4.39 DHWSOLARSYS
Solar water heating system.
- DHWSOLARSYS
- DHWSOLARCOLLECTOR
- DHWSOLARTANK
May have any number of solar collectors, but only one tank.
May have no tank for direct system? What if system has multiple primary tanks?
swElecMtr=mtrName
Name of METER object, if any, to which DHWSOLARSYS electrical energy use is recorded (under end use ???).
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| oF | name of a METER | not recorded | No | constant |
swSCFluidSpHt=float
Specific heat for the collector fluid.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| Btu/lbm-oF | x \(>\) 0 | 0.9 | No | constant |
swSCFluidDens=float
Density for the collector fluid.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| lb/ft3 | x \(>\) 0 | 64.0 | No | constant |
swEndUse
End use of pump energy; defaults to “DHW”.
swParElec=float
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| x \(\ge\) 0 | 0 | No | hourly |
swTankHXEff=float
Tank heat exchanger effectiveness.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| 0 \(\le\) x \(\le\) 0.99 | 0 | No | hourly |
swTankTHxLimit=float
Temperature limit for the tank collector.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| oF | x \(\geq\) 0 | 180.0 | No | constant |
swTankUA=float
Heat transfer coefficient for the tank multiplied by area.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| Btuh/oF | No | constant |
swTankVol=float
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| gal | No | constant |
swTankInsulR=float
Total tank insulation resistance, built-in plus exterior wrap.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| ft2-oF/Btuh | No | constant |
swTankZone=znName
Pointer to tank zone location, use sw_tankTEx if NULL
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| Name of ZONE | No | constant |
swTankTEx=float
Surrounding temperature.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| oF | No | hourly |
endDHWSOLARSYS
Optionally indicates the end of the DHWSOLARSYS definition.
| Units | Legal Range | Default | Required | Variability |
|---|---|---|---|---|
| none | No |