In the current study, a domestic diesel electricity generator based new thermoelectric cogeneration system is studied with a 20% blend of mahua biodiesel fuel. The exhaust of the engine is considered as the heat source with the rectangular configuration geometry of the exhaust pipe, for heating water and producing electricity using thermoelectric generators. A thermal resistance model is developed for five cases at different positions for thermoelectric generators. The comparative study revealed that in Case 5, the maximum power of 35 W is obtained in which the TEGs are assembled with the inner wall of the rectangular exhaust configuration near to the heat source. However, the heat recovery unit could produce water temperatures up to 93°C. Furthermore, evaluation of the payback period and savings in cost by operating the cogeneration system has been done for all considered configurations of TEG based cogeneration systems. The theoretical analysis revealed that out of all the considered Cases, Case-5, TEGs near to the heat source, provides the best balance between the power and initial cost at sufficient water temperature. Furthermore, the study extends to the environmental impact of the cogeneration systems for the estimations of the CO₂ saved by the waste heat.

在当前的研究中，研究了一种基于家用柴油发电机的新型热电热电联产系统，其中掺入了20％的麻花生物柴油燃料。发动机的废气被认为是具有矩形排气管几何形状的热源，用于加热水并使用热电发电机发电。针对热电发电机在不同位置的五种情况开发了热阻模型。比较研究表明，在情况5中，当TEG与矩形排气结构的内壁靠近热源组装在一起时，获得的最大功率为35W。但是，热回收单元可能产生的水温高达93°C。此外，对于所有考虑的基于TEG的热电联产系统的配置，已经通过运行热电联产系统对投资回收期和成本节省进行了评估。理论分析表明，在所有考虑的案例中，案例5，靠近热源的TEG在足够的水温下都能在功率和初始成本之间实现最佳平衡。此外，该研究还扩展了热电联产系统对CO估算的环境影响。₂通过废热节省。