Integrated energy systems modelling tools?

Does anybody have a strong experience of multi-vector energy systems modeling using existing tools? Suggestions on modeling tools that can do transport, power and heating system modeling in an...

04 May 2019 3,774 2 View

Is there any robust source that proposes specific carbon tax?

I am interested in the range of prices proposed for carbon tax in order to help national/global carbon reduction targets/ambitions. Does anybody know of any scientific literature or reputable...

10 November 2018 704 0 View

What is the best tool for data analytics?

I know a wide range of tools are available for data analytics, imputation and visualisation. I would love to hear the experience of others on the best tools for analysing large volumes of data and...

06 July 2018 6,815 4 View

Is global horizontal irradiance correction for PV tilt possible independent of solar elevation?

I have a very specific question, I have hourly total (i.e. global) solar irradiance on horizontal plane (measured by a building rooftop pyranometer) next to an array of PV modules mounted at a...

05 June 2018 6,093 6 View

How to break down global irradiation into direct and diffused elements?

Hello all There is a vast amount of literature, some very old indeed, that talk about solar irradiation component modelling. I want to break global measurements (in W/m2) to its direct and...

05 June 2018 3,195 11 View

Up-to-date total UK primary energy use?

Does anybody know of a respected source that outlines total primary energy use in the UK? BEIS has published a document (Energy consumption in the UK: 2017) but I am wondering if there is any...

03 April 2018 1,317 0 View

Published figures for decarbonisation of natural gas in the UK?

Can anybody suggest any source (or referenced figures) for plans to decarbonise natural gas in the UK? The Committee on Climate Change (CCC) suggests a target of 50 gCO2e/kWh of UK grid...

02 March 2018 8,197 3 View

Convective heat transfer coefficient (hc) for building simulation ?

08 September 2017 1,405 3 View

What is a reasonable iteration limit for CFD?

I am working on a CFD analysis of a 80m2 greenhouse used for drying seeds. The space has 8 shelves stacked at 4 different heights and openable windows for excess moisture and heat to be removed. I...

31 December 2016 7,946 8 View

Calculating temperature-dependant internal surface convective heat transfer coefficient (CHTC)?

Does anybody know the best validated method for dynamically calculating the CHTC for a concrete ceiling inside a building? I know that great variations are reported (below are two good sources),...

10 November 2016 6,058 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View