Ergin Bayrak

11 Questions 12 Answers 0 Followers

Questions related from Ergin Bayrak

Is it suitable to use a density-based solver to solve supercritical CO2 laminar flow?

We have been numerically investigating the thermal-fluid characteristic of sCO2 laminar flowing in a 0.5 mm diameter circular microtube in upward direction. Depending on sharp density change along...

30 June 2020 5,296 2 View

What is your pump manufacturer recommendations, ensuring low flow rate and high operating pressure?

We have recently designed an experimental setup to investigate the detailed thermofluidic mechanism of near-critical CO2. We need to pump, ensuring low flow rate, high operating pressure and also...

23 July 2018 3,432 3 View

Do you know a sensetive platform scale you suggest to me?

Nowadays, I have been working on frosting, defrosting and refrosting occuring at unit coolers. I need a sensetive scale to put under to test unit, so it must be like a rectangular platform. As my...

28 April 2016 4,581 2 View

What is the best reference so as to design the contraction section of air tunnel?

I have been researching the air flow effects on frost formation at fin and tube heat exchanger and I need uniform flow media in front of heat exchanger. However, I haven't ensured at my tunnel...

20 December 2015 4,508 8 View

Is it possible to identify optimum refrigerant distributor geometry by building a water-vapor mixture test set-up?

Hi Dear Colleagues, As you know, refrigerant two phase distribution at evaporator is big problem because of the fact that it can cause significant capacity reduction unless used optimum...

24 November 2015 6,765 1 View

Is it any problem to be measured from outlet of fan?

Nowadays, I carry out frosting investigation on fin and tube evaporator. I want to learn my evaporator outlet relative humidity and temperature at outlet of fan. Normally, air side thermal...

28 October 2015 4,188 1 View

What is the precautions to avoid the negative effects of hydrogen sulphide on heat exchanger copper fin?

Dear collegues, I have been researching the damage of H2S on copper fins and precautions that have to be taken. What is the max. recommended H2S ppm in the air inlet of heat exchanger to not occur...

24 August 2015 2,518 3 View

How can I calculate enthalpy uncertainty value which is necessary for laboratory refrigerant side capacity?

I have completed uncertainty analysis for my heat exchanger calorimetric lab.but I am not sure the calculation of enthalpy ( it is required for Q=mr*deltaH) due to ref.prop program. Normally my...

28 April 2015 8,243 8 View

How to do optimum refrigerant distributor design?

I have some problem at evaporator such as flow side non-uniform distribution. I want to design a new distributor in detail. Normally I have been using nozzle type distributor but I don't ensure...

15 April 2015 9,602 5 View

What is the marangoni flow and its effects on condensation, where liquid and gas meet?

I learned that this phenomenon is related to surface tension. I don't know if this flow characteristic contributes to the overall improvement of the heat transfer rate at an evaporator. Thank you!

19 March 2015 3,222 4 View

Does anyone know NIST Evap-Cond V.3.0 circuity design program?

I would be grateful if you could share any experiences and knowledge about using NIST Evap-Cond V.3.0 circuity design program. I didn't create non uniform airflow profile in program. Thank you in...

14 November 2014 5,078 0 View