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as the world attaches increasing importance to sustainable development and environmental protection, building energy conservation and carbon reduction has become one of the urgent tasks at the moment. pressing the fast-forward button on building energy conservation and carbon reduction, the market size of the building energy conservation industry continues to expand, and technological innovation and policy support have become the main driving forces for industry growth. however, some problems have also been exposed during the actual advancement process. for example, in the field of central air conditioning, it is difficult to update technology, limited space layout, high construction difficulty, lack of obvious improvement in energy efficiency, difficult maintenance and management, and difficult coordination among related parties. it has become a bottleneck restricting the development of the industry. these problems not only affect the effect of energy-saving renovation, but also increase the cost and difficulty of the renovation.

in response to the different problems of newly renovated buildings and old renovated buildings in the existing construction market, the global brand daikin has launched "all in one" professional customized solutions. with its energy-saving products, smart energy management platform, and comprehensive services content and professional technical support can maximize space utilization, shorten construction time, save renovation and operating costs, reduce energy consumption, and achieve green building energy efficiency requirements, bringing diversified innovative ideas to the entire industry.

newly built buildings with “near-zero energy consumption” daikin assists jiangsu academy of construction sciences in building low-carbon technology demonstration projects

the high energy consumption of complex central air-conditioning systems in public buildings such as office buildings, shopping malls, hospitals and schools has always been the focus of energy-saving renovation. take the hongshan scientific research comprehensive office building (phase ii) project of jiangsu academy of construction sciences as an example. the project aims to become a "near-zero energy building", "three-star green building" and "gold-level healthy building". a model of low-carbon architecture in areas with cold winters. faced with such a difficult challenge, daikin, as the hvac brand that won the bid for this project, provided an "all in one" full life cycle solution, from design, selection, installation to operation and maintenance management, helping it become a low-cost carbon technology demonstration project.

daikin air conditioning has demonstrated excellent technical strength in the project. daikin took advantage of its own bim team to conduct a large number of simulations and data calculations during the planning and design stage to continuously debug and optimize the solution. carry out lighting simulation based on the current environmental conditions such as sunlight and distance between newly built buildings and residential areas to confirm the placement of outdoor units, photovoltaic panels and other equipment; coordinate and optimize the layout of professional pipelines such as air conditioning, ventilation, and strong current bridges within the building, and use airflow to the simulation ensures reasonable indoor air flow distribution and reduces air flow dead spots; at the same time, it can also help with the prefabricated production and installation of air conditioning ducts, avoiding the waste of construction building materials and shortening the construction period. during the construction phase, daikin combined iot technology and big data analysis to continuously control quality and management progress, and realized the visualization of energy consumption, carbon emissions, and air quality through an intelligent control management platform, providing an energy-saving and low-cost solution with sustainable development potential. carbon plan.

in order to better respond to the project's goal of near-zero energy consumption and take into account the climate characteristics of nanjing such as "hot summers and cold winters, changeable spring temperatures, hot and rainy seasons, significant plum rains, and wet and cold winters", daikin selected the project for the project. the latest photovoltaic multi-connection system, high sensible heat multi-connection system and high-efficiency full heat exchanger and other energy-saving equipment systems have been installed. because daikin photovoltaic multi-springs can directly absorb the characteristics of solar photovoltaic direct current, it saves more energy by reducing intermediate losses; in addition, the project's specially configured temperature and humidity separate control energy-saving technology and fresh air heat recovery technology can separately handle indoor temperature and humidity. the introduction of outdoor fresh air significantly improves the comfort of the indoor air environment, and at the same time efficiently recovers the heat energy of the indoor exhaust air, thereby improving energy utilization efficiency and achieving the coexistence of comfort and low carbon.

since the project started in september 2023, it has been successfully capped. daikin and the jiangsu academy of construction sciences have reached a preliminary intention to jointly research a comprehensive intelligent operation and maintenance management system, promote innovation and research in demonstration projects in aspects such as source grid load storage and dc microgrid, and conduct monthly monitoring of air-conditioning operation conditions and analyze energy consumption to realize visualization, management and optimization of energy-saving behavior.

daikin energy-saving renovation of old buildings gives full play to the energy-saving advantages of multi-split units to practice green and low-carbon

the need to retrofit central air-conditioning systems in existing buildings is usually due to the aging of the equipment, high operating and maintenance costs, and the urgent need to improve energy conservation. the transformation process of different systems will also bring new risks and problems, such as how to optimize the space for re-laying indoor pipes, placing outdoor units, etc. when the water system is converted to a multi-line system; how to use old equipment and pipelines when updating the same system of multi-line systems. , save various costs and practice green and low carbon. an excellent renovation plan for building energy conservation is like injecting new life into an old building.

the case of an office building of a well-known brand of daily paper products manufacturing company in china is a typical example. before the renovation of the building, the annual electricity consumption was 570,000 kwh. after the original water system was transformed into a multi-split system, the annual electricity consumption dropped to 254,000 kwh. degree*1, the overall comprehensive energy saving of the project has been significantly improved, and the operating expenses have been reduced from 500,000/year to 230,000/year. this not only reduces business operating costs, but also provides employees with a more comfortable and healthy office environment.

since the office building of this project was built in 1998, its cold water central air conditioning system has been in operation for nearly 23 years. the problems of high energy consumption and expensive maintenance costs need to be solved urgently. at the same time, there are frequent failures and difficult maintenance. as employees' demands for air quality and comfort in the office environment increase, the old system can no longer meet the requirements.

the renovation work of this project faced the challenge of tight time and needed to be carried out without affecting daily office work. on-site investigation found that the original air-conditioning system had problems such as damage to the host-side compressor, water pump leakage, cooling towers full of dirt and serious aging, as well as aging and rusting terminal equipment, scaled water trays, damaged insulation, and poor air quality, making it difficult to retrofit. problems such as placement of outdoor units and lack of energy-saving control in digital modernization.

daikin air conditioning provides a comprehensive solution using the vrv x7 system. this system is energy-saving and highly integrated. it is compact and easy to construct. it can effectively deal with the difficulties caused by the complex pipeline system in the suspended ceiling for subsequent construction and maximize the use of building space. its intelligent management function can be personalized for different areas, realize schedule setting, room temperature setting, permission setting and other behavior management for all floors of the building, and supports remote control and monitoring.

the update and transformation of the multi-line system also faces similar difficulties. a maternal and child health hospital in shanghai has been using the daikin multi-line system since 2006. due to continuous operation, the equipment has seriously aged. in addition, as a special public building, the hospital needs to consider strict requirements on air quality, noise and other aspects when renovating and replacing central air-conditioning equipment. it cannot affect the hospital's operation during the day and can only be constructed at night. in this regard, daikin provided the vrv update q series specially developed for building renovations. the original vⅱ air-conditioning refrigerant copper pipes can be used, and only the outdoor unit and indoor unit can be replaced, which can avoid long construction periods and damage to the decoration. , and can save costs.

for renovation projects, daikin recommends ensuring the energy saving of the overall system from multiple perspectives, including equipment energy saving, energy saving in use control and data analysis, and providing normalized "all in one" full life cycle services to ensure the long-term stability of the system. stable operation.

in the "action plan to promote large-scale equipment updates and trade-in of consumer goods", the focus is on the updating and transformation of heating metering and equipment. the energy-saving transformation of central air-conditioning occupies an important position in the energy-saving work of existing buildings. however, the road to transformation is full of difficulties and technology , space, construction, energy efficiency improvement, maintenance management and other issues need to be solved urgently.

the active participation and innovative practices of daikin and other companies have brought tangible environmental and economic benefits to society through successful cases, providing strong support for the sustainable development of the industry. with the continuous improvement of energy-saving technology, building energy conservation and carbon reduction will become the new normal in the construction industry, contributing to building a greener and more sustainable future.

*1: the measurement data is based on the dimension of one year after the transformation, and the calculated data is summarized from june 2022 to may 2023.