How can I model a Cooling Radiant Panel with a Desiccant Dehumidifier Component through Energy-Plus?

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I tried to simulate a small room containing a Ceiling low temperature radiant panel as a zone equipment and an air loop containing only a desiccant dehumidifier component without any cooling or heating coils. But, the unmet hours are many. If anyone has an experience with that, would like to tell me the best way to do that please.