Energy efficiency of HVAC systems in buildings occupy an important position in, plays an important role in research, development and application of energy-saving technologies is the basis of energy-saving HVAC systems, building systems, the attention and support of the functional departments at all levels, is to achieve substantial energy and produce significant environmental and social benefits, guarantee for promoting economic development.


With the development of the economy, energy and environmental problems more acute. On a hot summer day, we all realized the vital energy of tension. Can be predicted. The situation will continue in the future, and getting worse. Progress of science and technology. The HVAC field new technologies emerge, experts say we can use the following methods to achieve energy-saving HVAC systems.


Carefully designed HVAC system and keep it running in the efficient and economic conditions


Heating, ventilation and air conditioning system in particular is a large and complex system of central air-conditioning system, the system design will directly impact system performance. Such as system is designed according to the load, and the actual operation is in partial-load operation, if each part of the system design does not meet the requirements of part-load running, long running at high load that the energy consumption of the system is very large. And if fresh air system design, the system should be able to change with the outdoor weather parameters change the volume. To minimize the opening time of the host. Can say that energy saving of air conditioning system design for system plays an important role.


Improve the structure of building maintenance and insulation, reducing heat loss


We know that for heating, ventilation and air conditioning systems, and by maintaining the structure of a large proportion of air conditioning load. Maintenance structure thermal insulation properties maintenance General heat transfer coefficient is the size of the structure, which decides the size of air conditioning load by maintaining the structure. So the country has issued the design specifications and standards, the first requirement is to improve the structure of thermal insulating properties.


Enhance control level of the system, adjust the indoor thermal environment parameters, minimizing the energy consumption of air-conditioning system


Especially comfort air conditioning system of air conditioning system's effect on humans is through the air temperature, humidity, wind speed, mean radiant temperature of the environment of the body feeling hot and cold on the environment are the result of these environmental factors. Air conditioning control method in the past is just measurement and control the temperature and humidity of air, or even just the air temperature. Is certainly not comprehensive, is bound to cause many problems, like the air conditioning system's effect on humans is not direct, when the environment changes in environmental regulation do not move quickly, the body feels uncomfortable, this mode of regulation of the air conditioning system does not save energy. The application study on heat and moisture environment, and for the introduction of a new form of control method provides a theoretical basis. If comfort index that is somatosensory index as air conditioning systems and control parameters. If use PMV or SET indicators to control air conditioning systems can not only solve the ills of traditional control methods, and you can achieve substantial energy efficiency, according to our preliminary studies. This method can be used in conditions of comfort and energy saving of air conditioning system 30%.


New comfortable and healthy air-conditioning


As noted above, numerous environmental parameters affecting the thermal comfort of human body, different environmental thermal comfort parameter combinations you can get the same effect, but with a different thermal environment parameters of air-conditioning system energy consumption is not the same. In winter, for example, if we use traditional methods of air conditioning, indoor air heating fan, heat and moisture exchange of humans and the environment through the air. Requires higher air temperatures, this time by maintaining the structure of the heat loss and heat loss for heating air are quite large. If we study on heat and moisture environment, changing the way conventional air conditioning, increased radiant heat (such as low-temperature floor radiant heating system), the required air temperature drop declined significantly, can generally be 18~20 degrees, while the traditional way at L8~20 degrees, obviously the latter than the former has significant energy saving effects. During the summer have similar results.


Promote the use of renewable or low grade energy air-conditioning system


With wide application of air conditioning systems, air conditioning on fossil energy consumption will rise dramatically, as well as damage to the ecological environment is also increasing. How to use renewable energy and low grade energy has become an important research topic in the field. Ground-source heat pump air conditioning system is in this situation developed, using underground temperature COP values soil heat significantly improved air conditioning system makes equal heating (or cooling) amount energy consumption drastically. In addition, solar heating or cooling technology in research and development.


Study on cold recycling of used work carried out. To achieve maximum utilization of energy


Currently many hot and cold air conditioning system recycling research also flourished, such as exhaust air heat recovery air conditioning systems. Condensation heat transfer of hot water supply in the summer, are hot and cold on the system of recycling, and significantly improve the energy efficiency of air conditioning system.