Heat transfer through building opaque envelope is responsible for approximately half of the total heat loss and gain to from surroundings. Therefore, insulation materials are commonly used in reduce transfer. Recently, lightweight wall with lower thermal conductivity construction along such as heavy concrete earthen materials. In this perspective, there a need understand optimum thickness different types minimize unnecessary usage This study investigated following life-cycle approach, where...

An experimental investigation was conducted to study the flow characteristics and velocity fields of excited two parallel plane jets. The experiments were carried out at a jet Reynolds number 200. A loudspeaker system used create jets pulsation vary intensity pulsations constant excitation frequency 40 Hz. hot-wire anemometer measure velocities as they exited. patterns visualized using laser-light sheet technique combined with smoke visualization. spread widths determined from images taken...

The flow field of plane jets has been studied experimentally under both no-excitation and excitation conditions. jet pulsation intensity Reynolds number were fixed at 1.0 500, respectively, while the frequency increased gradually from 40, 60, 100 Hz. Acoustic characteristics determined using hotwire anemometry. Laser-assisted smoke visualization techniques used to render features, an edge detection technique was employed quantify spreading characteristics. velocity fields measured particle...

Thermoplastic fiber-reinforced composites are increasingly used in industrial applications due to their exceptional mechanical properties, recyclability, and thermal stability. However, manufacturing process poses significant challenges including high processing temperature pressures required for resin impregnation, which can lead void contents incomplete fiber wetting potential degradation. Existing models, such as Darcy law, inadequately describe the non-Newtonian behavior of thermoplastic...

The paper presents a detailed study based on the energy and exergy analysis of combined cycle power plant (CCPP) Guddu having triple pressure heat recovery steam generator (HRSG). loss efficiency each component with HRSG as whole is calculated. destruction these components sub-parts are also found out. All three stages turbine analysed individually. combustion chamber to have maximum share while condenser loss. total net output, calculated 737.8 MW, 59.12% 58.24%, respectively. error in...

Gas turbine blade cooling has major importance in improving the gas cycle performance by an increase inlet temperature (TIT). Among different techniques available, convection and film are most widely used techniques. Studies have shown that transpiration technique uses coolant more effectively than The present study deals with evaluation of blades. A comparison been made using air steam as mediums. Cycle evaluated terms overall efficiency specific power. Literature shows existing models...

The key to the successful and strong gas turbine technology bases significantly upon introduction of new materials and/or usage efficient means & methods blades cooling. Present paper deals with comparative evaluation cooling effectiveness for different blade Different techniques such as internal cooing, film transpiration have been considered study compressed air medium. performance results expressed in terms overall efficiency specific power cycle, which depend on type employed....

Successful gas turbine technology is based significantly upon the introduction of new blade materials with increased permissible temperature for blades and/or use efficient means and methods cooling in order to achieve highest possible inlet temperature. The models found literature indicate that effect radiation from elevated gases generally not considered. However, radiative heat transfer always occurs owing presence mainly carbon dioxide water vapour combustion products. present paper...

Fresh water is crucial for life, supporting human civilizations and ecosystems, its production one of the global issues. To cope with this issue, we evaluated performance cost a solar-powered direct contact membrane distillation (DCMD) unit fresh in Karachi, Pakistan. The solar heating system (SWHS) was help advisor model (SAM) tool. evaluation DCMD performed by solving mathematical through numerical iterative method MATLAB software®. For SWHS, simulation results showed that highest average...

ABSTRACT In recent years improved gas turbine performance through developments in high temperature materials and blade cooling methods has made a positive impact on the combined cycle performance. Transpiration technique emerged as most promising to improve by allowing higher inlet temperatures. This paper concentrates improving temperatures (TIT) using transpiration of blades. A four-stage advanced coupled with dual pressure steam bottoming is considered for cycle. Realistic input...

This paper provides assessment of the energy potential date palm residues, including leaflets, rachis, fruit prunings, and trunks, in Khairpur district, Sindh, Pakistan. The 'yield formula method' has been used to estimate residue generation potential. biomass residues generated district is estimated be 155,000 tonnes per annum, with 51% 44% share rachis respectively. total from trunks available for production found 87,000 which about 56% residues. experimentally measured heating values...

The model of converting a conventional energy dependent building to net zero reduce the carbon emissions through higher technology adoption in efficiency gains and renewable generation meet consumption. A country like India with abundant rich potential resources, NZEB is one step forward fight against climate change. proposed strategical shifting from traditional dependency overcomes serious effect power outages natural calamities, helps better improved security minimize foot print. It...