am trying to look at TOSSIM and ENERSIM  see if they can work well kindly suggest more tools i can use to simulate the energy consumption by computers

I recommend you consider using the Argonne GREET carbon use model. You should be able to access it by entering "Argonne" and "GREET".

GREET may be a good tool for you, but if you are doing your research related with isolated energy system, then HOMER is best.

you might find some tools in a review

Mirakyan A, De Guio R (2013) Integrated energy planning in cities and territories: A review of methods and tools. Renewable and Sustainable Energy Reviews 22 (0):289-297. doi:http://dx.doi.org/10.1016/j.rser.2013.01.033

I recommend you top use GREET mode. 

I have attached a link where you can watch tutorial videos:

https://www.youtube.com/channel/UCFv7X4oP_87LMDUgB35eg2Q

Dear Victor,

LEAP: http://www.energycommunity.org/default.asp?action=122

It could be a good option for you.

Regards