SYSTEM PERFORMANCE-CHARACTERISTICS OF AN AIR-CONDITIONER OVER A RANGE OF CHARGING CONDITIONS

被引：27

作者：

FARZAD, M

ONEAL, DL

机构：

[1] Energy Systems Laboratory, Department of Mechanical Engineering, Texas A and M University, College Station

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 1991年 / 14卷 / 06期

关键词：

RESIDENTIAL AIR CONDITIONERS; CHARGING CONDITIONS; ENERGY EFFICIENCY RATIO;

D O I：

10.1016/0140-7007(91)90027-E

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A popular type of residential air conditioner in the USA is the split system. These systems have an outdoor unit which houses the condenser, condenser fan, compressor and controls. A separate indoor unit houses the evaporator, expansion device and evaporator blower. As the refrigerant charge of these systems is adjusted during field installation, the potential exists for not setting the charge exactly to the manufacturer's specifications. The objective of the work reported here was to quantify the influence of the refrigerant charge on the steady-state and cyclic operation of a residential split-system air conditioner. A 3 ton unit with capillary tube expansion was tested. The charge was systematically varied to determine its effect on system variables such as capacity, flow-rate, evaporator superheat, power consumption and seasonal energy efficiency ratio (SEER). The results indicated a larger degradation in capacity for undercharging than for overcharging at a given temperature. However, the trends in capacity as a function of temperature for undercharging were different from those for overcharging. The difference in trends was found by close examination of the refrigerant flow control provided by the capillary tube. Other results indicated that small amounts (5%) of undercharging caused as much as a 6% drop in the SEER.

引用

页码：321 / 328

页数：8

共 12 条

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