In the context of green development and sustainable development, in response to the national policy of “carbon neutrality and peak carbon dioxide emissions”, we will fully implement clean energy heating and reduce air pollution. Air energy is the representative, bringing the comfortable, efficient, safe and energy-saving environment to people. For an office building in Nanjing, which is located in hot-summer and cold-winter zone, an air source heat pump unit is designed as a cold and heat source system to meet the demand for heating in winter and cooling in summer. At the same time, compared with the traditional cold and heat source system which is designed central heating in winter and multi-line refrigeration in summer, the result of economic analysis shows that the use of air source heat pump as the cold and heat source system of office buildings is more economical and energy-saving. It is suitable to popularize and apply in China’s hot-summer and cold-winter zone.
The development of e-commerce economy has led to the emergence of new types of legal relationships. The promotion of administrative litigation models should be an approach to promote strengths and avoid weaknesses, whether online or offline. Exploring the advantages of the online litigation model can speed up the processing rate of administrative cases. Relying on big data will also help trial judges accurately locate administrative litigation cases and save judicial resources. Under the background of "Internet +", how to make full use of big data to further advance the online litigation model and solve the problems in judicial practice has become an urgent priority.
Air curtain is a widely used heat insulation equipment in the market, which reduces the heat exchange efficiency of both sides by the air surface formed by jet. In order to reduce the use of electric heating device in air curtain, a new air curtain is designed by the coupling experiment of air source heat pump and electric heating. The air curtain fan is preheated by the condenser of air source heat pump, so as to reduce the dependence of air curtain on electric heating parts, and save energy consumption.
In this paper, through the experimental study of two heating seasons, it is found that the heat pump installation position and orientation, circulating pump work/frequency conversion, frosting conditions, etc. have a greater impact on the heat pump unit energy efficiency ratio. According to the actual operation data and theoretical derivation, the analysis shows that the energy efficiency ratio increases by 2.4% when the installation position and orientation increase the air temperature by 1K. The circulating water pump can save 78% of the power consumption in the period by changing the power frequency to frequency conversion. The frosting condition diagram can make a reasonable configuration and operation prediction for the heat pump system.
Air-source heat pumps are highly valued in many fields because of their energy-saving and efficient characteristics and they have a good market prospect. However, with the continuous development of heat pump technology, the thermal barrier coating materials used in air-source heat pumps seriously limit their growth. Nanoparticles are the smallest microparticles found at present. They have many excellent characteristics, and the nanomaterials made of nanoparticles have surface activity that ordinary materials do not have. Based on this, this paper combines nanostructures with thermal barrier coatings to study the application of thermal barrier coatings based on nanocomposites in heat pump systems.
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