Open image in new window Fig. 9 Ratio of the new optimal COP optm and the COP as a function of ratio of heating time and maximum heating time (T a = T c = 25 °C, T e = 0 °C, and T g = 90 °C).
Open image in new window Fig. 7 Energy ratios and efficiency of adsorber-collector as function of the ratio of heating time and maximum heating time (T a = T c = 25 °C, T e = 0 °C, and T g = 90 °C).
Open image in new window Fig. 8 Number of additional adsorbers and ratio of the recovery energy and the useful energy, as a function of the ratio of heating time and maximum heating time (T a = T c = 25 °C, T e = 0 °C, and T g = 90 °C).
The variables of maximum heating power, heating time and nitric acid volume were studied.
Thermal/structural analysis is carried out using ANSYS to obtain the corresponding values of three objective variables, including required heating time, maximum cavity surface temperature difference and maximum von-Mises stress due to thermal expansion, which are used to describe heating efficiency, temperature uniformity and mold strength, respectively, for different sets of design variables.
The pretreatment temperature was controlled at 151 °C, the heating time to maximum temperature was 10 min, and pretreatment time at the maximum temperature was set to 20 min.
The pretreatment temperature was controlled at 210°C, the heating time to maximum temperature was 100 minutes, and pretreatment time at the maximum temperature was set to 20 minutes.
Beginning with a general thermal model of the cell, we develop and evaluate limiting cases that allow closed-form analytical solutions of the time-varying temperature fields, from which heating time and maximum temperature gradient are calculated.
The time of maximum heating power was essential to obtain a desired RCC.
The influence in the determination of the subcooling of experimental conditions such as the cooling rate, the maximum heating temperature, and the holding time at the maximum temperature has been researched.
Given the maximum heating power and the total operation time, F h is 0.274, 0.267 and 0.299 for 2,000, 2,500 and 3,000 DD, respectively.
