This study analyzed the variation law of engine exhaust energy under various operating conditions to improve the thermal efficiency and fuel economy of diesel engines. An organic Rankine cycle (ORC) waste heat recovery system with internal heat exchanger (IHE) was designed to recover waste heat...

A dual loop organic Rankine cycle (DORC) system is designed to recover waste heat from a heavy-duty compressed natural gas engine (CNGE), and the performance of the DORC–CNGE combined system is simulated and discussed. The DORC system includes high-temperature (HT) and low-temperature (LT)...

In order to study factors affecting lean combustion limit, an experimental study was carried out on a spark- ignited engine fueled with compressed natural gas and hydrogen blends. Effects of ignition timing, hydrogen fraction, engine speed, throttle opening, coolant and oil temperature were...

Aiming at the recovery of exhaust energy for a diesel engine, a set of ORC (organic Rankine cycle) system is designed. The characteristics of the exhaust gas under various operating conditions are studied through experiment. Based on experimental results and theoretical calculation, effects of...

In the current research, the efficiency of a hybrid renewable system consisting of a solar parabolic trough collector and the organic Rankine (PTC- ORC) is evaluated. Moreover, the effect of using the photovoltaic module in this coupled system (PTC-PV-ORC) is poked. Due to analyzing the...

Evacuated solar collectors are systems that provide a considerable quantity of heat. However, this system is unable to provide energy in the absence of sunlight. Thus, this study attempts to numerically study a Solar Evacuated Tube Collector (ETC) performance using phase change materials (PCM)....

The effect of the cold wall with different wall distances on ignition at low temperatures is complex and systematic analyses are still needed. Therefore, this work numerically reveals the effect mechanism of wall distance on the spray and ignition characteristics for the diesel engines. In which...

Heavy-duty diesel engines are prone to knocking combustion and even cause piston ablation failures at low temperatures, but the mechanism is not clear. Thus, the above issues are clarified through CONVERGE simulation and transient wall temperature measurement. The results show that local...

A fin-and-tube evaporator can be used for an ORC (organic Rankine cycle) to collect waste heat of the exhaust gas of an internal combustion engine. In this paper, the thermal-hydraulic characteristics of an ORC evaporator are analyzed using a CFD method. A 3D numerical model is derived from an...