Is it useful to run screw EXPANDERS at quality x <1?

06 July 2017 3,441 3 View

Can I neglect the friction forces after passage of the critical throat at supersonic 2-phase flow in a Laval nozzle?

For example a mixture of oil/air at Pin=10 bar Pout =1 bar.

03 April 2016 2,227 4 View

By-pass of fluid without contribution to work?

If you run a screw expander with steam quality x

01 January 1970 8,360 5 View

Maybe of interest for your project?

Dear Project workers, I think the article "Performance characteristics of a 200-kW organic Rankine cycle systemin a steel processing plant" by Taehong Sung a, Eunkoo Yun a,b, Hyun Dong Kim a, Sang...

01 January 1970 2,157 1 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

How to build fouling and erosion simulation model for Aero Engine compressor and turbine rotor in Simulink / Matlab?

How to build fouling and erosion simulation model for Aero Engine compressor and turbine rotor in Simulink / Matlab?

22 February 2021 3,697 1 View

Online surveys for social sciences researchs: what are your opinions about this tool and how can we improve the research design to incorporate online?

Good morning everyone, Due to the pandemic, I conducted several online surveys. It is quite agile, not at all expensive, but there are several problems: the sample's representativeness and its...

21 February 2021 7,457 3 View

Anyone know how to contact Raymond Streater?

He is emeritus in the mathematics department of King's College London. The email address listed on their web site is not functional. The department has no way of physically contacting him due to...

15 February 2021 5,529 1 View

ZnS oxidizes to ZnO!!why??

when I put my ZnS solution in the chemical bath, the ZnS oxidizes so there are ZnO peaks appearing because of the reaction with the oxygen in the air, despite the fact that I close the beaker...

14 February 2021 5,778 9 View

Nuances in the digital twin concept. Opinions?

Hello everyone, I am currently working on the state of the art of the digital twin concept, and after seeing the categorization made by Kritzinger, W. et al. (2018) [Digital Twin in...

14 February 2021 2,107 3 View

Hi, can a variable in a questionnaire be measured with a series of questions or it has to one question for one variable?

I am doing research on the impact of competitive bidding on project success and would like to use SEM. Project success shall be: cost overage, completion time, quality of works and variation...

13 February 2021 4,413 6 View

Why non-specific band appear on T-ARMS PCR?

Hi everyone. We want to know how can I remove the non-specific band amplification on this variant. Although the amplification of non-specific band is not as intense as the band that we want, but...

09 February 2021 588 2 View

What is your opinion regarding opening of school? Now students are supposed to join school. Do you think that decision is in the interest of society ?

From long Pendamic now government is opening school and colleges on for off line classes. What do you think that this decision is fruitful to the students and society too?

08 February 2021 3,068 6 View

Fractional derivative users, are you on the same page with me on the validity of the fractional order parameter, say alpha?

Taking a fractional ODE problem as an example. It has come to my attention that if the fractional order parameter is in the interval (0,1], many only presents results for alpha=0.9, 0.99. I saw...

08 February 2021 9,671 3 View