lower heating value


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lower heating value

[′lō·ər ′hēd·iŋ ‚val·yü]
(thermodynamics)
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The density at 20[degrees]C and the lower heating value were collected in triplicate, the results were submitted to analysis of variance (ANOVA) and the means were compared by Tukey test, adopting the significance level of 1-5% using the statistical package version Assistat[R] 7.7 beta (Silva, 2014).
The numbers may be higher when compared to the stock engine with ULSD because naphtha's lower heating value is higher than ULSD.
Caption: FIGURE 1 Conceptual schematic diagram that shows how the definition of lower heating value can be enhanced by the processes within the dashed lines to form a 100% outdoor air direct-fired heating system.
Then the lower heating value (LHV) of producer gas from OPF gasification was estimated by using the predicted fractions of gases, [X.sub.i], and heating value of the major fuel components CO, [H.sub.2], and C[H.sub.4] making use of the relation:
The density, viscosity, CN and lower heating value are important properties of biodiesel evaluation for its use as a diesel fuel substitute.
Higher and lower heating values obtained through the US Forest Services' Forest Products Laboratory fuel value calculator were used to determine the energy content and heating efficiency of each fuel, and comparisons were made on a per megajoule basis.
Considering that the lower heating value (LHV) of propane and butane are 2044.0 kJ [mol.sup.-1] (1937.3 BTU mol ) and 2658.5 kJ [mol.sup.-1] (2519.73 BTU [mol.sup.-1]), at 25 [degrees]C (77 [degrees]F), 1 atm (14.7 psi), respectively, and that their chemical exergy are 2149.0 kJ [mol.sup.-1] (2036.82 BTU [mol.sup.-1] ) and 2802.5 kJ [mol.sup.-1] (2656.2 BTU [mol.sup.-1]), respectively, the calculated lower heating value of LPG ([LHV.sub.LPG]) is 46008.2 kJ [kg.sup.-1] (19783.53 BTU [lb.sup.-1]) and its chemical exergy ([[xi].sub.[ch,LPG]]) is 48444.4 kJ [kg.sup.-1] (20830.92 BTU [lb.sup.-1]).
As a result of the foregoing developments, GTCCs featuring the J-series gas turbine are expected to achieve well above 60% power generation thermal efficiency (lower heating value).
COMBUSTION HEAT AND LOWER HEATING VALUE OF GASEOUS FUELS
Similarly, lower heating value was considered but rejected because of the success of ethanol, with a much lower energy density than gasoline, in the market.
But at high load the brake thermal efficiency of blend decreased this is mainly due to the lower heating value of blend of diesel and ethanol whereas B10 and B12.5 shows lower value than diesel.

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