We are dealing with the project served by DES. As client’s goal is to achieve Platinum we are proceeding with option 2 of modelling DES.

Our DES is served with mix fuel ( coal, biomass and oil) for which we calculated fuel mix price as 26,47 $/MWh. Our baseline system is on-site gas boiler for which fuel utility rate is 50,8$/MWh .

As DES guidance is super unclear we have a question in regard to the rates used for calculations:

should we use the same rates for baseline and proposed building equal to = 26,47 $/MWh (as calculated for the fuel mix)? Or maybe ,the same utility rates for base and proposed which are required in DES guide means that they must be consistent in both base and proposed building i.e. if DES will use gas it will be priced at rate of 50,8$/MWh - the same as baseline?

Any comments will be appreciated