A new heat transfer correlation for natural draft wire-on-tube condensers for a broad geometry span

Espíndola, Rodolfo S.; Boeng, Joel; Knabben, Fernando T.; Hermes, Christian J.L.

doi:10.1016/j.ijrefrig.2020.02.025

Cited by 11 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the present study, the refrigerator walls have been considered vertical and horizontal plates. For vertical plate walls, if the Rayleigh number ≤ 10 � , the Nu number can be computed as [14,17,21]:…”

Section: The Mathematical Model For the Cop Evaluationmentioning

confidence: 99%

Experimental COP evaluation of a 65-litre household refrigerator running with R600a

et al. 2021

View full text Add to dashboard Cite

A household refrigerator is a major energy consumer in all homes. The paper aims to evaluate based, on experimental data, the COP of a 65-liter household refrigerator operating with R600a. The main components and instrumentation of the experimental setup are presented. A mathematical model based on the energy balance of the refrigerated enclosure is developed in order to evaluate the COP. Three experimental data sets have been obtained in quasi-steady-state operating conditions. The results point out that the compressor power absorbed from the grid was 60 [W]. The maximum value for the cooling capacity is 81.73 W while the minimum value is 80.24 W. In terms of COP, the maximum value obtained is 1.362, while the minimum one is 1.337. The COP values obtained in the present study are in good agreement with the ones displayed by the manufacturer in the compressor datasheet. Future development is discussed.

show abstract

Section: The Mathematical Model For the Cop Evaluationmentioning

confidence: 99%

Experimental COP evaluation of a 65-litre household refrigerator running with R600a

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Later, heat transfer modes of radiation and natural convection from wire-on-tube heat exchanger have been studied in which the radiation considers all interactions between the surface and the surrounding environment [8]. Following this experimental study, some refrigeration research aiming at formulating the correlation on the air-side heat transfer coefficient in natural convection-based wire and tube heat exchanger has developed, including for a single-layer and a multiple-layer wire and tube [9][10][11][12], oscillating heat tubes [13], and wire-woven heat exchanger [14].…”

Section: Introductionmentioning

confidence: 99%

Design, Performance, and Optimization of the Wire and Tube Heat Exchanger

Arsana¹,

Wahyuono²

2022

Heat Exchangers

View full text Add to dashboard Cite

The wire and tube heat exchanger has been mostly utilized as a condenser unit in various refrigeration systems. As a class of extended surface-based heat exchanger, not only the operating condition but also the geometry of the wire and tube heat exchanger plays a critical role in determining the overall performance of the heat exchanger. Despite the fact that the current designs that include the inline, single-staggered, and woven matrix-based wire and tube heat exchangers already exhibits positive performance, future design and optimization remain challenging from the thermal and fluids engineering point of view. To guide the optimization strategy in the heat exchanger design, this chapter provides an insight into how the geometrical design impacts the performance of various wire and tube heat exchangers, which can be deduced from either the heat exchanger capacity or efficiency.

show abstract

“…Therefore, the studies of wire-on-tube heat exchangers focused on optimization are limited. In the domestic refrigeration industry, one of the most widely used heat exchanger designs is the wire-on-tube heat exchanger design, mainly due to its low cost and ease of manufacture [24].…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimization of a Multilayer Wire-on-Tube Condenser: Case Study R134a, R600a, and R513A

et al. 2022

View full text Add to dashboard Cite

This study presents the optimization of a multilayer wire-on-tube condenser exposed to forced convection, using the Optimized Multi-objective Particle Swarm Optimization (OMOPSO) algorithm. The maximization of the heat transfer and the minimization of the heat exchange area were defined as objective functions. In the optimization process, the variations of eight geometric parameters of the condenser were analyzed, and the Multi-objective Evolutionary Algorithm based on Decomposition (MOEAD), Non-dominated Sorting Genetic Algorithm-II (NSGAII), and OMOPSO algorithms were statistically explored. Furthermore, the condenser optimization analysis was extended to the use of alternative refrigerants to R134a such as R600a and R513A. Among the relevant results, it can be commented that the OMOPSO algorithm presented the best option from the statistical point of view compared to the other two algorithms. Thus, optimal designs for the wire-on-tube condenser were defined for three proposed study cases and for each refrigerant, providing an overview of compact designs. Likewise, the reduction of the condenser area was analyzed in more detail, presenting a maximum reduction of 15% for the use of R134a compared to for the current design. Finally, the crossflow condition was studied with respect to the current one, concluding in a greater heat transfer and a smaller heat exchange surface.

show abstract

A new heat transfer correlation for natural draft wire-on-tube condensers for a broad geometry span

Cited by 11 publications

References 5 publications

Experimental COP evaluation of a 65-litre household refrigerator running with R600a

Experimental COP evaluation of a 65-litre household refrigerator running with R600a

Design, Performance, and Optimization of the Wire and Tube Heat Exchanger

Multi-Objective Optimization of a Multilayer Wire-on-Tube Condenser: Case Study R134a, R600a, and R513A

Contact Info

Product

Resources

About