Ice making air source heat pump

Abstract

An ice making evaporator is added on an air source heat pump, multiple loops can be formed, multiple modes and multiple working conditions of air source heating, ice making heating, heat storage, icemaking cold storage, and direct refrigeration are operated, a cooling tower does not need to be matched, ice making heating can be achieved, a water source facility is not needed, ice treatment measures are not needed, one device is adopted to achieve the aims of efficient clean heat supply, peak clipping valley filling energy-saving cold supply and efficient heat supply under the ultra low temperature environment, the distribution low cost direct cold heat energy storage mode is achieved, the energy-saving and environment-friendly aims of the cold and heat supply can be achieved in an economic manner, and the effective buffering and stable foundation is provided for new energy power generation efficient running.

Description

technical field [0001] The invention relates to the technical field of heating, ventilating and air conditioning, in particular to an ice-making air source heat pump. Background technique [0002] At present, China's urbanization is developing faster and faster. Air conditioning, heating, and hot water have become indispensable rigid demands in the life and work of people in modern cities. They have already accounted for about 2 / 3 of the energy consumption of buildings About 22% of energy consumption; China's current mainstream technology still uses coal-fired heating + air-conditioning for cooling, two sets of cooling and heating systems, double investment, high energy consumption for cooling and heating, and coal-fired heating is caused by smog The main culprit is the air-conditioning load, which is the main culprit for the peak load of the power grid in summer. From the perspective of my country's national conditions and the experience of developed countries, the optimized ...

AI Technical Summary

Problems solved by technology

[0002] At present, China's urbanization is developing faster and faster. Air conditioning, heating, and hot water have become indispensable rigid demands in the life and work of people in modern cities. They have already accounted for about 2 / 3 of the energy consumption of buildings About 22% of energy consumption; China's current mainstream technology still uses coal-fired heating + air-conditioning for cooling, two sets of cooling and heating systems, double investment, high energy consumption for cooling and heating, and coal-fired heating is caused by smog Air-conditioning load is the main culprit for the peak load of the power grid in summer. From the perspective of my country's national conditions and the experience of developed countries, the optimized solution should be air source heat pump heating + ice storage for cooling.

[0003] The heat source of the air source heat pump comes from the air. The advantage is that air is inexhaustible as a heat source. It uses electric energy for heating, which is efficient, energy-saving and environmentally friendly. Power consumption (cooling EER3.0 or so, power consumption is almost twice that of chillers)

[0004] Water-cooled chillers are high-efficiency and energy-saving refrigeration devices. At present, they are the first choice for cooling large buildings. Because of the large cooling demand load of buildings, the configuration of refrigeration units needs to meet the maximum cooling load in summer. The configuration power is large and the investment in equipment is large; and because there is no Low-temperature heat source, cannot be used for heating and heating, and is completely idle in winter

Its advantage is high cooling efficiency; the disadvantage is that expensive peak power must be used, resulting in peak load on the grid, and cooling towers are required to dissipate heat, and heating cannot be provided

[0005] The conventional ice storage air conditioner is an energy-saving upgrade product of water-cooled chiller units. The advantage is that it can use low-priced off-peak electricity instead of expensive peak electricity, which can cut peaks and fill valleys for the power grid, save energy and reduce emissions, and save electricity bills for users; the disadvantage is that it is expensive and cannot be used for heating For heating, a cooling tower is required to dissipate heat

[0006] Patent application 201711360053.4 provides an energy-saving dynamic slab ice heat pump. In summer, low-cost valley electricity is used to make ice for ice storage instead of high-price peak electricity for cooling during the day. In winter, the heating source uses unfrozen water above 0°C to make ice for heating; Advantages: 1. It can use the latent heat of water-ice phase change for heating, and the heat source is relatively sufficient. Water from urban sewage can be used. 2. The heating has nothing to do with the ambient temperature. Even at an ambient temperature of -50°C, the heating COP can reach about 3.3. 3. High-efficiency ice production and ice storage for cooling in summer can greatly save electricity costs, and at the same time cut peaks and fill valleys for the power grid; Disadvantages: 1. There are certain restrictions on water sources in urban sewage, and water source facilities require investment. 2. A large amount of by-product ice sand Need to be treated, 3. Not suitable for heating in water-scarce areas; suitable for: 1. Cooling and heating in areas with convenient water sources such as sewage water, 2. Subdivided fields where ice sand can be used as resources

[0007] Patent application 201820700004.4 provides an air-water dual-source heat pump. In summer, low-cost valley electricity is used to make ice for ice storage instead of high-price peak electricity for cooling during the day; in winter, the air source heating mode is operated at an ambient temperature above -5°C, which is highly efficient and energy-saving. , and no water consumption, at an ambient temperature below -5°C, run the ice-making and heating mode, the heat pump unit not only maintains high efficiency and energy saving, but also consumes less water, reducing the total water demand and ice processing volume of the heat pump unit during the heating season; advantages : 1. It can use the latent heat of water-ice phase change for heating, and the heat source is relatively sufficient. It can use urban sewage water. 2. Both high ambient temperature and low ambient temperature are efficient for heating. 3. Efficient ice production and ice storage for cooling in summer. It can greatly save electricity costs, and at the same time shave peaks and fill valleys for the power grid; Disadvantages: 1. Ice making and heating in low-temperature environments still require water sources, and water source facilities require investment, and are not suitable for heating in water-scarce areas. 2. By-product ice sand still needs external Row treatment, ice treatment facilities need investment, 3. In summer, cooling towers are also required to dissipate heat

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