Energy and environmental enhancement of power generation units by means of zero‐flow coolant strategy

Abstract

Summary Warm‐up period is considered as the most critical phase in the operation of any device that converts the energy of a fuel into heat, electricity, and other products, including power generation units since the system efficiency and environmental pollution levels are much worse than the normal operation in that phase. Considering this point, in this study, applying the zero‐flow coolant strategy to reduce the warm‐up period is suggested for power generation units and it is investigated in details. An internal combustion engine is selected as the case‐study and implementation of the method to enhance the performance of that from both energy and environmental aspects are studied comprehensively. As the results show, for the investigated engine, which has a capacity of 1.8 L, implementation of the method leads to 17% decrease in the warm‐up period. It is accompanied by 9.32% and 2.23% improvement in the amount of unburned hydrocarbon emission and fuel consumption. Moreover, based on the conducted discussion, despite other available methods to enhance systems that consume fuel, the method is so practical that it could be employed simply in an energy system without imposing a huge cost, which is taken into account as a significant advantage.

A smart load-speed sensitive cooling map to have a high- performance thermal management system in an internal combustion engine

“…As seen, the maximum temperature in both cases without boiling assumption is approximately 170 C, which is equal to 140 C when boiling effects are taken into account, and it leads to having a much greater engine performance. Moreover, based on the methodology presented in the references [22,33], the improvement in fuel consumption, hydrocarbon emission production, and needed power of the coolant pump has been computed for both conventional and smart cooling system, which shows that on average, they are enhanced by 2.1, 8.6, and 44.3%, respectively.…”

“…Electric pumps becoming increasingly popular with the advancement of the electronics industry can be controlled by the engine control unit regardless of engine speed. It can bring benefits to engine performance, such as improving the engine warm-up condition [22], which can reduce fuel consumption and emissions during cold-start [23]. Moreover, the size of the cooling system becomes smaller, which is taken into account as another advantage of the electric pumps compared to the mechanical ones.…”

Three Dimensional Simulation of Oil Flow Characteristics in Lubrication System of Rotary Tillage Engine

“…A2 is the area at the overcurrent section 2, m 2 . Available: (8) Solving equations: (9) in which, . Cv is the velocity coefficient, and it is determined by experiments that Cv=0.96-0.98.…”

“…It can be proved that the oil pump can be simulated by 3D fluid simulation software when selecting or optimizing the oil pump. Flowmaster software can call models with different complexity in different internal combustion engine lubrication systems, and build and show the interaction of diesel engine fluid systems through these models, and then use one-dimensional fluid simulation software to complete different design tasks (Samiezadeh S. et al, 2021). When studying the oil pump and lubricating oil circuit, the researchers used the three-dimensional model of external gear pump and flow pulsation for experimental evaluation.…”