Distributed residual electricity consumption energy storage peak regulation system by using humidity

Abstract

The invention provides a distributed residual electricity consumption, energy storage and peak regulation system using humidity, which relates to the technical field of residual electricity consumption, energy storage and peak regulation, and comprises an indoor temperature control circulation subsystem, a preheating and precooling control circulation subsystem, a first contactor, a second contactor, a first solution tank and a second solution tank, the indoor temperature control circulation subsystem and the preheating and pre-cooling control circulation subsystem both comprise compressors, and the indoor temperature control circulation subsystem is connected with the preheating and pre-cooling control circulation subsystem. In the off-peak electricity period, the load of the compressor can be increased to consume off-peak electricity, the increased load is turned to a preheating and pre-cooling control cycle, and the solution regeneration and dehumidification process is promoted on the premise that the heat load handling capacity is kept unchanged, so that under the condition that the indoor temperature is unchanged, the absorption of off-peak electricity can be realized by slightly adjusting the indoor humidity change, and the utilization rate of the off-peak electricity is improved. And the indoor comfort degree at night in summer and winter can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of surplus power consumption, energy storage and peak regulation, and in particular to a distributed system for surplus power consumption, energy storage and peak regulation using humidity. Background Art

[0002] In order to meet the growing demand for electricity, the installed capacity of new energy sources (such as solar energy and wind power) has achieved rapid development. However, solar energy and wind power are highly unstable, which has led to a huge impact on the stability of the power grid. Due to the non-storability of electricity, power will be abandoned during off-peak periods.

[0003] The state has issued and implemented indoor air standards. In summer, the relative humidity should be 40% to 80% for cooling, and 30% to 60% for heating in winter. The suitable indoor humidity for the elderly and children is 45% to 50%, and the suitable indoor humidity for patients with respiratory diseases such as asthma is between 40% and 50%. It can be seen that the indoor humidity adjustment range is relatively wide and the available space is large. Therefore, the present invention proposes a distributed system for consuming surplus electricity and storing energy to solve the problems existing in the prior art. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity. This distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity utilizes small changes in the humidity of indoor air to absorb surplus electricity and stores valley electricity in the form of solution concentration, thereby achieving the effects of surplus electricity absorption and energy storage peak regulation, and solving the problems existing in the prior art.

[0005] To achieve the purpose of the present invention, the present invention is implemented through the following technical scheme: a distributed system for absorbing surplus electricity and storing energy for peak regulation using humidity, comprising an indoor temperature control circulation subsystem, a preheating and precooling control circulation subsystem, a first contactor, a second contactor, a first solution tank and a second solution tank, the indoor temperature control circulation subsystem and the preheating and precooling control circulation subsystem both comprising a compressor, and the indoor temperature control circulation subsystem and the preheating and precooling control circulation subsystem are connected, the output end of the first contactor is connected to the input end of the first solution tank, the output end of the first solution tank is connected to the input end of the second solution tank through a solution exchanger, the output end of the second solution tank is connected to the preheating and precooling control circulation subsystem, the output end of the preheating and precooling control circulation subsystem is respectively connected to the input ends of the first contactor and the second contactor, the output end of the second contactor is connected to the input end of the second solution tank, and the output ends of the first solution tank and the second solution tank are both connected to the preheating and precooling control circulation subsystem.

[0006] A further improvement is that the indoor temperature control circulation subsystem also includes a first heat exchanger and a second heat exchanger, the first heat exchanger corresponds to the first contactor, and one end of the first heat exchanger is connected to the second heat exchanger through a first throttle valve, the second heat exchanger corresponds to the second contactor, and one end of the second heat exchanger is connected to the first heat exchanger through a compressor, and a first refrigerant circulation circuit is formed between the first heat exchanger, the second heat exchanger, the first throttle valve and the compressor.

[0007] A further improvement is that the preheating and precooling control circulation subsystem includes a third heat exchanger and a fourth heat exchanger, the third heat exchanger corresponds to the first heat exchanger, the fourth heat exchanger corresponds to the second heat exchanger, the third heat exchanger and the fourth heat exchanger are connected via a second throttle valve and a compressor, and a second refrigerant circulation circuit is formed between the third heat exchanger, the fourth heat exchanger, the second throttle valve and the compressor.

[0008] A further improvement is that an air intake fan is provided on one side of the first heat exchanger and the second contactor.

[0009] A further improvement is that: a regenerable moisture absorbent is provided in both the first solution tank and the second solution tank, and the regenerable moisture absorbent is one of a lithium chloride solution and a calcium chloride solution.

[0010] A further improvement is that when the first contactor is a regenerator, the second contactor is a dehumidifier, the first heat exchanger is a condenser, the second heat exchanger is an evaporator, the third heat exchanger is a preheater, and the fourth heat exchanger is a precooler.

[0011] A further improvement is that when the first contactor is a dehumidifier, the second contactor is a regenerator, the first heat exchanger is an evaporator, the second heat exchanger is a condenser, the third heat exchanger is a precooler, and the fourth heat exchanger is a preheater.

[0012] A further improvement is that water pumps are installed at the output ends of the first solution tank and the second solution tank.

[0013] The beneficial effects of the present invention are as follows: during the valley power period, the distributed system for absorbing surplus electricity and storing energy for peak regulation can increase the load of the compressor to consume valley electricity, and divert the increased load to the preheating and precooling control cycle, and promote the solution regeneration and dehumidification process under the premise of maintaining the heat load processing capacity unchanged. In this way, the valley power can be absorbed by slightly adjusting the indoor humidity changes while the indoor temperature remains unchanged, and the indoor comfort level can be increased at night in summer and winter. At the same time, thanks to the strengthening of the dehumidification and regeneration process during the valley power period, the concentration difference in the two solution storage tanks becomes larger, and the valley power is stored in the form of concentration difference, which can provide a good driving force for the processing of wet loads during the day (dehumidification in summer and humidification in winter) without consuming additional load on the compressor, thereby reducing the pressure on the power grid. Therefore, the present invention utilizes small changes in the humidity of the indoor air to absorb surplus electricity and stores the valley electricity in the form of solution concentration, thereby achieving the effects of surplus electricity absorption and energy storage and peak regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the system structure framework of the present invention.

[0015] Figure 2 It is a schematic diagram of the system structure of the present invention when working in summer.

[0016] Figure 3 It is a schematic diagram of the system structure of the present invention when working in winter. DETAILED DESCRIPTION

[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0018] In the following embodiments, the components are connected via pipelines.

[0019] according to Figure 1-Figure 3 As shown, this embodiment proposes a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity, including an indoor temperature control circulation subsystem, a preheating and precooling control circulation subsystem, a first contactor, a second contactor, a first solution tank and a second solution tank. The indoor temperature control circulation subsystem and the preheating and precooling control circulation subsystem both include a compressor, and the indoor temperature control circulation subsystem and the preheating and precooling control circulation subsystem are connected, that is, the indoor temperature control circulation subsystem and the preheating and precooling control circulation subsystem share a compressor.

[0020] like Figure 1As shown, the indoor temperature control circulation subsystem also includes a first heat exchanger and a second heat exchanger, the first heat exchanger corresponds to the first contactor, and one end of the first heat exchanger is connected to the second heat exchanger through a first throttle valve, the second heat exchanger corresponds to the second contactor, and one end of the second heat exchanger is connected to the first heat exchanger through a compressor, and a first refrigerant circulation circuit is formed between the first heat exchanger, the second heat exchanger, the first throttle valve and the compressor.

[0021] The preheating and precooling control circulation subsystem includes a third heat exchanger and a fourth heat exchanger. The third heat exchanger corresponds to the first heat exchanger, and the fourth heat exchanger corresponds to the second heat exchanger. The third heat exchanger and the fourth heat exchanger are connected through a second throttle valve and a compressor. A second refrigerant circulation circuit is formed between the third heat exchanger, the fourth heat exchanger, the second throttle valve and the compressor.

[0022] The output end of the first contactor is connected to the input end of the first solution tank, the output end of the first solution tank is connected to the input end of the second solution tank through the solution exchanger, the output end of the second solution tank is connected to the preheating and precooling control circulation subsystem, the output end of the preheating and precooling control circulation subsystem is respectively connected to the input end of the first contactor and the second contactor, the output end of the second contactor is connected to the input end of the second solution tank, the output ends of the first solution tank and the second solution tank are both connected to the preheating and precooling control circulation subsystem, an air intake fan is provided on one side of the first heat exchanger and the second contactor, a regenerable desiccant is provided in the first solution tank and the second solution tank, the regenerable desiccant is one of a lithium chloride solution and a calcium chloride solution, and in this embodiment, the regenerable desiccant is a lithium chloride solution. At the same time, a water pump is installed at the output end of the first solution tank and the second solution tank.

[0023] Combination Figure 2As shown, further explanation is given in this embodiment. During the summer operation, when the first contactor is a regenerator, the second contactor is a dehumidifier, the first heat exchanger is a condenser, the second heat exchanger is an evaporator, the third heat exchanger is a preheater, and the fourth heat exchanger is a precooler. Then the output end of the regenerator is connected to the input end of the solution tank #1 (the first solution tank), and the output end of the solution tank #1 is connected to the input end of the solution exchanger and the input end of the preheater through a water pump. The corresponding solution exchanger itself has two input ends and two output ends, so the two output ends of the solution exchanger are respectively connected to the input ends of the solution tank #1 and the solution tank #2 (the second solution tank), and the output end of the corresponding solution tank #2 is also connected to the input end of the solution exchanger and the input end of the precooler through a water pump. Therefore, the function of the solution exchanger is to make the solutions between the two solution tanks exchange heat. Then the output end of the preheater is connected to the input end of the regenerator, and the output end of the precooler is connected to the input end of the dehumidifier. In the first refrigerant cycle, the output end of the compressor is connected to the input end of the preheater, the output end of the preheater is connected to the input end of the precooler through the second throttle valve (throttle valve #2), and the output end of the precooler is connected to the input end of the compressor. In the second refrigerant cycle, the output end of the condenser is connected to the input end of the evaporator through the first throttle valve (throttle valve #1), and the output end of the evaporator is connected to the input end of the compressor, and is connected to the input end of the condenser through the compressor.

[0024] Therefore, under summer conditions, outdoor hot and humid air enters the dehumidifier, the solution absorbs water vapor in the air, the humidity decreases, and then passes through the evaporator, the temperature decreases, and the air entering the room is low-humidity and low-temperature air. The concentration of the solution in solution tank #2 continues to decrease during the dehumidification process. The outdoor air passes through the condenser, which not only takes away the heat of the condenser, but also provides a good driving force for the regeneration of the solution after passing through the regenerator. The solution regenerates from a low concentration to a high concentration, and the concentration of the solution in solution tank #1 continues to increase during the regeneration process.

[0025] In the summer, during the valley power period (usually at night), the compressor load is increased to consume valley power, and the increased load is transferred to the preheating and precooling control cycle. Under the premise of maintaining the heat load processing capacity unchanged (indoor temperature control cycle), the dehumidifier inlet solution temperature is lower and the regenerator inlet solution temperature is higher, which promotes the solution dehumidification and regeneration process respectively. In this way, valley power can be consumed by slightly reducing the indoor humidity (within -10%) while keeping the indoor temperature unchanged, and the low-humidity indoor air can also improve the comfort of the indoor environment (lower humidity). In addition, the strengthening of the solution dehumidification and regeneration process can make the concentration in solution tank #1 higher and the concentration in solution tank #2 lower, so that valley power can be stored in the form of concentration difference.

[0026] During the day, the grid pressure is high and the compressor only provides cooling load but not preheating or precooling control load. At this time, the solutions in solution tank #1 and solution tank #2 with relatively high concentration difference stored during the off-peak period can handle the wet air load very well without requiring additional load on the compressor.

[0027] Combination Figure 3 As shown, when the first contactor is a dehumidifier, the second contactor is a regenerator, the first heat exchanger is an evaporator, the second heat exchanger is a condenser, the third heat exchanger is a precooler, and the fourth heat exchanger is a preheater. In winter, the outdoor dry cold air passes through the regenerator, and the air absorbs the water vapor precipitated from the solution in the regenerator, the humidity increases, and then passes through the condenser, the temperature increases, and the air entering the room is warm and humid air. After passing through the regenerator, the concentration of the solution increases, and the concentration of solution tank #2 continues to increase. The temperature of the outdoor air decreases after passing through the evaporator, providing a good driving force for the dehumidification process. After passing through the dehumidifier, the concentration of the solution decreases, and the concentration of the solution in solution tank #1 continues to decrease.

[0028] In winter, during the valley power period (usually at night), the compressor load is increased to consume valley power, and the increased load is transferred to the preheating and precooling control cycle. Under the premise of maintaining the heat load processing capacity unchanged (indoor temperature control cycle), the temperature of the solution at the inlet of the regenerator is higher and the temperature of the solution at the inlet of the dehumidifier is lower, which promotes the solution regeneration and dehumidification process respectively. In this way, valley power can be consumed by slightly increasing the indoor humidity (within +10%) while keeping the indoor temperature unchanged, and the indoor comfort level (higher humidity) can be improved at winter nights. As the regeneration and dehumidification processes are strengthened, the solution concentration difference between solution tanks #1 and #2 continues to increase, and valley power is stored in the form of a high concentration difference solution.

[0029] During the day, the grid load is large and the electricity consumption pressure is high. The compressor only provides heat load. Thanks to the high concentration difference solution in the two solution storage tanks during the valley period, the daytime indoor wet load demand can be well met without additional consumption of the compressor load.

[0030] The present invention can effectively absorb valley electricity in a region in summer by slightly adjusting the household humidity in a region. At the same time, the high-concentration difference solution stored during the valley electricity period can provide a good driving force for the air wet load treatment during the peak electricity period without additional consumption of the compressor load, thereby achieving the valley electricity absorption and energy storage peak regulation.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the framework and scope of application of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A distributed system for absorbing surplus electricity and storing energy for peak regulation by using humidity, characterized in that: It includes an indoor temperature control circulation subsystem, a preheating and precooling control circulation subsystem, a first contactor, a second contactor, a first solution tank and a second solution tank. The indoor temperature control circulation subsystem and the preheating and precooling control circulation subsystem both include a compressor, and the indoor temperature control circulation subsystem and the preheating and precooling control circulation subsystem are connected. The output end of the first contactor is connected to the input end of the first solution tank, the output end of the first solution tank is connected to the input end of the second solution tank through a solution exchanger, the output end of the second solution tank is connected to the preheating and precooling control circulation subsystem, the output end of the preheating and precooling control circulation subsystem is respectively connected to the input ends of the first contactor and the second contactor, the output end of the second contactor is connected to the input end of the second solution tank, and the output ends of the first solution tank and the second solution tank are both connected to the preheating and precooling control circulation subsystem.

2. According to claim 1, a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity, characterized in that: The indoor temperature control circulation subsystem also includes a first heat exchanger and a second heat exchanger, the first heat exchanger corresponds to the first contactor, and one end of the first heat exchanger is connected to the second heat exchanger through a first throttle valve, the second heat exchanger corresponds to the second contactor, and one end of the second heat exchanger is connected to the first heat exchanger through a compressor, and a first refrigerant circulation circuit is formed between the first heat exchanger, the second heat exchanger, the first throttle valve and the compressor.

3. According to claim 2, a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity, characterized in that: The preheating and precooling control circulation subsystem includes a third heat exchanger and a fourth heat exchanger, the third heat exchanger corresponds to the first heat exchanger, the fourth heat exchanger corresponds to the second heat exchanger, the third heat exchanger and the fourth heat exchanger are connected through a second throttle valve and a compressor, and a second refrigerant circulation circuit is formed between the third heat exchanger, the fourth heat exchanger, the second throttle valve and the compressor.

4. According to claim 1, a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity, characterized in that: An air intake fan is disposed on one side of the first heat exchanger and the second contactor.

5. According to claim 1, a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity, characterized in that: The first solution tank and the second solution tank are both provided with a regenerable moisture absorbent, and the regenerable moisture absorbent is one of a lithium chloride solution and a calcium chloride solution.

6. According to claim 3, a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity, characterized in that: When the first contactor is a regenerator, the second contactor is a dehumidifier, the first heat exchanger is a condenser, the second heat exchanger is an evaporator, the third heat exchanger is a preheater, and the fourth heat exchanger is a precooler.

7. According to claim 3, a distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity, characterized in that: When the first contactor is a dehumidifier, the second contactor is a regenerator, the first heat exchanger is an evaporator, the second heat exchanger is a condenser, the third heat exchanger is a precooler, and the fourth heat exchanger is a preheater.

8. The distributed system for absorbing surplus electricity and storing energy for peak regulation by utilizing humidity according to claim 1, characterized in that: The output ends of the first solution tank and the second solution tank are both equipped with water pumps.

Images