In the present work, the results of testing panel and box solar cookers are used to investigate the suitability of using the linear regression for estimation of the performance parameters of a solar cooker. The panel cooker and the box cooker were experimentally tested with glycerine and peanut oil, respectively.

An exponential fitting to the plot of measured load temperature versus time is used to derive the linear regression between the instantaneous efficiency and the specific difference of temperature. The linear regression curve is compared with the corresponding experimental curve. Minor deviations are observed in the case of the panel cooker, but only in the middle part of the test. In the case of the box cooker, the deviations are very significant during the whole test. The present work presents the simplified formulation associated with the physical problem. It points out the importance of performing further research to develop a more accurate procedure. The determination of parameters based on the linear regression cannot be seen as a universal procedure applicable to all types of cookers. The opto-thermal ratio and the maximum achievable load temperature are overestimated.

在目前的工作中，测试面板和箱式太阳能炊具的结果用于研究使用线性回归来估计太阳能炊具性能参数的适用性。面板炊具和箱式炊具分别用甘油和花生油进行了实验测试。

对测量的负载温度与时间的关系图的指数拟合用于推导出瞬时效率和特定温度差之间的线性回归。将线性回归曲线与相应的实验曲线进行比较。在面板炊具的情况下观察到微小偏差，但仅在测试的中间部分。就箱式炊具而言，在整个测试过程中，偏差非常显着。目前的工作提出了与物理问题相关的简化公式。它指出了进行进一步研究以开发更准确程序的重要性。不能将基于线性回归的参数确定视为适用于所有类型炊具的通用程序。