According to the article, the main researches are given by the following researchers:

1. STRACHAN
- Evaluates the difference in emissions between the distributed energy system and the traditional energy system, providing information on the sensitivity factors.

-The value of the different projects are subject to the demand and location of the users.

-It makes use of Van's calculations to evaluate the performance of heat and electricity cogeneration projects with scenarios of residual fuel sales.

 

2. DING XIAOCHUAN
-Analyze the economic viability of distributed energy system projects based on natural gas.

-The prices of gas and electricity are independent.
-The sale of heat and cooling are in your fuel costs.

-The efficiency of the refrigerator and the absorption type lithium bromide boilers is on average.

3. WAN YANLING
- Investigate the integral value of projects of the gas-based distributed energy system, with detailed calculation methods of economic value, user value, system value and environmental value.

4. WANG WEILIN
-Compare the emission of the project and an alternative case where heat, cooling and electricity are provided individually.

- The costs and fuel emissions are measured individually because they are small in renewable technology, energy consumption and emissions during the life cycle process, as the production of the machines should not be neglected. 

PHASES OF AN ACV STUDY
1. THE LIFE CYCLE INVENTORY ANALYSIS ICV 
Handles the Inventory of the input / output data in relation to the system under study and involves the collection of data and calculation procedures to quantify the inputs and outputs of a product system. 

A.      DATA COLLECTION
It collects data on energy inputs, raw materials, auxiliary inputs, other physical inputs. Products, co-products and waste and air emissions, land and water discharges.
B.       DATA CALCULATION
It performs the validation of the collected data, the relationship of the data with the unit processes and the relation of the data with the reference flow of the functional unit.
2. EICV LIFE CYCLE IMPACT ASSESSMENT
Provides additional information to help evaluate ICV results, may include an iterative process of reviewing the objective and scope of the LCA study to determine the level of compliance with the objectives of the LCA.
A.      COMPULSORY ELEMENTS 

-  It is the selection of impact categories, category indicators and characterization models Assignment of ICV results 

- Calculation of results of the category indicator 

-  Results of the category indicator 

B.        OPERATIONAL ELEMENTS : Quantifies the value of the results of the category indicator with respect to the reference information. They may be: 

-          Group 

-          Weighing 

C.       LIMITATIONS : Among the limitations, it only deals with the environmental issues specified in the objective and scope. 
In the ICV phase, such as the establishment of the system limits, which do not include all the possible unit processes for a product system or do not include all the inputs and outputs of each unit process. 
In the collection of adequate and representative inventory data for each category of impact. 

D.       INTERPRETATION OF THE ACV LIFE CYCLE 
The summary is made and the results of the ICV or the EICV are discussed. This should provide results that are consistent with the defined purpose and scope. 
It should reflect the fact that the results of the EICV are based on a relative approach. 
It tries to offer a comprehensible, complete and coherent reading of the presentation of results of a LCA 

E.        REPORTS 
Within these reports you will have to take into account the following information: 

-  Relationship with the results of the ICV. 

- Description of the quality of the data. 

- The category end points to justify. 

- The selection of impact categories. 

- Characterization models. 

-  The environmental factors and mechanisms. 

- The profile of the results of the indicator. 

The growing awareness of the importance of protecting the environment and the possible results associated with products, both manufacturers and consumers, have increased the interest in developing the means to improve and address these effects. One of the techniques developed in this sense is the life cycle analysis (LCA).

 
As the consecutive and interrelated stages of a system of a product system from the acquisition of the raw material or its generation in natural resources to the final disposal. In the present work, a compilation of information was carried out, based on a project-centered analysis, the evaluation of energy consumption and GHG emissions was carried out to compare the results of energy consumption and emissions performance.

To reduce these emissions it is important Distributed Energy which is the generation and management of electricity in a decentralized way, as close as possible to its place of consumption through, mainly, renewable energy sources such as solar, wind, biomass, biogas, or others.

Taking into account the information of the article and when relating it to the norm, it is important to indicate that the evaluation of environmental quality determines the causes of the environmental problem, taking into account the impacts that are generated throughout its life cycle, in the extraction of the mimos until Obtaining and therefore taking into account the life cycle assessment refers to what is the impact generated by a product, by the process in order to generate measures to avoid the impact generated by it. According to ISO 14044, which is used to evaluate the life cycle, it generates certain guidelines which lead to an objective, the scope of the life cycle, inventory, interpretation, limitations, related phases. 

Thus, ISO 14040: 1997 establishes that "the LCA is a technique to determine the environmental aspects and potential impacts associated with a product, which is done by compiling an inventory of the relevant inputs and outputs of the system; evaluating the potential environmental impacts associated with these inputs and outputs, and interpreting the results of the inventory and impact phases in relation to the objectives of the study. "

 

According to the previous norm, this relates that the Life Cycle Analysis has four phases developed in the following way,

o Definition of objectives and scope

o Inventory analysis

o Impact evaluation

o Interpretation of results

 

These are developed one by one in an organized manner, allowing the visualization and the behavior of each of them, which allows us to establish that the most energetic or dynamic phases are, inventory analysis and impact assessment, since here all data is collected. the information and all the data thrown are evaluated; leaving the definition of objective and Interpretation of results, as the most calm or static because in these the hypotheses of the previous phases are built allowing them to lead to where it wants to carry out research and allowing to open new ways of collecting knowledge that will help to make good use of this strategy.

For what it makes clear to us that the ACV, is a process that is fed back and enriched as it is carried out.

 

These rules make it clear to us that ACV is a great environmental management tool that can be very helpful for the decision making of organizations, when it comes to successfully developing your project or product, since it is considered beneficial to know , in as much detail as possible, the effects that their products, services or activities could cause on the environment (even if they are involuntary); in particular, those that cause significant adverse environmental impacts, to meet the legal, social and political responsibilities that they entail, in addition to economic losses and corporate image, whether used individually or in conjunction with other tools that encourage or are in charge of environmental impact management.

 

 

Thanks to the analysis of the life cycle, these organizations have allowed to develop big conclusions, because it has allowed them to provide and collect information about the sensitivity factors that heat and energy brings, besides highlighting that these factors can vary in time and these projects can generate more expensive revenues if they are not implemented immediately, since they are linked to demand.

 

 

They emphasize that one of the reasons why they focused on these investigations and that they recommend carrying out, is that in China they still use coal as the dominant energy to generate energy and also that this burning of coal brings with it many factors that affect not only life environmental, but also the quality of life of the people. The fundamental strategy to be used here would be energy and heating through solar and biosoma routes, which can be satisfied in such a way that the demand for conventional electricity will decrease and the results will be that the use of energy models will be increased, in addition to satisfying the human needs also the environment is grateful with the use of these renewable energies.

 

It is thus clear that this type of project can be used very easily because those responsible are trying to be heard by policy projectors in China, thus ensuring a greater boom in research.