| Main Title |
Warm-Liquid Defrost for Commercial Food Display Cases: Experimental Investigation at 32.2 degree Condensing. |
| Author |
Gage, C. L. ;
Kazachki, G. S. ;
|
| CORP Author |
ARCADIS Geraghty and Miller, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. |
| Publisher |
2002 |
| Year Published |
2002 |
| Report Number |
EPA/600/A-02/086 ; NRMRL-RTP-P-681 |
| Stock Number |
PB2002-107527 |
| Additional Subjects |
Food storage ;
Display devices ;
Refrigeration ;
Defrosting ;
Commercial equipment ;
Display systems ;
Condensers(Liquifiers) ;
Commercial refrigeration ;
Tests ;
Test equipment ;
Evaporation ;
Temperature ;
Temperature measurement ;
Air pollution monitoring ;
Air pollution control ;
Warm-liquid defrost(WLD) ;
Electric defrost(ED)
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB2002-107527 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
14p |
| Abstract |
The paper gives results of an experimental investigation at 32.2 C condensing of warm-liquid defrost for commercial food display cases. A refrigeration test rig with two open cases and two reach-in cases was tested using warm-liquid defrost (WLD) at -34.4 C evaporating, 32.2 C condensing, and 4.4 K subcooling below the condensing temperature. Results were compared to electric defrost (ED) at the same conditions. For all cases, WLD at 32.2 C condensing performed as well as ED (e.g, coils reached comparable temperatures at the end of defrost). For the open cases where defrost times were comparable, WLD causes a 1 K smaller rise in product temperature than is observed with ED. For the reach-in cases, defrost time for the WLD was 1 hour, compared to 35 minutes for ED. As a result of the longer defrost time, the product temperature was higher by 1.7 K with WLD than with ED. Increasing the flow rate of the liquid would shorten the defrost time and improved the product conditions. |
| Supplementary Notes |
Sponsored by Environmental Protection Agency, Research Triangle Park, NC. |
| Availability Notes |
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| Category Codes |
98H; 68A |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/13 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
029500590 |
| Origin |
NTIS |
| Type |
CAT |
