I have a project located at Dubai where a localized existing district cooling plant will be providing chilled water. However the DCP supplier is not willing to share any information about their information with us. In this case I guess I need to go with energy model for Option 1 ( Building stand-alone scenario). It is stated that the energy source of both baseline and proposed buildings will be purchased chilled water. And it is quite clear that baseline water-side setting will follow ASHRAE 90.1 Appendix G (in my case the baseline chiller COP will be 6.1 etc.).
My question is: shall I use the same water-side setting (proposed chiller COP of 6.1 etc.)for proposed building as well?
Or shall I use the default chiller plant efficiency of 4.4 for proposed building?