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This research was based on the Life Cycle Analysis (LCA) which, using data from the constant energy outputs (electricity, heat and cooling), analyzed the input required by different technologies and compared the energy consumption of the cycle emission of GHGs.

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It can be highlighted that the source must be separated in the reference flow. In the article a relation of energy flows and the generation of greenhouse gases is made, in order to have clarity of the energy inputs and outputs and with this to be able to make clear comparisons with respect to the technologies used.

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The source of natural gas energy was compared to traditional coal-fired power generation projects with electricity purchased from the grid or generated by private power plants; the study also investigated the efficiency of renewable technology by comparing several cases with renewable energy and the case with electricity purchased from the grid. This taking into account the location of the project where wind and solar power is relatively low

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We can see how in the article the life cycle is determined by converting output energy into input, the calculation of energy consumption and the emission of greenhouse gases and with these data the comparison of technologies is made, finally be able to select the most indicated

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the Gas-based Distributed Energy System project has a desirable performance in environmental value. Compared to the traditional project, the Gas-based Distributed Energy System project appears to use 7% more energy as input, but in a life cycle view, it significantly reduces energy consumption and GHG emissions (8% and 38% respectively). In contrast to the case when electricity is purchased from the grid, natural gas has an even greater advantage.
Renewable energy limited by solar resources in Sichuan province, the Solar Energy-based Distributed Energy System project has a positive but limited effect on energy savings and emissions reduction.

It was shown that energy produced from biomass can save life cycle energy consumption by 31% compared to the case of total coal use, but the rate of emission reduction is not as significant.
Wind power significantly reduces energy consumption and GHG emissions by 35% respectively, compared to coal use