Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL MEASUREMENT OF ADIABATIC CAPILLARY TUBE PERFORMANCE ON A VAPOR COMPRESSION REFRIGERATION CYCLE
Submission Author:
Gerson K. K. Shimizu , SP
Co-Authors:
Cristiano Tibiriçá
Presenter: Cristiano Tibiriçá
doi://10.26678/ABCM.ENCIT2016.CIT2016-0030
Abstract
A test facility composed of vapor-compression refrigeration cycle has been built for the investigation of the performance of adiabatic capillary tubes as expansion devices. This test facility has a compressor, a forced air circulation condenser, and an evaporator inside liquid tank for determination of the cooling effect. Experiments were conducted for R134a, capillary tube internal diameter of 0.8 mm and lengths of 1.5m, 2 m, 2,5 m and 3 m. For each experimental condition, the inlet and outlet thermodynamic state of the capillary tube were recorded together with the mass flow. The mass flow was evaluated based on an energy balance along the evaporator considering the cooling effect in the evaporator. Prediction methods from the literature were compared with the experimental data allowing identification of the most accurate methods for prediction capillary tube performance in adiabatic condition.
Keywords
