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The study shows that the China Resources Snow Breweries in Sichuan Province uses the natural gas project compared to other traditional projects which use coal and fossil fuels; This saves 8% of energy and reduces GHG emissions by 38%.
(Hansi, Xiongwen, & Xunmin, 2017)

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Distributed energy systems applying All Natural Gas projects save 31% of biomass energy consumption in the life cycle compared to traditional and still dominant projects today such as the use of coal and fossil fuels.  (Hansi, Xiongwen, & Xunmin, 2017)

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Life Cycle Analysis methods are used frequently to analyze the consumption and emissions of greenhouse gases (GHG) from renewable energy-based projects.
(Hansi, Xiongwen, & Xunmin, 2017)

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Renewable energy has great power to develop in the future for energy and emission savings, The energy system projects allow to meet the different needs of a person such as heat, cooling and electricity.
Energy models can benefit calima, reduce energy loss in transport and is economically reasonable.

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The life cycle allows to investigate the analysis of the emission difference between the distributed energy system and the traditional energy system.
Addition,  The research methods allow the analysis of the energy consumption of the life cycle and the GHG emission.

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Biomass energy contributes to saving energy consumption, but its rate of reduction of greenhouse gas emissions is not as significant compared to the distributed energy system.

Wind power reduces energy consumption by 35% and GHG emissions by 35% respectively.

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Life Cycle Analysis (LCA) method to evaluate the energy consumption and GHG
emission of Distributed Energy System projects. We studied the China Resources Snow Breweries
Natural Gas Distributed Energy System project, and designed another 5 cases with different energy
pathways to compare their energy consumption and emission performance (Hansi, Xiongwen, & Xunmin, 2017) .

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ISO 14040

The ISO 14040 standard regulates the methodology for the environmental evaluation of the visa cycle analysis of a product. We explain what is its importance and evolution.

The Life Cycle Analysis (LCA) of a product is regulated by ISO 14040. It is an environmental evaluation methodology that allows analyzing and quantifying the environmental aspects and potential impacts of a product or service throughout its cycle. of life, that is, of all stages of its existence (Envira, 2019).

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ISO 14044

The International Standard ISO 14044 was prepared by the Technical Committee ISO / TC 207, Environmental Management, Subcommittee SC 5, Life cycle analysis.

The growing awareness of the importance of environmental protection, and the possible impacts associated with products1, both manufactured and consumed, have increased interest in developing methods to better understand and treat those impacts. One of the techniques developed in this regard is the life cycle analysis (LCA).

LCA can help (Hansi, Xiongwen, & Xunmin, 2017) .

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ISO 14040
The life cycle analysis (ACV) is an environmental evaluation methodology through which all the enviromental aspects of a product, process or service can be analyzed and quantified throughout its life cycle. The study includes all stages of its existence, that is, the stages that range from the extraction and processing of raw materials, their manufacture, transport, distribution, use, reuse or recycling and the final disposal of waste.
The main function of a life cycle analysis is to provide information that helps to identify opportunities for improvement, in order to confront them with the associated risks and finally make the necessary decisions to improve environmental performance.