Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Thermal Analysis of the Manning S-4000 Portable Wastewater Sampler.
Author Lin, Philip C. L. ;
CORP Author Environmental Monitoring and Support Lab.-Cincinnati, OH.
Year Published 1980
Report Number EPA-600/4-80-045;
Stock Number PB81-111858
Additional Subjects Automatic control equipment ; Waste water ; Samplers ; Cooling systems ; Mathematical models ; Design ; Temperature ; Preserving ; Heat transfer ; Feasibility ; Portable equipment ;
Library Call Number Additional Info Location Last
NTIS  PB81-111858 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 44p
This study investigated the feasibility of mathematically designing a portable sampler with an ice compartment for the preservation of samples collected in sequence automatically at about 4C for a 24-hour period under certain environmental conditions, specifically 35C for both the ambient temperature and the samples. A Manning S-4000 sampler was selected in this study. A mathematical model to simulate the sample cooling process was developed and experimental measurements on the sampler cooling system were also conducted. The experimental results indicated that about 80 to 96 percent of the cooling capacity of the sampler was lost to the surroundings. A modified cooling system is suggested in this report. The new system has a cooling capacity to lower 24 500-ml samples to about 4C at a cycle time of 1 hour and a temperature of 35C for both the surroundings and the initial samples over a 24-hour period.