How to use Chiller:Electric:ReformulatedEIR in openstudio

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Does such a measure exist already?(I'm not a Ruby or E+ Guru) Any reason Chiller:Electric:ReformulatedEIR is not supported?

If you set up the chiller and curve objects in their own idf, you can use the inject idf objects measure to put those objects into your model. Then, if you don't want to figure out how to connect them via measure, you'd have to open up the out.idf and hook up the chiller manually.

I have an EnergyPlus Measure that does this for a Chiller:ConstantCOP that could be adapted. In addition to updating the Branch that the Chiller:Electric:EIR is on, the EP measure will also need to update the PlantEquipmentList.

Would it be possible to add the object chiller:electric:reformulatedEIR and the bicubic EIRfPLR curve into the osm file?

No, editing the OSM directly is a dangerous operation that can corrupt your model if you're not careful and in this case OpenStudio doesn't know how to translate it to EnergyPlus (not currently in the API). Andrew's or Eric's suggestions are the only ways to do this currently.