Sallerspark case study
Posted: 14 Feb 2016 00:35
Hi forum members and Moderator,
As being a novice to openLCA I’m reading the case study of Sallerspark in order to obtain more experience with creating flows and processes.
1. Reading the section 3.2.1 Create processes I notice that all processes have output product flows with unit “Item(s)” except the process named “Natural stone plate, transport” that has its output flow with unit in kg.
So my question is: Why is that exception?
2. My second question focuses the relation between “Unit” and “Resulting amount”. I see that for a flow, the resulting amount can be expressed by a formula (figure) or by parameters. I think that the resulting amount (nevertheless how it is expressed) for a flow should have its measurement in the units specified in column Unit. Am I right to think that? I’m asking this question because for the process "Remodelled park" (in section 3.2.1), the input flow "Deforestation" shows that I’m not.
If we replace the parameters in the expression under Resulting amount with their units, the result is:
([y]*[kg/m3]/[y] + [y]* [kg/m3]/[y])*59/[kg/m3] = [kg/m3]*59/[kg/m3] = 59 [m3] = [m3], i.e. (cubic meters), not item(s) as written in column Unit. (Where 59 is the number of cut trees as specified in parameters table).
I’ll be thankful if someone comments above.
Chris P.
As being a novice to openLCA I’m reading the case study of Sallerspark in order to obtain more experience with creating flows and processes.
1. Reading the section 3.2.1 Create processes I notice that all processes have output product flows with unit “Item(s)” except the process named “Natural stone plate, transport” that has its output flow with unit in kg.
So my question is: Why is that exception?
2. My second question focuses the relation between “Unit” and “Resulting amount”. I see that for a flow, the resulting amount can be expressed by a formula (figure) or by parameters. I think that the resulting amount (nevertheless how it is expressed) for a flow should have its measurement in the units specified in column Unit. Am I right to think that? I’m asking this question because for the process "Remodelled park" (in section 3.2.1), the input flow "Deforestation" shows that I’m not.
If we replace the parameters in the expression under Resulting amount with their units, the result is:
([y]*[kg/m3]/[y] + [y]* [kg/m3]/[y])*59/[kg/m3] = [kg/m3]*59/[kg/m3] = 59 [m3] = [m3], i.e. (cubic meters), not item(s) as written in column Unit. (Where 59 is the number of cut trees as specified in parameters table).
I’ll be thankful if someone comments above.
Chris P.