ABSTRACT Heat sinks dissipate heat from electronic components, and the increase in generation owing to technological advancements has prompted researchers improve sink efficiency. The present study aims by high‐emissivity nanocoating where coating is prepared using nanoparticles CuO MWCNT at a rate of 6% half liter Acrylic resin solvents Xylene Butyl acetate 30%. After sink, emissivity was examined it (0.963) while before (0.202). inside cubic cavity with right surface containing heaters...

The power to weight ratio of plants is an important consideration, especially in the design Unmanned Aircraft System (UAS). In this paper, a UAS with MTOW 35.3 kg, equipped fuel cell as prime supply provide electrical propulsion system, considered. A pressure vessel that can estimate and determine total size combined plant stack hydrogen air/oxygen vessels system for high-altitude operation proposed. Two scenarios are adopted required oxygen stack. Different types stainless-steel materials...

A pragmatic approach for Local Area Energy Planning to capture Whole System interactions and meet the dual goals of informing regulated infrastructure requirements while businesses local authorities on building their business plans, is presented. Unlike existing approaches, method presented in this paper aids market change by considering policy prioritisation, commercial relationships, place-based resources, processes interfaces, people (skills vulnerabilities), energy vector...

Aggregated electrical loads from massive numbers of distributed retail refrigeration systems could have a significant role in frequency balancing services. To date, no study has realised effective engineering applications static firm response to these aggregated networks. Here, the authors present novel and validated approach that enables large scale control assets. The show model simulates operation refrigerators comprising centralised compressor packs feeding multiple in-store display...

One of the major problems using nanofluids in heat exchange applications is forming and deposition nanoparticles on inner surface exchanger. In this paper, Water-Cmc fluid used as a surfactant for to prevent congregation. The pressure drops transfer U-bend double pipe exchanger based water-MgO-Cmc fluid, are examined. Nanoparticles Magnesium Oxide (MgO) Carboxymethyl Cellulose (Cmc) with pure water base fluid. experimental rig procedures designed facilitate various operational conditions...

The operation and the development of power system networks introduce new types stability problems. effect generation consumption on frequency can be described as a demand/generation imbalance resulting from sudden increase/decrease in demand and/or generation. This paper investigates impact loss transient behaviour grid frequency. A simplified model is proposed to examine change main parameters (system inertia, governor droop setting, load damping constant, high-pressure steam turbine...

Abstract The present study aims to enhance the natural convection in heat sink inside an enclosure by perforating fins for power electronic applications. is a cube that manufactured such way upper and lower surfaces, as well front back are thermally insulated. right surface hot, while left cold at temperature difference ∆ T of (4°C, 8°C, 10°C). used consists five attached heated surface. perforated with perforation number NP (4, 8, 12, 16) diameter DP (0.5 1 cm). Temperatures measured using...

Abstract Commercial food outlets in the UK are responsible for 3% of total energy consumption, with refrigeration systems account 29% this total. This highlights potential and importance huge saving within commercial systems. In paper, a validated model that simulates system installed over 2000 sq. ft to mimic real express store at Riseholme Refrigeration Research Centre University Lincoln, UK, is developed presented. The detailed modeling display case using temperature comprising three...

Abstract A proton exchange membrane (PEM) fuel cell is particularly considered as a prime power supply for cell-powered unmanned aircraft system (UAS) it possesses very high-power density in comparison with other types, hence high potential to be used altitude long endurance (HALE) UAS flights. This paper will focus on examining the design requirements UAS-based 1 kW PEM operation (10–11 km), which can correlated into quantitative data produce constraints diagram. The maximum take-off mass,...

<title>Abstract</title> The power to weight ratio of the plant is an important consideration, especially in design Unmanned Aircraft System (UAS). In this paper, a UAS with MTOW 35.3 kg, equipped fuel cell as prime supply provide electrical propulsion system being considered. A pressure vessel proposed that can estimate and determine total size combined power-plant stack hydrogen air/oxygen vessels for high altitude operation. Two scenarios are adopted determining required oxygen stack....

Abstract Over the last decade, there has been a re-emergence of hydrogen as clean fuel for energy transition towards net-zero carbon emissions. Hence, significant interest shown in low-carbon and green to power this transition. Water electrolysis identified most common method production. However, increasing cell faradaic efficiencies deployment at scale involves improving every part system, e.g., electrodes. Recent investigations have suggested that surface structure electrodes can affect...

Abstract Commercial food outlets in the UK are responsible for 3% of total energy consumption, with refrigeration systems account 29% this total. In paper, a validated model that simulates commercial system installed over 2000 sq. ft to mimic real express store at Riseholme Refrigeration Research Centre University Lincoln, UK, is presented. Investigations conducted examine different failures air conditioning (AC) and their impacts on indoor temperature, hence performance consumption. Three...

Growing penetration of renewable sources power generation around the world causes a decline in inertia grids. This poses direct risk to safe operation systems, as frequency stability becomes difficult be maintained and managed. Being able predict react grid variations is crucial ensure reliable supply electricity. paper developed an integrated model wind turbine system with for investigation objective evaluate how impacts stability. A conventional 10 GW based on load control automatic...