1, control the window wall ratio
Since the heat consumption of the external windows accounted for 35% to 45% of the total building total heat consumption, therefore, under the premise of guaranteeing indoor lighting; reasonable determination of the window wall ratio is very important. General provisions of the direction of the window wall ratio shall not be greater than the following figures: north to 25%; east and west to 30%; south to 35%.
2, improve the airtightness of windows and doors
Room air changes from 0.8h-1 down to 0.5h-1, the building's cold consumption can be reduced by 8% or so, so the design should be used in the airtightness of good doors and windows. Adding sealing strip is an important means of improving the airtightness of doors and windows.
3, the popularization and application of external insulation building
After years of practical application, proved that the use of this type of thermal insulation system of the building, whether it is from the building decorative effect or the comfort level of living, it is a worthwhile to promote the application of energy-saving new technologies around the world.
Two, air-conditioning equipment, energy saving
1, the addition of ice storage system
Ice storage system that is: the use of air-conditioning in the building in all or part of the required cold load in the non-use of air-conditioning time to prepare, the energy stored for use in air-conditioning. The total energy consumed by the host of the system does not change much, but you can use electricity at low peaks, and less or no electricity at peaks - balancing the peaks and valleys of the grid load, slowing down the construction of power plants and power supply and distribution facilities, is a recommended energy-saving methods. Through several projects in Hangzhou, such as: CCB Hangzhou branch office building, Hangzhou, the practice of the new Jingfu department store building shows that the system energy saving (economic indicators) can be between 25-35%
.
2, the application of frequency conversion technology
With the development of control technology, different types of chiller units have a more complete automatic control of the regulating device can automatically adjust the operating conditions with the load changes, to maintain high efficiency operation. Air conditioning units, terminal equipment and pumps and other equipment using frequency control, you can make the part of the equipment to reduce energy consumption by more than 30%.
3, optimize the selection of air-conditioning units and terminal equipment
Domestic fan coiler from the overall level of similar products abroad compared to about the same, but with the advanced level of comparison with foreign countries, the main gap is the power consumption, coiler weight and noise. Therefore, the design must pay attention to the selection of light weight, unit fan power cooling (heat) large units. Air conditioning unit should be selected unit fan air volume, air pressure matching reasonable, less air leakage, air delivery coefficient of the unit.
Three, strengthen the air conditioning system design.
1, strengthen the program or system selection
For most of the comfort air-conditioning requirements, does not require very strict temperature and humidity control. Variable air volume system can overcome these shortcomings, it can be sent to the room (or area) by changing the air volume to go to the method, to meet the needs of these places load changes. Of course, the total air volume of the whole system is also changing. Therefore, the variable air volume system in operation is a kind of energy-saving air conditioning system. In this way, the capacity of air-conditioning equipment can also be reduced, both to save investment in equipment costs, but also to further reduce the system's operating energy consumption. Another example: the use of electric two-way valve through the air-conditioning end of the water flow control, so that the flow follows the changes in the load, coupled with the application of frequency conversion technology, so as to achieve the purpose of energy saving.
2, strengthen the design calculation
At present, the air-conditioning water system there are many problems, such as. Selection of pumps is based on the design value of the pump samples to find the nameplate parameters determined, rather than by the pump's characteristic curve selected pump number; the pressure difference between the circuit has not taken effective measures, so the hydraulic, thermal mismatch phenomenon is serious; large flow rate, the small temperature difference phenomenon prevails. Water system energy saving should start from the following aspects: designers should pay attention to the water system design, water system related coefficients, the actual implementation of energy-saving design standards require values.
Four, strengthen the operation and management of the system
Strengthen the training of air conditioning operators, improve the quality of management personnel, the implementation of air conditioning operators operating license system. The implementation of various regulatory and energy-saving measures, are directly related to the technical quality of operators; have the necessary knowledge of refrigeration and air conditioning; to know how to adjust according to changes in outdoor parameters; to know how to adjust the energy saving. Centralized air-conditioning implementation of metered charges, is a basic measure of building energy-saving. According to foreign research data show that: the implementation of centralized air conditioning metered charges, its energy-saving rate of 8% to 15% above the air-conditioning energy-saving part of the measures, with the development of technology, more and more energy-saving technologies applied to the HVAC profession. Energy saving is everyone's obligation. As an HVAC professional workers, should be in the field of air conditioning energy saving to actively strive for all possible energy recovery.