Introduction

ABSTRACT

The article considers the question of movement of cooled air by opening the cell doors of a domestic refrigerator. The object of research is the characteristics of the flow of cooling air, which include the velocity vector of the flow. The actual flow of air flowing out of the refrigerator compartment is three-dimensional, ie, it is characterized at each point in the flow values of the longitudinal, transverse and vertical projections of the velocity, pressure, temperature, viscosity, specific heat, thermal conductivity. To solve this problem, we used data of field tests, which led to some simplifications in the mathematical description of the process of movement of cooled air without compromising reliability and objectivity of the obtained patterns. The studies were obtained according to determination the projections of the velocity vector of the flow of cool air coming out of the refrigerating compartment of the refrigerator when the door is open at different temperatures within the chambers and the surrounding air, which allows to estimate the heat loss associated with the replacement of the cooled air warmer when you open the cell doors of domestic refrigerator.

Keywords: household refrigerator, the movement of cooled air, heat and mass transfer, energy.

Improvement of household refrigeration appliances include tasks to increase their performance in the operation of thermal power. Consumption compression refrigerator, along with other operational factors, depends on the heat exchange and mass transfer processes internal chambers with the environment.

When you open the cell doors of the refrigerator, as it is known, are replaced by warm ambient air cooled air in the chambers of refrigeration and freezer compartments.

This substitution causes the cost of running a sealed unit of the refrigerator and its power consumption. Assess the extent of this substitution, we can study the process of heat and mass transfer of air in the chambers of the refrigerator with the ambient air. For this it is necessary to identify the characteristics of the flow of air flowing out of the open door of the refrigerator chamber and examine the changes in the characteristics of the flow in time. After studying the conditions and characteristics of the formation of the flow under consideration, it is possible to determine the heat loss caused by opening the door for a variety of design solutions cabinet BHP and develop recommendations to reduce them.

The object of research is the flow of cooled air flowing out of the chamber household refrigeration appliance when opening the door of a household refrigerator. The actual flow of air flowing out of the refrigerator compartment is three-dimensional, ie, it is characterized at each point in the flow values ​​of the longitudinal, transverse and vertical projections of the velocity, pressure, temperature, viscosity, specific heat, thermal conductivity.

Дата добавления: 2015-07-02