What is the equation to determine the solar flux on the parabolic solar collector. How to calculate the magnitude ?

for the parabolic silar collector how to calculate the magnitude of the total heat flux on the receiveR.

31 December 2017 7,315 2 View

The comparison between academic engineering teaching and technical engineering teaching?

31 December 2016 2,258 0 View

Does the Nu number increase or decrease for nanofluids?

The Nu number for a nanofluid increases based on the increase of the heat transfer coefficient. At the same time, the thermal conductivity of the nanofluids were highly increased.

02 March 2014 698 6 View

Is the heat transfer coefficient a thermophysical property for a fluid?

The heat transfer coefficient is a very important parameter during the thermal application, and depends on many parameter such as the materials of fluid temperature. But the other important group...

01 February 2014 5,401 18 View

Which statistical software is better to determine the correlation?

There are many statistical software can use to find the nonlinear correlation for any data. I was use the minitap and spss but the equation form still not wide as I want.

31 December 2013 8,578 14 View

What is the difference between the average Nu and the fully developed Nu?

In the laminar flow in the constant heat wall pipe the fully developed Nu magnitude is 4.36, then is the average Nu still same or different in magnitude?

11 December 2013 2,985 9 View

What is the factors that effected the performance of oil pan?

01 January 1970 5,684 2 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

What is Nano technology with coronavirus helpe the human..and is it nano mterals removal of covid19?

I anwar by adsorption or reaction ..but it is either more method...

02 March 2021 4,811 2 View

How to compare different concentrations of nanoparticles for characterization from ICP-MS?

I took measurements of different concentrations of 15 nm and 5 nm Au nano particle solutions. I'm trying to determine which concentration I measured gives the best reading overall. I also...

02 March 2021 7,626 1 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View

Zno nano particles colour changed from white to grey in process of calcination any suggestions?

In the formation of Zno nano particles process, after drying at 120 degree C, my zno nano particles are completely white but when i calcine it for 450 degree C it converts into grey colour. i...

26 February 2021 2,435 4 View

Do you kow of any database containing data on retention time, log P and polarizability for a large number of molecules?

Hi, I am a chemistry undergraduate doing my dissertation project on HPLC. In my project, I need to predict the HPLC retention time of 20 aromatic molecules, the calibration set. To do this I will...

24 February 2021 2,602 1 View

Any easy method of analyzing vitamin D in foods by HPLC?

Looking for method of extracting and analyzing vitamin D in foods by HPLC

24 February 2021 7,524 7 View

What HPLC Marker(s) should be used to detect anthocyanins in a sample?

What HPLC Marker(s) or standard is used to detect and quantify anthocyanins such as Delphinidin, Cyanidin in a given sample of plant extract?

23 February 2021 1,832 4 View

HPLC baseline failure (ACN/Water)?

My baseline increases without any explanation, it is only fixed by changing the solution B, will it be the column? Reagents? Bomb? Detector? Solution A: H3PO4 0.01% IN WATER Solution B: H3PO4...

21 February 2021 5,656 3 View