The LifeCycleCost:UsePriceEscalation object will commonly be part of a dataset on life cycle costs. The values for this object may be found in the annual supplement to NIST Handbook 135 in Tables Ca-1 to Ca-5. A dataset file comes with EnergyPlus in the DataSet directory and includes the LCCusePriceEscalationDataSetXXXX.idf file which includes the value for the supplement to NIST 135 from the year indicated. The object provides inputs for the escalations of energy and water costs assuming that they change differently than inflation. According to the NIST 135 supplement the values are “present projected fuel price indices for the four Census regions and for the United States. These indices, when multiplied by annual energy costs computed at base-date prices provide estimates of future-year costs in constant base-date dollars. Constant-dollar cost estimates are needed when discounting is performed with a real discount rate (i.e., a rate that does not include general price inflation).”
The identifier used for the object. The name usually identifies the location (such as the state, region, country or census area) that the escalations apply to. In addition the name should identify the building class such as residential, commercial, or industrial and the use type such as electricity, natural gas, or water.
Enter the resource such as:
Field: Escalation Start Year[LINK]
This field and the Escalation Start Month define the time that corresponds to “Year 1 Escalation” such as a year expressed in four digits like “2013”, when the escalation rates are applied. This field and the Escalation Start Month define the time that escalation begins.
Field: Escalation Start Month[LINK]
This field and the Escalation Start Year define the time that corresponds to “Year 1 Escalation” such as a year expressed in four digits such as “2013”, when the escalation rates are applied. This field and the Escalation Start Year define the time that escalation begins.
The choices are:
The default value is January. According to NIST Handbook 135:
Field: Year 1 Escalation[LINK]
The escalation in price of the energy or water use for the first year expressed as a decimal.
Field: Year n Escalation[LINK]
The escalation in price of the energy or water use for the n-th year expressed as a decimal. This object is extensible and often includes 25 to 50 years of projected values.
If the number of years in LifeCycleCost:UsePriceEscalation is less than the number of years in the analysis period, the remaining years will assume no escalation. Normal inflation will be the only affect for these years.
An example of this object in an IDF:
LifeCycleCost:UsePriceEscalation, NorthEast Residential-Electricity, !- Name Electricity, !- Resource 2010, !- Escalation Start Year January, !- Escalation Start Month 0.9374, !- Year 1 Escalation 0.9790, !- Year 2 Escalation 1.0138, !- Year 3 Escalation 1.0127, !- Year 4 Escalation 1.0096, !- Year 5 Escalation 1.0177, !- Year 6 Escalation 1.0279, !- Year 7 Escalation 1.0334, !- Year 8 Escalation 1.0327, !- Year 9 Escalation 1.0382, !- Year 10 Escalation 1.0454, !- Year 11 Escalation 1.0494, !- Year 12 Escalation 1.0564, !- Year 13 Escalation 1.0587, !- Year 14 Escalation 1.0549, !- Year 15 Escalation 1.0566, !- Year 16 Escalation 1.0630, !- Year 17 Escalation 1.0707, !- Year 18 Escalation 1.0857, !- Year 19 Escalation 1.0953, !- Year 20 Escalation 1.1063, !- Year 21 Escalation 1.1165, !- Year 22 Escalation 1.1227, !- Year 23 Escalation 1.1292, !- Year 24 Escalation 1.1349, !- Year 25 Escalation 1.1414, !- Year 26 Escalation 1.1480, !- Year 27 Escalation 1.1550, !- Year 28 Escalation 1.1617, !- Year 29 Escalation 1.1686; !- Year 30 Escalation