District Energy Systems: pipe_insulation_moisture
District energy systems design reference data — chiller technology COP ranges, pipe insulation thermal properties and moisture performance, soil thermal conductivity, buried pre-insulated pipe heat loss, piping material comparisons, direct vs. indirect interconnection trade-offs, heating system conversion suitability, and district energy flow meter types per ASHRAE Handbook HVAC Systems and Equipment 2020 Chapter 12
| category | item key | description | value text |
|---|---|---|---|
| pipe_insulation_moisture | Cellular_Glass_Cooling | Moisture effect on cellular glass insulation — cooling conditions | Time to steady-state: data recorded at 4 days constant at 12 days; k-value increase from dry: none — no water penetration; primary heat transfer: conduction; time to return to dry k at 33 degF: no change |
| pipe_insulation_moisture | Cellular_Glass_Heating | Moisture effect on cellular glass insulation — heating conditions | Time to steady-state k: data recorded at 4 days constant at 12 days; k-value increase from dry: avg 10 times process unsteady; cracks form; moisture zone on inner diameter; time to return to dry k at 420 degF: 8 h |
| pipe_insulation_moisture | Fibrous_Glass_Cooling | Moisture effect on fibrous glass insulation — cooling conditions | Time to steady-state: 0.5 h; k-value increase from dry: 20 times completely saturated; primary heat transfer: conduction and convection; time to return to dry k at 35 degF: 15 days |
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