Difference Between HHV and LHV
Table of Contents
1. The numerical difference between the LHV and HHV of a fuel is roughly equivalent to the amount of latent heat of vaporization that can be practically recovered in a secondary condenser per unit of fuel burned. 2. ... The numerical value of HHV is always greater than or equal to the LHV.
How do you calculate LHV and HHV?
Under this formula, the relationship between the lower heating value of a fuel and the higher heating value of that fuel is: LHV = HHV – 10.55(W + 9H) Where: LHV = lower heating value of fuel in Btu/lb, HHV = higher heating value of fuel in Btu/lb, W = Weight % of moisture in fuel, and H = Weight % of hydrogen in fuel.
What is the LHV?
LHV (Lower heating value) is determined by subtracting the heat of vaporization of the water vapor from the higher heating value. LHV assumes that the latent heat of vaporization of water in the fuel and the reaction products is not recovered.
What does HHV mean?
HHV
| Acronym | Definition |
|---|---|
| HHV | Human Herpes Virus |
| HHV | Higher Heating Value |
| HHV | Hydraulic Hybrid Vehicle |
| HHV | Hilton Hawaiian Village |
What is the HHV of natural gas?
| Fuel | Density | Higher Heating Value (HHV) (Gross Calorific Value - GCV) |
|---|---|---|
| @0°C/32°F, 1 bar | ||
| Hydrogen | 0.090 | 39.4 |
| Methane | 0.716 | 15.4 |
| Natural gas (US market)* | 0.777 | 14.5 |
What is LHV efficiency?
This is a withdrawn hot water stream to remove dissolved solids and other impurities that would otherwise build up and damage the equipment. Thus, a good boiler efficiency would be around 100-6-1-1 = 92% (LHV).
Which has lowest calorific value?
Biogas has the lowest calorific value among the given fuels.
Which gas has highest calorific value?
Calorific value is nothing but the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram. Hence, hydrogen has the highest calorific value.
Which fuel causes least pollution?
Answer. Natural gas is the cleanest fuel and causes the least pollution when burnt compared to petrol, diesel and coal.
Why hydrogen is not used as a fuel?
Hydrogen has the highest calorific value so it can be considered as the best fuel but it is highly inflammable so it is diificult to store, transport and handle so it is used as a fuel only where it is absolutely necessary.
What disease does the human herpesvirus 1 cause?
Human herpesvirus 1 (HHV-1): A herpes virus that causes cold sores and fever blisters in and around the mouth. Here is a depiction of a typical fever blister caused by HHV-1: In rare cases, as when the immune system is severely compromised, this virus can cause infection of the brain (encephalitis).
What is calorific value and its types?
Calorific value is defined as amount of energy generated by combustion of specific amount of food or fuel. Calorific value unit is joule per kilogram or calorie per kilogram.
How is calorific value calculated?
Whether to lower calorific value can be found simply by subtracting latent heat of steam or both the latent heat and sensible heat in cooling from 100°C from the gcv. However, in literature, the ncv of the fuel is obtained by subtracting from the hcv the amount 2466 kJ/kg.
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