Convective boiling of ammonia and Freon 22 in plate heat exchangers
Abstract
An Alfa-Laval plate heat exchanger, previously used as a small ocean thermal energy conversion (OTEC) evaporator, was refurbished and tested. Several series of tests were carried out with ammonia as the working fluid, followed by one with Freon 22. Configurations utilizing all high angle plates and all low angle plates, and alternate high and low angle plates, were tested to determine the optimum combination for OTEC applications. The effects of ammonia contaminated by water on the thermal performance of the heat exchanger were evaluated. The use of the Linde High-Flux Surface on the working-fluid side of a Transfer plate heat exchanger was investigated to determine its effect on performance.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1983
- Bibcode:
- 1983STIN...8334257P
- Keywords:
-
- Ammonia;
- Boiling;
- Convective Heat Transfer;
- Freon;
- Heat Exchangers;
- Ocean Thermal Energy Conversion;
- Contamination;
- Evaluation;
- Metal Plates;
- Optimization;
- Performance Tests;
- Water;
- Fluid Mechanics and Heat Transfer