Recent built low energy school buildings have adopted a novel heat recovery heat pump and classroom ventilation system. School building energy conservation performance and classroom air quality enhancement will be simultaneously investigated in the present work. Heat recovery efficiency of the...

Quantitative reliability assessment of photovoltaic (PV) power system is an indispensable technology to assure reliable and utility-friendly integration of PV generation. This paper reviews the state-of-the-art technologies for evaluating the reliability of large-scale PV systems and the effect...

An opposed hydraulic free piston engine is under design at the Tianjin University in China because of the advantages of this engine compared to the conventional engine. The main challenges presented by such engines are the control of the piston motion and synchronization. This study investigates...

A novel common-rail type DME injector has been proposed by State Key Laboratory of Engines. The injector employs impact principle to enlarge its electromagnetic force, and thus has no plunger matching parts. The sealing and wear problems brought by plunger can be avoided when the injector...

An opposed-piston hydraulic free piston engine operating with homogenous charge compression ignition (HCCI) combustion, has been proposed by State Key Laboratory of Engines as a means of significantly improving the IC engine’s cycle thermal efficiency and lowering exhaust emissions. Single and...

Knocking combustion in spark-ignition (SI) engines is an abnormal combustion phenomenon which can constrain the engine performance and thermal efficiency. It can also result in severe permanent engine damage under certain operating conditions. This paper systematically reviews the engine knock...

To evaluate the sustainability of systems that draw power from electrical grids there is a need to rapidly and accurately quantify pollutant emissions associated with power generation. Air emissions resulting from electricity generation vary widely among power plants based on the types of fuel...

A micro Newcomen engine is proposed. To overcome the problems of friction and leakage of the micro mechanical parts during engine's operation, we use a flexible ripple tube to integrate piston and cylinder into one monolithic part. Heptane is used as the working fluid, and it works in the...