Thermal-energy storage systems consisting of multiple tanks allow the implementation thermocline-control methods, which can reduce drop in outflow temperature during discharging and increase volumetric density utilization factor. Multi-tank based on extraction mixing methods were assessed using simulations assuming fluvial rocks as material compressed air heat-transfer fluid. For adiabatic cond...

Compressed air is typically one of the most expensive utilities in an industrial facility. As a result, potential savings opportunities are aggressively sought out and identified. Once identified, projected energy savings must be calculated in order to justify the cost of implementing the savings opportunity. It is important to calculate projected energy and cost savings as accurately as possib...

Due to development of the demand increasing of energy around the world and the decline of traditional energy sources in electricity generation the development orientation of power generation has been toward renewable energies. The use of these unfailing and renewable resources requires study substrates and new infrastructure in the transmission and distribution networks. Due to the power instab...

The performance and design criteria of air powered multistage turbines are studied thermodynamically in this paper. In-house code is developed in the C++ environment and the characteristics of four-stage turbines with inter-heating are analyzed in terms of maximum thermal efficiency, maximum exergy efficiency and maximum work output over the inlet temperature range of 293 K–793 K with inlet pre...

The air quality impact of the industrial emissions is one of the most important areas of research in the last years not only because of the progressive public interest on environmental issues but also from the industrial approach. The interest of knowing the exact and detailed portion of different air concentrations in the area where an industrial plant is located in realtime and in forecasting...

Bio fuel plays an important role in the energy production of the forest industry. The initial moisture of the fuel typically varies between 50 63 w-%. A multi stage drying concept has been developed for the drying of wet bio fuel. To adjust the temperature levels in the multi stage drying system there must be a simple and fast method to define the fuel initial moisture. A method to define the i...

When the cascade heat pump system is applied as a multi-functional that can be used not only for hot water supply but also air-conditioning of buildings, low-stage cycle responsible indoor heating and cooling thermal load, high-stage by raising refrigerant temperature. Unlike existing designed with one operation mode supply, should considered various parameters. This study was proposed design s...