Design and Performance Evaluation of Supplemental Air Supplied Charcoal Stove

Improved charcoal stoves are known to generally develop high thermal efficiencies, but most generate appreciable level of gas emissions which has made them unsuitable for use within residential buildings. In order to eliminate this constraint, a supplemental air supply power pack was introduced to improve charcoal stove thermal and aesthetic performance. This paper described the experimental setup, test procedures and results showing optimized performance. Comparison between performance characteristics shows the air aspirated stove and other improved charcoal stove showed more than 20% increased efficiency, power input of 2.26 kW (0.691Kw/hr) and overall thermal efficiency of 36.74% for the improved stove, the stove is thermally efficient more than the traditional stove.

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Comparison of Performance-Assessment Methods for Residential PV Battery Systems

Energies ◽

10.3390/en13215529 ◽

2020 ◽

Vol 13 (21) ◽

pp. 5529

Author(s):

Fabian Niedermeyer ◽

Martin Braun

Keyword(s):

System Performance ◽

High Performance ◽

Residential Buildings ◽

Performance Comparison ◽

Test Procedures ◽

Self Sufficiency ◽

Battery Systems ◽

Efficiency And Effectiveness ◽

High System

Declining costs for high-performance batteries are leading to a global increased use of storage systems in residential buildings. Especially in conjunction with reduced photovoltaic (PV) feed-in tariffs, a large market has been developed for PV battery systems to increase self-sufficiency. They differ in the type of coupling between PV and battery, the nominal capacities of their components, and their degree of integration. High system performance is particularly important to achieve profitability for the operator. This paper presents and evaluates methods for a uniform determination of PV battery system performance. Already the requirement analysis reveals that a performance comparison of PV battery systems must cover the efficiency and effectiveness during system operation. A method based on a derivation of key performance indicators (KPIs) for these two criteria through an application test is proposed. It is evaluated by comparison to other methods, such as the System Performance Index (SPI) and aggregation of conversion and storage efficiency. These methods are applied with five systems in a laboratory test bench to identify their advantages and drawbacks. Here, a particular focus is on compliance with the initially formulated requirements in terms of both test procedures and KPI derivations. Analysis revealed that the proposed method addresses these requirements well, and is beneficial in terms of result comprehensibility and KPI validity.

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Development and Performance Evaluation of an Improved Thermal Performance Wood Stove using Skirt

Nigerian Journal of Basic and Applied Sciences ◽

10.4314/njbas.v28i1.12 ◽

2021 ◽

Vol 28 (1) ◽

pp. 93-102

Author(s):

I. Ajunwa ◽

C.O. Folayan ◽

G.Y. Pam ◽

S. Abubakar ◽

M.J. Iorpenda ◽

...

Keyword(s):

Energy Source ◽

Performance Evaluation ◽

Fuel Consumption ◽

Thermal Performance ◽

Thermal Efficiency ◽

Heat Energy ◽

Specific Fuel Consumption ◽

Wood Stove ◽

Water Boiling Test ◽

And Performance

The importance of heat energy source from wood to humanity cannot be over emphasised since many depend on it for their heating needs. In this work, a wood stove was designed, constructed and tested without a skirt and with a detachable skirt of height 120 mm (same height as the pot used for the experiment) to ascertain the influence of the skirt on the stove in terms of thermal performance in a water boiling test. Thermal efficiency and specific fuel consumption were evaluated. It was found that the stove tested without a skirt gave an average thermal efficiency of 31.33% and an average specific fuel consumption of 0.14 kg/l. When tested with a skirt, however, the stove gave an average thermal efficiency of 38.65% and an average specific fuel consumption of 0.09 kg/l. This signifies an improvement in thermal performance by the use of skirt on the stove designed. Keywords: Humanity, Globally, Detachable-skirt, Thermal performance, Wood stove.

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Performance Evaluation of Solar Tunnel Dryer for Drying of Garlic.

Current Agriculture Research Journal ◽

10.12944/carj.5.2.09 ◽

2017 ◽

Vol 5 (2) ◽

pp. 212-218 ◽

Cited By ~ 1

Author(s):

Arjoo Arjoo ◽

Yadvika Yadvika ◽

Y.K. Yadaadav

Keyword(s):

Performance Evaluation ◽

Moisture Content ◽

Thermal Efficiency ◽

Initial Moisture Content ◽

Drying Process ◽

Tunnel Drier ◽

Drying Time ◽

Tunnel Dryer ◽

Safe Level ◽

And Performance

This paper presents dying efficiency and performance of the solar tunnel dryer for drying of garlic. The dryer is a tunnel like semi-cylindrical in shape, poly house made up of UV-stabilized polyethylene sheet. The capacity is large enough that it can be used to dry 400 kg of garlic under controlled environmental conditions. The temperature inside the dryer was always higher than the ambient and the variation varied from 8-30 ºC. Initial moisture content of garlic was reduced from 66 % (w.b.) to about 9 % (w.b.) in 9 days which is considered to be a safe level. During the drying process the average thermal efficiency of the drier was estimated to be about 13.45 %. Drying time was considerably reduced with the use of a solar tunnel drier and pressing of the sample. Also, the final dried garlic was found to be good in terms of quality and sensory evaluation shows that it is highly acceptable.

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Acquisition and Tracking of Galileo IOV E5 Signals: Experimental Results and Performance Evaluation

Annual of Navigation ◽

10.2478/v10367-012-0009-5 ◽

2012 ◽

Vol 19 (1) ◽

pp. 105-120 ◽

Cited By ~ 4

Author(s):

Davide Margaria ◽

Maurizio Fantino ◽

Luciano Musumeci

Keyword(s):

Performance Evaluation ◽

Signal Strength ◽

Received Signal Strength ◽

Signal Acquisition ◽

Experimental Setup ◽

Modulation Format ◽

Navigation Data ◽

Interface Control ◽

Signal Features ◽

And Performance

Abstract An assessment of the Galileo In-Orbit Validation (IOV) signals on the E5 band is presented in this paper, investigating the signal features compared with the expected characteristics as described in the Galileo Interface Control Document (ICD) specifications. In detail, the results in terms of signal acquisition and tracking during multiple satellite passes are discussed, providing also a description of the experimental setup used in order to separately receive and process E5a and E5b signals. The analysis covers the received signal strength versus the satellite elevation, the modulation format, and the presence of navigation data and secondary code chips. Since at time of writing both the two Galileo IOV satellites (PFM and FM2) are broadcasting E5 signals, the results obtained processing their E5a and E5b signals are discussed. In addition, these signals are also compared with those currently transmitted by the two experimental Galileo satellites, GIOVE-A and GIOVE-B.

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Design and performance evaluation of a novel self-rotating fuel injector using computational fluid dynamics - a preliminary study

Thermal Science ◽

10.2298/tsci190812447c ◽

2020 ◽

Vol 24 (1 Part A) ◽

pp. 271-280

Author(s):

Pichandi Chandrasekar ◽

Neelakantan Prasad ◽

Varadarajan Balamurugan ◽

Natteri Sudharsan

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Performance Evaluation ◽

Thermal Efficiency ◽

Cfd Simulation ◽

Design Procedure ◽

Fuel Injector ◽

Preliminary Study ◽

And Performance ◽

Rotating Injector

Improving the performance and reducing emissions in a diesel engine is the single most objective in current research. Various methods of approach have been studied and presented in literature. A novel but not so pursued study is on the performance of a rotating diesel injector. To date, there has been very little study by implementing a rotating injector. Studies have shown an improvement on the performance of an engine, but with a complicated external rotating mechanism. In the present research, a novel self-rotating fuel injector is designed and developed that is expected to improve the performance without the need for a complicated rotating mechanism. The design procedure, CFD simulation along with 3-D printing of a prototype is presented. Numerical modelling and simulation are performed to study the combustion characteristics of the rotating injector viz-a-viz a standard static injector. Comparison based on heat release, efficiency, and emissions are presented. While the proposed 9-hole injector had slight loss in thermal efficiency, the modified 5-hole had a slight increase in thermal efficiency when compared to the static baseline readings. The NOx reduced by 13% and CO increased by 14% compared baseline emissions for the 5-hole version.

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