The efficiency of the gas engine is key to assessing cost benefit of biogas for electricity. The most common primary use of biogas is to provide heat to the Anaerobic Digesters that are processing the material to generate biogas. There is commonly more gas produced than required to achieve this. In that case there are a few options namely: use the biogas in a combined heat and power engine, upgrade the gas to inject into the gas network or provide vehicle fuel.
The main disadvantages of using biogas to produce electricity are the efficiency of gas engines. They may operate at a combined efficiency of 80% (i.e. for 1kWh of gas in it will produce 0.3kWh of electricity and 0.5kWh of heat). This relies on sufficient heat demand. Gas upgrade requires energy for the processing of gas but will lose very little of the stored energy in the gas which can be transported to an energy demand.
In summary:
1) Capital outlays for biogas production and use in CHP are high.
2) The efficiency of the system is only maximised when there is a local heat demand, i.e. a large majority of the inhabitants participate, or it can be attached to the local heating supply network.
I think that if persons who use biogas decrease on the amount of electricity and cooking gas then there will be a conservation in biogas
cleverly :)
The disadvantages of the biogas generators is that it is not attractive commercially and it is not feasible to locate all the location. The advantages is that it provides a non-polluting and a renewable source of energy.
Utilization of biogas (in North America) would generate enough electricity to meet up to three per cent of the continent's electricity expenditure. In addition, biogas could help to reduce global climate change. Fill in the obvious economic consequences yourself.
Biogas is used to produce electricity as it can fill up certain tubes or containers and then be filled with a luminescence that extends throughout the length of the glass, thusly filling the entire container with light.
advantages : electricity disadvantages: no electricity
advantages : electricity disadvantages: no electricity
it approximately costs 2500 USD/KW of electricity
This would entirely depend on how efficient your biogas consuming electrical generator is and what the constituent gases in the biogas are. Biogas can contain between about 50-70% methane. The available energy in the biogas is derived from the calorific value (CV) of methane factored by the concentration of methane in the biogas. If you know the efficiency of the gas engine then you can derive the energy output from the known CV of the biogas input. It is important to select a suitable generator that can run on biogas and will provide suitable warranties when operating on biogas. It may be necessary to consider the impact of contaminant gases such as siloxanes, hydrogen sulphide and moisture in the biogas. It may be appropriate to protect the engine by installing scrubbing systems to clean the gas and remove the contaminants upstream of the engine in order to improve the lifetime of the equipment.
You can use the bio gas to fuel either a steam cycle generator or a gas turbine.
You could use a Sterling Cycle heat engine.
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