As a traditional "big energy consumer", central air conditioning now invites tenders from the government to introduce the concept of life cycle. How to understand the concept of life cycle of central

As a traditional "big energy consumer", central air conditioning now invites tenders from the government to introduce the concept of life cycle. How to understand the concept of life cycle of central air conditioning? The traditional bidding standard of central air conditioning is often only the bidding price, and the rest is rarely considered. In fact, the life cycle cost of central air conditioning system includes economic cost, environmental cost and social cost: economic cost includes construction cost (engineering cost) and use cost, and construction cost includes planning cost, design cost and construction cost (construction cost); Operating costs include operating costs (energy consumption), maintenance costs, management costs, renovation costs and demolition costs. Environmental costs include energy consumption and environmental load. Therefore, it is good to introduce the concept of life cycle, so that the central air conditioning will move from a "big energy consumer" to energy conservation and environmental protection.