| Main Title |
Investigation of Ammonia Equipment Configurations for Supermarket Refrigeration Applications (for Microcomputers). |
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. |
| Publisher |
Feb 95 |
| Year Published |
1995 |
| Report Number |
EPA/SW/DK-95/028; |
| Stock Number |
PB95-502555 |
| Additional Subjects |
Data file ;
Computer software ;
Refrigerants ;
Ammonia ;
Environmental chemical substitutes ;
Refrigerating machinery ;
Computerized simulation ;
Models ;
Thermodynamics ;
Transport properties ;
Diskette ;
Supermarket refrigeration
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB95-502555 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
1 diskette |
| Abstract |
This product gives results of a project to quantify the advantages and disadvantages of using ammonia with a secondary brine refrigerant compared to R-22 in supermarket refrigeration applications. Project objectives were achieved by numerical experiments using simulations. Mechanistic models of refrigeration system components were used, based on fundamental principles, accepted heat transfer/pressure drop correlations, and available manufacturers' data. Available thermodynamic and transport property data correlations for ammonia and R-22 were used in the models. The parameters of these models were varied to determine their effect on system performance and locate optimum values. A modular approach was used in which each component was separately modeled, allowing simple changes in system configurations. The combined component models resulted in a large set of coupled nonlinear algebraic equations for the quasi-steady systems that did not involve brine storage. The system involved differential and algebraic equations. These equations were solved using the general-purpose simulation programs EES and TRNSYS. EES is a robust nonlinear equation-solving program with built-in thermophysical property data. TRNSYS is a sequential modular simulation program that uses schemes to solve coupled algebraic and differential equations. |
| Supplementary Notes |
Executable files, contains Source Code. Files are compressed. |
| Availability Notes |
The software is on one 3 1/2 inch DOS diskette, 1.44M high density. File format: EES/FORTRAN. Documentation included; may be ordered separately as PB95-210662. |
| NTIS Title Notes |
Software. |
| Category Codes |
94#; 68A; 97J; 97R |
| NTIS Prices |
CP D02 |
| Primary Description |
600/13 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
521408810 |
| Origin |
NTIS |
| Type |
CAT |
