Effect of refrigerant charge, duct leakage, and evaporator air flow on the high temerature performance of air conditioners and heat pumps /
-27% to +27% charging range, the capacity and EER changed
| Main Author: | |
|---|---|
| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
|
| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | -27% to +27% charging range, the capacity and EER changed (SHR) with increasing leakage showed perhaps the most air leakage tests. For the charging tests, the indoor room An experimental study was conducted to quantify the effect of charge than it was for the TXV unit. For the TXV unit on the charge, reduced evaporator airflow, and return air leakage conditions were 80'F (27.8'C) dry-bulb and 50% relative decreased as expected. However, the drop was not as detrimental effect of return air leakage on performance, EER dropped more than 25%. Return air leakage from hot attic evaporator airflow decreased, the capacity and EER both for the reduced evaporator airflow, and one for the return for this research: two of them for the charging tests, two from hot attic spaces. There were five sets of tests used humidity. The outdoor conditions ranged from 95'F (350C) all increased return air leakage. However, power consumption was indoor air at normal conditions with the attic air at high installation items were: improper amount of refrigerant levels ranged from -36% charging to +27% charging. little with charge. A TXV unit and a short-tube orifice unit of 50% reduced evaporator airflow, neither unit's capacity or Performance was quantified with the following variables: relatively constant for all variables except outdoor return air leakage. The increase in sensible heat ratio several installation items on the high outdoor ambient significant as with the charging tests. For the extreme case spaces was simulated by assuming adiabatic mixing of the temperature performance of air conditioners. These temperature, which meant that for the same power consumption, temperatures. Effective capacity and EER both decreased with the environment. The performance of the orifice unit was more sensitive to the unit delivered much lower performance when there was the way up to 120'F (48.9'C). Charge levels ranged from 30% total capacity, energy efficiency ratio (EER), and power. undercharged to 40% overcharged for the short-tube orifice unit. For the thermal expansion valve (TXV) unit, charge were also tested for reduced evaporator airflow. As which was the inability of the unit to absorb moisture from |
|---|---|
| Item Description: | "Major subject: Mechanical Engineering". Vita. |
| Physical Description: | xvii, 108 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |