Overhigh temperature difference energy storage central air conditioning system and overhigh temperature difference energy storage control method

Abstract

The invention discloses an overhigh temperature difference energy storage central air conditioning system which comprises a water supplying pipe, a water returning pipe and a temperature adjusting device. The temperature adjusting device comprises an air inlet pipe, an air outlet pipe, a fresh air unit and at least one dry type coil. The fresh air unit comprises a heat exchanger, a fan, an air inlet, an air outlet, a master controller, an indoor temperature and humidity sensor, a temperature sensor and electric valves. A water supplying opening of the heat exchanger is communicated with a water supplying pipe through the electric valve, a water return opening of the heat exchanger is communicated with a water supplying opening of the dry type coil, a water returning opening of the dry type coil is communicated with the water returning pipe, and the water supplying pipe is communicated with the water returning opening of the heat exchanger through the other electric valve. The fan, the electric valves, the indoor temperature and humidity sensor and the temperature sensor are connected with the master controller. The overhigh temperature difference energy storage central air conditioning system is low in cost and high in energy storage utilization efficiency. The invention further discloses an overhigh temperature difference energy storage control method.

Description

technical field [0001] The invention relates to the technical field of central air-conditioning, in particular to a super-large temperature difference energy storage central air-conditioning system and a control method thereof. Background technique [0002] The power energy industry is one of the basic industries of the national economy. With the development of the economy and the progress of society, the demand for power energy is increasing, and the contradiction between power supply and demand is gradually highlighted. The power load of air conditioning occupies a large proportion of the peak load of the power grid, which causes the power shortage of the power grid during the peak period, and the power consumption cannot reach the minimum load of the power grid during the trough. To solve this problem, the energy storage air conditioning system came into being. The ice storage air conditioning system has been popularized and applied. [0003] In the existing energy-stora...

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Problems solved by technology

[0003] In the existing energy-storage air-conditioning system, in order to increase the temperature difference of the system’s energy storage, try to choose the air-conditioning terminal equipment with a large temperature difference. It is a good choice to choose an independent temperature and humidity control system. The fresh air unit handles the fresh air humidity introduced from the outside. In this way, the supply and return water temperature of the indoor dry coil and dry air cabinet can be selected for higher temperature supply and return water, so as to increase the supply and return water temperature and temperature difference of the whole system According to the temperature requirements of the fresh air unit, dry-type coil, and dry-type air cabinet, the energy storage tank and the refrigerator supply and return water of different temperatures, or supply and return water of the same temperature, that is, a parallel water supply and return system is adopted, and the parallel supply and return system is used. The return water system will cause the problem of small temperature difference between supply and return water. The temperature difference of the terminal equipment is generally 5-10 degrees Celsius, and the temperature difference of the energy storage tank is generally 8-14 degrees Celsius. This will increase the volume of the energy storage tank and the energy delivery system. energy consumption, thereby increasing the initial investment and operating energy consumption of the cold storage system

If the fresh air unit, dry coil, and dry air cabinet are connected in series to supply and return water, the temperature difference between the supply and return water of the system will be increased, but it is difficult to connect the fresh air unit, dry coil, and air cabinet Effective control of the temperature difference between the supply and return water will result in insufficient dehumidification of the fresh air fan, resulting in condensation in the dry coil, and the inability to balance the load of the fresh air unit, the indoor dry coil, and the dry air cabinet, making it difficult to achieve the corresponding temperature adjustment Effect

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