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# Revision history [back]

### Furnace Efficiency DOE-2/EnergyPLus

In the EnergyPlus documentation, for the description of the part-load fraction performance curve for the furnaces, it says: "This [...] performance curve [...] parameterizes the variation of gas consumption rate by the heating coil as a function of the part load ratio [...]. For any simulation timestep, the nominal gas consumption rate (heating load/burner efficiency) is divided by the part-load fraction (PLF) if a part-load curve has been defined."

DOE-2 calculates the HIR-op as the product of the rated HIR and the HIR-FPLR(PLR).

I compared the default (when using a template) EnergyPlus performance curve for the PLF and the default curve for HIR-FPLR(PLR) in eQUEST. They are pretty pretty similar! Which makes me thinks that we can consider that PLF = HIR-FPLR(PLR).

The HIR for a particular time step is ratio the of fuel used to the heating energy produced.

According to the DOE-2 definition we have: Conso-op = f(Conso-rated * HIR-FPLR(PLR))

According to the EnergyPlus definition we have: Conso-op = f(Conso-rated / PLF)

Which is not the same thing and makes me think that PLF <> HIR-FPLR(PLR) ... Am I missing something?

 2 retagged __AmirRoth__ 4388 ●5 ●16 http://bleedinggreenna...

### Furnace Efficiency DOE-2/EnergyPLus

In the EnergyPlus documentation, for the description of the part-load fraction performance curve for the furnaces, it says: "This [...] performance curve [...] parameterizes the variation of gas consumption rate by the heating coil as a function of the part load ratio [...]. For any simulation timestep, the nominal gas consumption rate (heating load/burner efficiency) is divided by the part-load fraction (PLF) if a part-load curve has been defined."

DOE-2 calculates the HIR-op as the product of the rated HIR and the HIR-FPLR(PLR).

I compared the default (when using a template) EnergyPlus performance curve for the PLF and the default curve for HIR-FPLR(PLR) in eQUEST. They are pretty pretty similar! Which makes me thinks that we can consider that PLF = HIR-FPLR(PLR).

The HIR for a particular time step is ratio the of fuel used to the heating energy produced.

According to the DOE-2 definition we have: Conso-op = f(Conso-rated * HIR-FPLR(PLR))

According to the EnergyPlus definition we have: Conso-op = f(Conso-rated / PLF)

Which is not the same thing and makes me think that PLF <> HIR-FPLR(PLR) ... Am I missing something?

 3 retagged __AmirRoth__ 4388 ●5 ●16 http://bleedinggreenna...

### Furnace Efficiency DOE-2/EnergyPLus

In the EnergyPlus documentation, for the description of the part-load fraction performance curve for the furnaces, it says: "This [...] performance curve [...] parameterizes the variation of gas consumption rate by the heating coil as a function of the part load ratio [...]. For any simulation timestep, the nominal gas consumption rate (heating load/burner efficiency) is divided by the part-load fraction (PLF) if a part-load curve has been defined."

DOE-2 calculates the HIR-op as the product of the rated HIR and the HIR-FPLR(PLR).

I compared the default (when using a template) EnergyPlus performance curve for the PLF and the default curve for HIR-FPLR(PLR) in eQUEST. They are pretty pretty similar! Which makes me thinks that we can consider that PLF = HIR-FPLR(PLR).

The HIR for a particular time step is ratio the of fuel used to the heating energy produced.

According to the DOE-2 definition we have: Conso-op = f(Conso-rated * HIR-FPLR(PLR))

According to the EnergyPlus definition we have: Conso-op = f(Conso-rated / PLF)

Which is not the same thing and makes me think that PLF <> HIR-FPLR(PLR) ... Am I missing something?

 4 retagged __AmirRoth__ 4388 ●5 ●16 http://bleedinggreenna...

### Furnace Efficiency DOE-2/EnergyPLus

In the EnergyPlus documentation, for the description of the part-load fraction performance curve for the furnaces, it says: "This [...] performance curve [...] parameterizes the variation of gas consumption rate by the heating coil as a function of the part load ratio [...]. For any simulation timestep, the nominal gas consumption rate (heating load/burner efficiency) is divided by the part-load fraction (PLF) if a part-load curve has been defined."

DOE-2 calculates the HIR-op as the product of the rated HIR and the HIR-FPLR(PLR).

I compared the default (when using a template) EnergyPlus performance curve for the PLF and the default curve for HIR-FPLR(PLR) in eQUEST. They are pretty pretty similar! Which makes me thinks that we can consider that PLF = HIR-FPLR(PLR).

The HIR for a particular time step is ratio the of fuel used to the heating energy produced.

According to the DOE-2 definition we have: Conso-op = f(Conso-rated * HIR-FPLR(PLR))

According to the EnergyPlus definition we have: Conso-op = f(Conso-rated / PLF)

Which is not the same thing and makes me think that PLF <> HIR-FPLR(PLR) ... Am I missing something?