Low carbon building refers to reducing the use of fossil energy, improving energy efficiency and reducing carbon dioxide emissions throughout the life cycle of building materials and equipment manufacturing, construction and building use.

At present, low-carbon buildings have gradually become the mainstream trend in the international construction industry.An often overlooked fact is that buildings account for almost 50% of the total carbon dioxide emissions, which is much higher than that in transportation and industry.The energy control of air conditioning in summer and heating in winter is the main part of carbon emission reduction in the life cycle.

The core of how a building can achieve zero carbon emission is energy storage, which is not only limited to the storage of electric energy, but also a storage of thermal energy and cold energy.

In summer, the solar energy and thermal energy are relatively abundant. The thermal energy is stored by the coolant and indirectly converted into domestic hot water. The cold source of the air conditioner is provided by the absorption refrigeration unit. The electric power of this system will be very small. It can realize self-sufficiency through solar power generation and storage for use, and realize zero carbon emission of the air conditioner in summer.

In winter, the load of the building is divided into the inner area and the outer area. The outer area needs heating and the inner area needs cooling. This kind of system has higher requirements on the coolant. In winter, the cooling in the inner area can directly exchange heat with the outdoor air through the coolant. In addition to using solar energy, the hot water in the heating area also needs to provide a backup heat source. The backup heat source uses a heat pump for heating, so as to realize the complementation of the cold energy in the inner and outer areas. In addition, the domestic hot water also needs to be produced by a heat pump.

Coolant is very important to the coupling of building cold and heat sources.On the premise of meeting the physical property requirements, the safety performance such as toxicity and flammability must also be paid attention to.Glacier coolant environmental friendly coolant is safe and stable, For the use of zero carbon energy venues.