Ground source heat pump system engineering specifications What are the categories? Analysis of advantages and disadvantages of ground source heat pump system

In recent years, with the gradual popularity of ground-source heat pumps and large-scale promotion, based on the use of ground-source heat pump experience, user pain points surfaced, and the corresponding solutions came into being, the following detailed "source What are the classification of heat pump system engineering specifications? Analysis of advantages and disadvantages of ground source heat pump system ", details are as follows: What are the technical specifications of ground source heat pump system? In recent years, ground source heat pump has been a large number of applications and rapid development, but also exposed a lot of serious or even difficult to reverse the problem, such as long-term use in some areas, the soil temperature continues to decline or rise, the impact System operating efficiency; some systems refer to surface water but ice phenomenon, resulting in decreased energy efficiency or even simply downtime. In response to such issues, the concept of system integration innovation was put forward by the industry. The principle is very simple, that is, with new technologies and new systems to transform the traditional ground source heat pump system, or the integration of new technologies, new systems and traditional methods of technical elements can be referred to as heat pump air conditioning integrated system, composite ground source heat pump system Or hybrid system. Diversification of heat sources is a fundamental issue in this process. There are many types of heat pump heat sources and their characteristics are not the same. How to integrate these heat sources so that they can give full play to their advantages and combine them into new heat sources to improve the operation characteristics and precision of the heat pump is the exploration direction of the current industry. Large market experts believe that air conditioning and refrigeration, the following models are worth learning: First, ground surface water tube ground source heat pump system. Surface water is more optimistic in some areas, especially in southern cities, but the low winter temperatures are also common problems and often drop below 4 ° C in the hot summer and cold winter. In this regard, the use of series buried pipe and surface water integrated system (dual heat source system), when the winter temperature is low, the buried pipe dropped to allow the unit within the water through the first heat it, and then into the buried pipe, change Heat back to the unit, so that both the unit of surface water and soil heat, reducing the problem of low surface water temperature. It should be noted that, when the surface water temperature is too high, the buried pipe should be closed, making it a single surface water source heat pump system. The local surface water temperature is normal, but when the water is small, the need for appropriate measures. Second, buried solar hybrid ground source heat pump system. As we all know, solar energy is endless, pollution-free clean energy, but also the most promising energy source after the 21st century. But solar energy is also an "unstable" category. At present, the annual sunshine time in our country accounts for two-thirds of the area in more than 2,000 hours. Considering the unsafe and unreliable factors such as overcast weather and nighttime, it is possible to make buried pipe and solar energy composite system. From the perspective of heating safety, buried pipes must be designed at full capacity to meet the most adverse conditions. At the same time, from the economic point of view, solar energy is completely free of charge, so in the integrated system must give priority to the use of solar energy and make full use of, to be safe and economical, we need to consider and solve the problem from the operating mode. Third, groundwater seawater source heat pump composite system. Some of China's ports and islands are very rich in available seawater resources, the summer water temperature is usually 20 ℃ 30 ℃ range, is an ideal source of cooling water. Winter part of the water temperature dropped to 0 13 ℃, and even the surface icing conditions. In such a situation, a project in Tianjin Binhai New Area uses the operation mode of groundwater and seawater source heat pump combination to make full use of seawater resources and ensure system stability and safety. Fourth, indoor waste heat can be used as a resource, that is, water ring heat pump air conditioning system. The project can introduce and combine the energy of solar energy, water, air and soil. If the energy is lower, the corresponding heat pump can be introduced into the system to replace the boiler with auxiliary heating to form solar water-ring heat pump air-conditioning system or well water source water Central heat pump air conditioning system, soil source water ring heat pump air conditioning system, air source water ring heat pump air conditioning system and other composite modes of operation. Fifth, buried pipe heat pump ice storage heat pump system. In a project in Beijing, this system is buried underground according to the winter heating load design. Since the air-conditioning load is greater than the heating load, it is difficult to meet the operation demand in summer. The difference is just solved by the ice storage system, not only for the grid resource, Peak filling the positive role, users also enjoy the preferential tariffs, so that operating costs. Sixth soil storage soil heat pump coupling integrated system. This concept combines a cold storage unit with a heat pump underground heat sink to provide integrated system heat pump, cold storage and air conditioning via a chiller unit. Although this compound model is the original innovation of thermal storage air conditioners through soil cold storage, it faces many problems, including simulation and simulation. The problems of thermal characteristics and cold loss of soil cold storage and cold storage Need to study carefully. In addition, natural cooling ground heat pump system and split air conditioner hot water supply air conditioning systems and other innovative composite mode. In particular, the latter has achieved commercialization, but many details still need to be discussed, and incomplete solutions will affect their own development. With the support of the State's "12th Five-Year" policy, the total area of ​​geothermal energy supply in China is expected to reach 350 million to 400 million square meters in 2015, and some experts predict that the total market for geothermal energy development and utilization will exceed 700 billion yuan. This shows that this market The huge, bright future. In a word, scientific and rational development is the key to achieving healthy growth in the ground-source heat pump industry. We must not metaphysically pursue the "Great Leap Forward." Ground-source heat pump market is a "double-edged sword", for which to have four points: First, the complex heat pump air conditioning system in many forms, should be based on different integrated innovation goals, put forward different system forms. Second, the system innovation to promote the development of ground-source heat pumps, must be organic rather than mechanical patchwork. At present, there are not many projects that are "co-located", which should attract high attention, especially for low-quality projects that have been made for some policy subsidies. Second, innovation should start from the project, in order to save energy, save money as the basic principle, only save energy or save money or energy saving are not sustainable. Finally, to strengthen the simulation forecasting of hybrid systems, while strengthening the development of automatic control systems to jointly promote the complex system. [Editor's note] Asian pump network Reason to believe that as technology matures and the audience gradually enlarge, ground source heat pump will benefit more people's livelihood. Industrial Internet (Xiamen) Technology Co., Ltd. Asia Pump Network (CEO QQ / WeChat :) Editor: Spring (QQ / WeChat :) (Service Hotline:)