---

  Mass transfer between packaging and its contents during the storage mainly affects physical and chemical properties of foods. Possible interaction between HDPE container and soft drink basis was studied in this work. GC-HS analysis was applied to identify the possible reactants of HDPE. Basis packaged in HDPE containers was stored at different storage temperatures; 4, 25 and 48˚C. Specific migration of n-Octane as possible reactant was determined by headspace chromatography coupled with mass spectrometer. Quality parameters of basis were measured during storage time at different temperatures. N-Octane was not detected in the samples stored at 4 and 25˚C, and at 48˚C was 0.7ppb, which is much smaller than permitted level of FDA (300ppm). The best storage condition was recognized at HDPE container and darkness condition in 4˚C. So the temperature was recognized as an important attribute in basis storage.

---

The performance of a cogeneration cycle with various working fluids is investigated and optimized with an economic approach. Exergy and exergoeconomic models are developed to investigate the thermodynamic performance of the cycle, and to assess the cost of products. In this study, the dynamic model would be registered to search the system behavior during a day. In this study, hydrogen production rate optimal design (HPROD) refrigeration power optimal design (RPOD) and cost optimal design (COD) are considered for analysis and optimization. According to recent parametric studies, boiler, turbine and condensation temperature and turbine inlet pressure affect the unit cost of products significantly. The results show the carbon dioxide and n-octane has a better operation to produce of hydrogen and refrigeration power among other working fluids, respectively. It is observed that, in carbon dioxide cycle, the SUCP is decreased by 8.5% when hydrogen production rate is decreased from 1.811 lit/s to 1.757 lit/s, therefore, in n-octane cycle, SUCP is decreased by 47.4% when refrigeration power is decreased from 9.599 KW to 6.622 KW. The evaluation of exergy destruction demonstrates in which the condenser has the highest exergy destruction, therefore, its rate in COD case is the lowest among the three other states. The results indicate, in carbon dioxide and n-octane cycles, the total exergy destruction and the investment cost rates in the RPOD case is higher than any other cases.