China
Africa
Explore chapters and articles related to this topic
The circle and its properties
Published in John Bird, Bird's Basic Engineering Mathematics, 2021
A rectangular park measures 150 m by 70 m. A 2 m flower border is constructed round the twolonger sides and one short side. A circular fish pond of diameter 15 m is in the centre of the park and the remainder of the park is grass. Calculate, correct to the nearest square metre, the area of (a) the fish pond, (b) the flower borders and (c) the grass. (6)
Apparel costing for merchandiser
Published in R. Rathinamoorthy, R. Surjit, Apparel Merchandising, 2017
Scouring cost = Rs.80/kg $ {\text{ = Rs}} . 8 0 / {\text{kg}} $ ; cost per square metre =80×64.381000= Rs.5.15 $ {{ = 80 \times }}\frac{ 6 4. 3 8}{ 1 0 0 0}{\text{ = Rs}} . 5. 1 5 $
Revision Test 10: Areas of common shapes and the circle
Published in John Bird, Basic Engineering Mathematics, 2017
A rectangular park measures 150m $ 150\,\mathrm m $ by 70m $ 70\,\mathrm m $ . A 2m $ 2\,\mathrm m $ flower border is constructed round the two longer sides and one short side. A circular fish pond of diameter 15m $ 15\,\mathrm m $ is in the centre of the park and the remainder of the park is grass. Calculate, correct to the nearest square metre, the area of (a) the fish pond, (b) the flower borders and (c) the grass. (6)
Applications of a flat plate collector in dairy industries: a review
Published in International Journal of Ambient Energy, 2022
Ramachandra and Lalitha Narayana (2018) used three same-sized flat collectors in series and attached with the single basin solar still. They used 2 square metre cross-sectional area of the flat plate collector and 1 square metre area of solar still for their experimental work. Experimental set-up of solar still with series connections of flat plate collectors is shown in Figure 4. They carried out experiments in outdoor climate conditions of Andhra Pradhesh, India for 24 h. Their experimental work has concluded that the distillate output of the solar still remains lower when connecting with a single collector rather than three collectors in series, as shown in Figure 5. It has been also found that the thermal efficiency of the solar still reduces when two flat plate collectors in series connection with solar still due to the increase of solar radiation area.
A novel intelligent hybrid algorithm for maximum power point tracking in PV system
Published in International Journal of Electronics, 2023
Parisa Mohebbi, Rahmat Aazami, Amin Moradkhani, Saeed Danyali
In the next case, we first apply radiation of 400 watts per square metre, then 600 watts per square metre, and finally radiation of 1000 watts per square metre. That is, GP is the last peak. According to the Figure 21, and Figure 22. it can be seen that in this case, the system tracks the GP in the fastest time with the least loss of power.
Data granularity for life cycle modelling at an urban scale
Published in Architectural Science Review, 2020
In terms of methodological workflow, this study follows a sequence of five major steps (see Figure 1): (1) Data acquisition and characterization – this step features five sources of publically available data regarding the dimensions, geometry and materiality of the studied case. The sources can be mined or scraped in an automated manner with the exception of the base case data source. The base case is the most complete data source in the study – the results of the other sources are measured against it in a comparative manner. (2) Modelling – a building information model is constructed based on the input data obtained from each data source. The software used for this purpose in the study is Autodesk Revit (Khemlani 2004). (3) Analysis – each of the 3D models is broken down into individual components that are then analysed for LCA results using the Thinkstep (formerly GaBi) database (Thinkstep 2016) and the Tally plug-in (KT Innovations 2014). Extracting a comprehensive bill of material quantities from the Revit model, Tally pairs Revit’s material definitions with material entries in the Thinkstep database and returns LCI and LCIA results for the entire model (see Figure 3). (4) Results – Life cycle inventory (LCI) and life cycle impact assessment (LCIA) results are retrieved for each of the models. The evaluated LCI output in this study is embodied energy (EE). The LCIA outputs are global warming potential (GWP), ozone depletion potential (ODP), acidification, eutrophication and smog formation. In an effort to focus on material use, the study considers embodied impacts only. The analysed service lifespan is 60 years as is common in published built environment studies (Bribián, Capilla, and Usón 2011; Azari 2014). The scope of all studies in this paper is cradle-to-grave, accounting for all material manufacturing, maintenance and replacement, and eventual end-of-life (disposal, incineration and/or recycling), including the materials and energy used across all life cycle stages. System boundaries include primary materials and all additional materials required for the product’s manufacturing and use including hardware, sealants, adhesives, coatings and finishing. The functional unit is 1 square metre of building floor area. (5) Comparative assessment – the last step in this sequence includes a comparative evaluation of the five data cases where the result sets of the first four sources are measured in terms of deviation from the result set of the fifth – the base case.