The pressure drop and heat transfer characteristics of condensation flow with hydrocarbon mixtures in a spiral pipe under static and heaving conditions. (July 2019)

• Record Type: Journal Article
• Authors: Li, Shulei; Cai, Weihua; Jiang, Yiqiang; Zhang, Haochun; Li, Fengzhi
• Is Part Of: International journal of refrigeration. Volume 103(2019)
• Page Start: 16
• Page End: 31
• Publication Date: 2019-07
• Subjects: Spiral pipe -- Hydrocarbon mixtures -- Condensation heat transfer -- Pressure drop -- Heaving condition; Tube en spirale -- Mélanges d'hydrocarbures -- Transfert de chaleur par condensation -- Chute de pression -- Condition de soulèvement; Refrigeration and refrigerating machinery -- Periodicals; 621.56
• DOI: 10.1016/j.ijrefrig.2019.03.027
• Languages: English
• ISSNs: 0140-7007

Abstract

Highlights: Hydrocarbon mixtures condensation flow was investigated at heaving condition. The simulation results coincided to experimental ones with ±15% error. The impacts of various parameters on pressure drop and heat transfer were discussed. Methane/ethane mixture had the best heat transfer and the smallest pressure drop. It showed better performance at heaving condition than static one. Abstract: A model based on ASNYS CFX was established to explore the pressure drop and heat transfer characteristics of condensation flow with hydrocarbon mixtures in a spiral pipe under static and heaving conditions, whose deviations are within ±15% compared to experimental ones. It considered the effects of motion parameters, operating parameters and structural parameters on frictional pressure drop and heat transfer coefficient for three hydrocarbon mixtures. The ranges of mass flux, vapor quality, heat flux, saturation pressure, hydraulic diameter, curvature diameter and inclination angle were 200–800 kg/(m 2 ·s), 0.3–0.9, 10–20 kW/m 2, 2–4 MPa, 6–14 mm, 1.6–2.4 m and 6–14°, respectively. The results demonstrate that methane/ethane mixture has the best heat transfer and the smallest pressure drop among three mixtures. At static condition, as the vapor quality and mass flux increase and the saturation pressure and hydraulic diameter decrease, there are evident increases in heat transfer and pressure drop, whereas the impacts of curvature diameter, inclination angle and heat flux on them are insignificant. Meanwhile, the heaving motion affects pressure drop and heat transfer and makes it show better overall heat transfer performances, where the comprehensive heat transfer factors ( CHFs ) of 83.33% data points are more than 1. Further, the heaving effects increase with the increasing heaving amplitude and the decreasing heaving cycle.