 different brazed aluminum heat exchangers with different louver fin geometrical parameters.…”

Section: Introductionmentioning

confidence: 99%

Air-side performance evaluation of three types of heat exchangers in dry, wet and periodic frosting conditions

Zhang

Hrnjak

2009

International Journal of Refrigeration

View full text Add to dashboard Cite

The performances of three types of heat exchangers that use the louver fin geometry: 1. parallel flow parallel fin with extruded flat tubes heat exchanger (PF 2 ), 2. parallel flow serpentine fin with extruded flat tubes heat exchanger (PFSF) and 3. round tube wave plate fin heat exchanger (RTPF) have been experimentally studied under dry, wet and frost conditions and results are presented. The parameters quantified include air-side pressure drop, water retention on the surface of the heat changer, capacity for air face velocity 0.9, 2 and 3 m/s, air humidity 70% and 80%. The performances of three types of heat exchanger are compared and the results obtained are presented. The primary goal of this project is to explore the thermal hydraulic performance of PF 2 heat exchanger in refrigeration and heat pump systems. Using both the dip testing method and wind tunnel experiment assess the condensate drainage behavior of the air-side surface of these three heat exchanger types.

show abstract

Air Side Performance of Brazed Aluminum Heat Exchangers

Cited by 74 publications

References 0 publications

R-744 gas cooler model development and validation

R-744 gas cooler model development and validation

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Air-side performance evaluation of three types of heat exchangers in dry, wet and periodic frosting conditions

Contact Info

Product

Resources

About