Waste heat recovery is one of the crucial and fundamental issue of energy management related with energy efficiency improvement, fuel savings, and reduction of greenhouse gases emissions. The paper provides with the experimentation of the prototype heat recovery system dedicated to the small and mid-sized maritime combustion engines of the nominal load of 100-250 kW. The waste heat recovery system is covering the innovative low-pressure steam indirect heat transfer subsystem. The recovered heat is consumed by a heating system and a prototype heat driven ejector refrigeration cycle operating with environmentally safe refrigerant. It was demonstrated that the refrigeration system produces up to 30 kW of cold by consuming 75 kW of heat gathered from flue gases. This is the first prototype of the compact heat driven refrigeration system for marine applications. The waste heat recovery system additionally provides with approximately 60 kW heat recovered from water jacked cooling of the engine block which is used for heating capacity dedicated for tap water and space heating purposes. This covers almost all small and mid-sized vessels needs for thermal energy. The prototype design has been approved by two independent maritime classification societies.

废热回收是能源管理中至关重要的基本问题之一，与提高能源效率，节省燃料和减少温室气体排放有关。本文提供了专用于标称负荷为100-250 kW的中小型海上燃烧发动机的原型热回收系统的实验。废热回收系统涵盖了创新的低压蒸汽间接传热子系统。回收的热量由加热系统和与环境安全的制冷剂一起运行的原型热驱动喷射器制冷循环消耗。事实证明，制冷系统通过消耗从烟道气中收集的75 kW热量产生高达30 kW的冷量。这是用于船舶应用的紧凑型热驱动制冷系统的第一个原型。废热回收系统还提供了从发动机缸体的顶水冷却中回收的大约60 kW的热量，该热量用于专门用于自来水和空间加热的加热能力。这几乎涵盖了所有中小型船舶对热能的需求。原型设计已被两个独立的海事船级社批准。