Finding the cheaper alternative fuels and shortening the rendang cooking time are the potential efforts to reduce the production cost of rendang. This study aims to use low-rank cheap coal to cook beef rendang and to develop a more efficient rendang cooking method. First, the raw coals were carbonized, then the charcoals obtained were crushed and mixed with the filler and binder. After that, the charcoal mixture was molded into briquettes. Furthermore, the carbonized coal briquettes resulted were characterized and used as fuel to cook beef rendang in a semi-closed moveable-grate stove. To get a more efficient cooking time, a modified cooking method was developed. From the research has been obtained that there was almost no significant odor and smoke emissions during the cooking process except at the initial ignition period, which takes between 10-15 minutes. The modified cooking method took time 3 hours to get the dry beef rendang, 1 hour shorter than that of the normal cooking ones. Briquettes consumption for 1 kg of beef rendang cooking, using the modified cooking method, was about 0.75 kg, equivalent to USD 0.18 if 1 kg of briquette is priced USD 0.24. Finally, it can be summarized that carbonized coal briquette is a solid smokeless fuel that is safe and cheap to cook beef rendang.

寻找更便宜的替代燃料和缩短仁当烹饪时间是降低仁当生产成本的潜在努力。本研究旨在利用低阶廉价煤烹制仁当牛肉，并开发一种更高效的仁当烹制方法。首先将原煤炭化，然后将得到的木炭粉碎并与填料和粘合剂混合。之后，将木炭混合物模制成煤球。此外，对所得的碳化型煤进行了表征，并将其用作燃料，在半封闭的活动炉排炉中烹制仁当牛肉。为了获得更有效的烹饪时间，开发了一种改进的烹饪方法。研究发现，在烹调过程中，除了最初的点火阶段外，几乎没有明显的气味和烟雾排放，这需要10-15分钟。改良的烹调方法需要 3 小时才能得到干牛肉仁当，比普通烹调方法缩短了 1 小时。使用改良的烹调方法烹制 1 公斤仁当牛肉时的煤球消耗量约为 0.75 公斤，如果 1 公斤煤球的价格为 0.24 美元，则相当于 0.18 美元。最后总结一下，炭化型煤是一种固体无烟燃料，烹制仁当牛肉既安全又便宜。