ASME PTC 53 pdf free download

ASME PTC 53 pdf free download Mechanical and Thermal Energy Storage Systems Performance Test Codes
2-1 DEFINITIONS
charge energy: the amount of primary energy crossing the test boundary during the charge interval.charge interval: the time duration during which the charging process operates.
charge loss rate: the change of the state of charge during a standby interval, expressed as kilowatt-hours per hour.charge power:the rate at which chargeenergy crosses the test boundary, the charge energy divided bythe charge interval.charge power rating: a charge power designated in a test plan (such as maximum, minimum,nominal or guaranteed)thatmay be derived from contracts, specifications, nameplates, guarantees, or other sources.
charge process: the means by which primary energy is transformed into increased internal energy of the storage medium.charge start-up interval: the time duration of transition from the standby state to the charge power rating.
discharge depth: a fraction or percentage equal to 1 minus the minimum state of charge at which the ESS can operate,which may be qualified as maximum, rated, normal, or guaranteed, and/or be referenced to the discharge power rating.discharge energy: the amount of primary energy crossing the test boundary during a discharge interval.
discharge interval: the time duration during which the discharge process operates.
discharge power: the rate at which discharge energy crosses the test boundary; the discharge energy divided by thedischarge interval.
discharge power rating:a discharge power indicated in a testplan (maximum,minimum,nominal,guaranteed,etc.),whichmay be derived from contracts, specifications, nameplates,guarantees,or other sources.
discharge process: the means by which internal energy of the storage medium is decreased and transformed into primaryenergy.
discharge start-up interval: the time duration of the transition from the standby state to the discharge power rating.energy loss: the amount of energy leaving the test boundary from the storage container, which decreases the internalenergy of the storage medium.
energy storage system (ESS): a system that consumes primary energy to increase the internal energy of a storage mediumand releases the stored energy at a later time as primary energy.
exhaust energy: the amount of nonprimary energy leaving the test boundary of the ESs during the charge interval ordischarge interval.
fuel energy: the amount of energy crossing the test boundary during a storage cycle in the form of combustible mass,i.e.,the fuel rate multiplied by the higher heating value.
fuel heat rate: the fuel energy divided by the discharge energy during a storage cycle, expressed as British thermal unitsper kilowatt-hour (kilojoules per kilowatt-hour).
fuelrate:forsolid and liquid fuels,the mass offuelfiredper unit ofoutput.For gaseous fuels, it is definedas cubicfeet ofgasat 59F and 14.696 psia (cubic meters at 15°C and 101.325 kPa) per unit of output. Fuel rates should be qualified byreference to the unit of output.1
higher heating value: heat released from the rapid oxidation of fuel.Heating value of fuels is determined in accordancewith the following Codes:
ASME PTC 3.1,Diesel and Burner FuelsASME PTC 3.2,Solid Fuels
ASME PTC 3.3,Gaseous Fuels
Each Code will specify using either the higher or lower heating value, typically expressed as British thermal units per pound mass (kilojoules per kilogram). Water vapor is one ofthe products ofcombustion for all fuels thatcontain hydrogen. The higher heatingvalue ofa fuel depends on whether this water vapor is allowed to remain in the vapor state or is condensed to liquid.
In a bomb calorimeter, the products of combustion are cooled to the initial temperature and all of the water vapor formed during combustion is condensed to liquid. This gives the higher, or gross, heating value of the fuel with the heat of vaporization included in the reported value. 1 incidental material: the amount ofmass crossing the test boundary into the storage container during the standby state, which may increase the internal energy of the storage medium.