The Design on the Distributor of a Falling Film Evaporator

Shih, Yang-Cheng; Wun, Chain-Hao; Wu, Hua-Lin; Chao, Ling-Yu; Shih, Shih-Hao

doi:10.1615/tfec2017.itc.018317

Cited by 1 publication

(1 citation statement)

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“…Additional baffles in an open system produce more pressure drop than in a closed system (Wang et al., 2017). These additional baffles help to restrict the movement of liquid refrigerant particles with vapor moment to suction in the distributor (Jin et al., 2019; Li et al., 2017; Shih et al., 2017).…”

Section: Resultsmentioning

confidence: 99%

Experimental investigation on the effect of liquid phase and vapor phase separation over performance of falling film evaporator

Anjankar

Lakade

Padalkar

et al. 2022

Environmental Quality Mgmt

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Energy, cost, and environmental concerns play a vital role in understanding governing parameters of distributor design in falling film evaporators. Distributor design is a hidden parameter in many experimental papers. The uniform distribution of liquid refrigerant over the tube bundle mostly depends on two‐phase liquid refrigerant and vapor refrigerant. This work conducted experiments with two distribution systems with and without separation of liquid‐vapor refrigerant after expansion valve for the same evaporator capacity with R134a as a refrigerant. Results reveal that; separating vapor refrigerant has a positive impact on the approach of the evaporator with an open system distributor arrangement. The highest delta T and lowest practice are found at a heat flux of 13.97 kW/m2 with an available system distributor compared to a closed system with a heat flux of 14.25 kW/m2. The open system arrangement in the distributor is the novel parameter for distributor design, ensuring uniform distribution with minimum pressure drop and dry suction. An open system distributor has an average 16.1% capacity increase over a closed system. The experimental analysis helps to understand different parameters for the design of distributors in falling film evaporators for uniform distribution.

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