Abstract: Electric vehicle heat pumps are drawing more and more attention due to their energy-saving and high efficiency designs. Some problems remain, however, in the usage of the heat pumps in electric vehicles, such as a drainage problem regarding the external heat exchangers while in heat pump mode, and the decrease in heating performance when operated in a cold climate. In this article, an...

The aim of this study is to perform a dynamic modelling and simulation of a Portuguese industrial integrated system in order to analyse the integration and feasibility of the different units, maximizing its efficiency and minimizing its environmental damage, and to study the effect of some operational and atmospheric conditions on the system. For this purpose it was built a dynamic model of the...

The variations in the boiler operation conditions have a great effect on combustion characteristics and pollutant formation furnaces. This work aims to investigate effects of operational parameters NOx its distribution furnaces using numerical simulation method obtain optimum control strategy for reducing emissions. models pulverized coal involving flow, heat transfer, are established. Taking 6...

Heating, ventilation, and air-conditioning (HVAC) systems play a significant role in building energy consumption, accounting for around 50% of total usage. As result, it is essential to explore ways conserve improve HVAC system efficiency. One such solution the use economizer controls, which can reduce cooling consumption by using free-cooling effect. However, there are various types controls a...

Conceptual design of a waste heat recovery cycle is carried out in attempt to enhance the thermal efficiency of a steam power plant. In the recovery system, super-critical an CO2 is employed as the working fluid operating in a Brayton cycle. Low grade heat rejected by the flue gases through the stack is used as the primary heat source, while a secondary heat exchanger utilizes th...

The aim of this study is to obtain a dynamic modelling and simulation of a Portuguese industrial integrated system composed of three different processes. This work includes the analysis of the optimal integration of the different units, and the study of the effect of some operational and atmospheric conditions on the system to maximize its global thermal efficiency. The cogeneration system was ...

The purpose of this study was to provide a guideline for the selection technologies suitable ASHRAE international climate zones when designing high-performance buildings. In study, were grouped as passive, active, and renewable energy systems. Energy saving comprising 15 cases categorized into EnergyPlus v9.5.0 used analyze contribution each technology in reducing primary consumption. consumpti...

Premature infants in neonatal intensive care units (NICUs) have underdeveloped immune systems, making them susceptible to adverse health consequences from air pollutant exposure. Little is known about the sources of indoor airborne particles that contribute to the exposure of premature infants in the NICU environment. In this study, we monitored the spatial and temporal variations of airborne p...

Any building’s design should sustain thermal comfort for occupants and promote less energy usage during its lifetime using accurate building retrofits to convert existing buildings into low-energy so that the heating cooling loads can be minimized. Regarding methodology adopted in this research, an model of educational located at German Jordanian University Jordan was constructed utilizing Desi...

conceptual design of a waste heat recovery cycle is carried out in attempt to enhance the thermal efficiency of a steam power plant. in the recovery system, super-critical an co2 is employed as the working fluid operating in a brayton cycle. low grade heat rejected by the flue gases through the stack is used as the primary heat source, while a secondary heat exchanger utilizes the hot gases lea...