Hybrid solar and geothermal utilisation is a promising option for effective exploitation of renewable energy sources. Concentrated power (CSP) systems with preheating are acknowledged as an attractive solution, supercritical CO2 (SCO2) cycle adopted generation thanks to the favourable properties offered by working fluid. In order further improve overall performance such systems, organic Rankine...

Energy storage plays a significant role in the rapid transition towards higher share of renewable energy sources electricity generation sector. A liquid air system (LAES) is one most promising large-scale technologies presenting several advantages: high volumetric density, low losses, and an absence geographical constraints. The disadvantages LAES systems lay on investment cost, requirements, r...

Abstract A new design paradigm for nuclear power plants is needed to complement the increasing adoption of low marginal cost variable renewable energy resources. The situation reflected in wholesale electricity price–duration curve with four distinct economic opportunities: (a) a hundred or so hours per year high-value peaking power; (b) about 4000–5000 h moderate electric prices; (c) 2000 when...

Combined heat and power (CHP) systems in both power stations and large plants are becoming one of the most important tools for reducing energy requirements and consequently the overall carbon footprint of fundamental industrial activities. While power stations employ topping cycles where the heat rejected from the cycle is supplied to domestic and industrial consumers, the plants that produce s...

The purpose of this paper is multi-objective optimization of refrigeration cycle by optimization of all components of the cycle contains heat exchangers, air condenser, evaporator and super-heater. Studied refrigeration cycle is compression refrigeration cycle of unit 132 Third refineries in south pars that provide chilled water for cooling refinery equipment's. Cycle will be performed by t...

The aims of this study were to determine in-vehicle carbon monoxide (CO) levels in major commuting modes in the Metropolitan Area of Mexico City (MAMC) and to identify the main factors affecting the variation in these CO concentrations. CO concentrations were measured inside public and private transport vehicles during the winter of 1991 in Mexico City. Measurements were taken along several com...

Two-phase ejectors are devices capable of improving the performance of refrigeration and air conditioning cycles by means of expansion work recovery. Ejector studies often focus on the design and performance of the two-phase ejector and the effect it can have on the performance of the ejector cycle. However, the ejector is not the only component of the system that can have a significant influen...