The 3 major advantages of distributed energy system
The heating problem is extremely important. In fact, by the first energy is nothing but the heat utilization, electricity use, power utilization and material conversion
Use, the groan, a nearly 2 / 3 of the energy is consumed in the form of heat in the end use. Heat energy belongs to low grade energy, and
Often to the high quality of fossil fuel supply, the grade of the serious mismatch, irreversibility of high society, is the inefficient use of energy.
The main source of environmental stress. In fact, to change this potential is enormous, measure not unbelievable, it just
Requirements in the hot occasion to make full use of the concept of total energy system, a comprehensive grasp of the efficiency of energy use, but it does not implement this concept is
Not the same.
No heat users only need to meet the user requirements of heating, room temperature only 20 degrees. From Figure 2 that, when the fuel consumption theory
The lowest limit but 2.68kg standard coal / GJ (heat), but by the conventional furnace heating total exergy efficiency value is about state, corresponding to a single heating fuel
Consumption is 67kBc E / rJJ, in order to reduce the fuel consumption of heating is to set the system described in the previous section, the force of these subsystems
The efficiency of the smoke to bureau. Specific technical measures usually is the introduction of cogeneration and related technical scheme. However, cogeneration
The implementation is restricted in the large energy system. These two kinds of energy in the form of heat and electricity have great differences in transmission and distribution characteristics. Electrical a
System requirements as far as possible, regional network and national network; and the heat transmission and distribution range to less than 5 10km for reasonable, otherwise
The fixed costs and operation costs rising sharply. Heating scale is not suitable for too much, scale is large, it is difficult to predict the thermal load, i.e.
The prediction accuracy, is also very difficult to guarantee the production, distribution and consumption of the harmonic. The experience proved repeatedly, cogeneration does not succeed by
In the design production capacity and transmission capacity and the actual load caused by serious mismatch. The heat and electricity together to implement cogeneration, Gu
This may be impossible. The system is, the more problems.
Distributed energy system is not. This system is small in size, is itself a general, system requirements, cascade utilization of energy, thermal power
One of the cascade utilization of cogeneration is the ideal way to. In this energy in the system is to achieve cogeneration small easily. Still the heating
As an example, introducing small cogeneration can put the total smoke efficiency is increased from 4% to 8, usually boiler, heating fuel corresponding single
Consumption can be obtained from the 67kgc E / GJ down to 32kgc E / GJ level. A further, facilitates the implementation of demand side management in distributed energy system
Science, to improve the user end is also incorporated into the energy saving account, can try to improve efficiency of the smoke user radiator. The same
When, because of distributed energy system is in the load center, facilitate the use of direct heating. Heating the form without a net and
The two network, in the network without heat exchanger connected network and network, heat transmission smoke much higher efficiency. Using the above two measures at the same time
Can make the supply water temperature by loo / g / 70 ℃ is reduced to 55 / 35 ℃ can still ensure the heating quantity, so that the heating energy system efficiency.
From 8.5% to 20%, fuel consumption corresponding heating can be obtained from the 32kxcc / (JJ further reduced to Dk8G E / GJ. In addition, divided
One of the best form of distributed energy system is the efficient use of natural gas, if the use of natural gas to 6Mw steam turbine cycle into
Gas and steam combined cycle cogeneration, the total efficiency of the smoke finally can reach as high as 55%, and the heating fuel consumption is only 5kBc.e / GJ.
As can be seen, the characteristics of distributed energy system based on the use of cogeneration, only the advanced technique of current, it might be possible to
The same energy terminal heating under consumption so greatly reduced, this is the strategy of sustainable development an
Contribution. In the global warming today, pJ significance of the implementation of the concept of a class of total energy system. Fossil fuel is ultimately a limit
Resources, in essence is not sustainable, the future sustainable energy alternatives is inevitable. To study and explore unremittingly
Sustainable energy brought feasibility in technology and economy, is an important component of the energy strategy in the new century. Hydropower, biomass
Energy, solar energy, geothermal energy, wind energy, ocean energy is a sustainable energy contemporary technology feasible, these renewable energy is not
Energy of hope. The rational use of the form of distributed energy system is small hydropower and renewable energy.
In developed countries, distributed energy system first appeared in the twentieth Century 70's, in these countries, centralized power system
It has reached a considerable degree of maturity, have reached a certain sense of saturation. In this big background under the strategy of sustainable development, and L
Energy conversion and utilization technology, such as micro turbine machinery, fuel cell technology, make people in distributed
There may be the energy in the system to such a target, even if the unit and the system is not big enough, technology - L is still feasible, economically
Is reasonable, and has a superior environment compatibility. In addition, energy and the electric power market, but also to promote distributed energy
One of the driving factors of system. Due to the energy industry from monopoly countries towards liberalization and the relaxation of control, so that
People not only consider the problem from the energy production, but the energy conversion, production |
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