Forum for ecoinvent Version 3

control cabinet production, heat and power co-generation unit, 160kW electrical

Written on: 16.01.2019#1

Author:
Eco5492

Hello,

How can I find more details about the inputs of 'control cabinet' module?

The consumed energy seems huge just for manufacture: if its use is taken into account, how to know the proportion of energy consumed in each phase? 

Thanks!

Written on: 17.01.2019#2

Dear Eco5492,

 

You can have a look in the original documentation of the dataset (unfortunately it is in German only). You can find it by logging in ecoquery of version 2 and browsing in the "Reports" tab. There you should find report No: 06_XIV. From a quick check I did the value is accurate as reported in the report.

Please have a look there.

Best regards,

Avraam Symeonidis,

Data analyst, ecoinvent

Written on: 17.01.2019#3

Author:
Eco5492

Dear Avraam,

Thank you for your quick reply. The report seems very helpful, unfortunately, I don't manage german... 

From what I understand, the inventory only concerns the manufacturing step. In that case, the control cabinet manufacture would require 500 MJ/kg (excluding the 1690 kWh of electricity consumption), that is to say, 10 times more than copper production and roughly 40 times more than steel production (when steel is 95% of cabinet mass and copper 4%).

What did I miss to understand this inventory?

Best regards

 

Written on: 17.01.2019#4

Dear Eco5492,

On the first place we are talking about an electrical installation that has quite a large volume (1.8*2*0.6 m3). This contains many kg of metals and many kg of copper as well. In addition, the dataset describes many infrastructure components of a cogeneration plant. The dataset refers to a whole unit of equipment and not 1 kg. I am not sure where you found this value of 500 mJ/kg but in case you would like to expand this thread please do not post values like this as other forum users can be mislead. 

 

Best regards,

Avraam Symeonidis,

Data analyst, ecoinvent

Written on: 17.01.2019#5

Author:
Eco5492

Dear Avraam,

Indeed, is a shortcut: the cabinet weight around 290 kg, I just divided the energy consumed by this weight to have a rough idea on the order of magnitude... I'm sorry if it could induce misleading. 

I still don't understand this huge amount if it is not for operation. 

Best regards

 

Written on: 23.01.2019#6

Dear User,

According to the report mentioned by my colleague Avraam, the dataset models a control cabinet of a CHP with a capacity of 160 kWel and 360 kW th, installed in the late 1980ies, which was chosen as representative for this purpose.

The price and measurements (h*l*w) were known about the control cabinet. In addition, the following assumptions were made:

·         Cabinet: 12m3 wall surface of 2mm depth made from steel with a density of 7.9*103 kg/m3, which results in a weight of 190 kg.

·         Electronics: based on the given price it was derived that the cabinet contains about 187 kg of electronics. This was broken down into several material fractions as listed in table 4.18 of the mentioned report.

·         Assumptions on energy requirements for the assembly and installation of the control cabinet were based on the available data on prices and energy intensities. 1690 kWh electricit energy, 82700 MJ natural gas and light fuel oil each, as stated in table 4.19, p. 40 of the report.

Given the assumptions and uncertainties involved in the energy data, you may wish to replace it with the specifc data you have for the system you are modelling.

 

Kind regards,

Florentine Brunner,

Data Analyst, ecoinvent