Flexible adjustment method for indoor thermal environment

Abstract

The present invention discloses a flexible indoor thermal environment regulation method, including the following four energy storage operations from high to low according to the energy gradient when electricity prices are low at night: using outdoor air at night to exchange heat with water in the energy storage terminal to pre-store heat in the energy storage terminal; using a third cold and heat source end to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal; using a second cold and heat source end to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal; using a first cold and heat source end to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal; when the energy storage operation of the previous level cannot meet the energy storage demand, the current energy storage operation is maintained and the next level of energy storage operation is started until the energy storage demand is met. The present invention shifts the electric load by storing cold and heat, optimizes the scheduling of various cold and heat sources, and improves the energy efficiency of the system. The design concept of grade matching is adopted to improve the matching degree between the cold and heat sources and the load end, reducing conversion losses. The use of water energy storage increases the system energy storage capacity and improves the system flexibility.

Description

Technical Field

[0001] The present invention relates to the technical field of building energy conservation and environmental protection operation, and in particular to a method for flexible regulation of indoor thermal environment. Background Art

[0002] As living standards improve, people's demands for comfortable indoor temperature and humidity environments are becoming increasingly stringent. Traditional air conditioning systems, relying on a centralized cooling source, lack the ability to carefully consider the needs of individual rooms, leading to temperature fluctuations and unevenness between and within rooms. Furthermore, traditional air conditioning systems lack operational flexibility and are unable to effectively respond to seasonal fluctuations in electricity prices and renewable energy, reducing system energy efficiency.

[0003] In recent years, building heating and air-conditioning systems have evolved toward distributed systems, with the emergence of distributed terminals such as floor radiant, wall radiant, and comfort systems. These systems can create a thermally comfortable environment within rooms, but their single terminal type does not optimize system operation to a high degree. Furthermore, there is a lack of effective connectivity between central air-conditioning systems and distributed systems, preventing them from operating efficiently and synergistically.

[0004] In addition, from the perspective of energy utilization, existing technologies fail to achieve matching utilization of different energy grade gradients, nor do they take into account the grade characteristics of the load end; this leads to inefficiency in the energy conversion and transmission process. Summary of the Invention

[0005] In response to the problems existing in the above-mentioned existing technologies, the present invention proposes a flexible air-conditioning technology that can not only achieve refined indoor environmental control, but also optimize the use of timing resources to achieve energy conservation and emission reduction throughout the life cycle of the building, so as to further improve building energy conservation and indoor comfort.

[0006] The technical solution of the present invention includes:

[0007] The flexible adjustment method for indoor thermal environment includes:

[0008] Pre-buried water pipes are installed in the walls and floors of the living spaces in the building, and the walls and floors where the water pipes are buried serve as energy storage terminals. The temperature of the energy storage terminals is used as the first parameter.

[0009] providing first and second temperature adjustment terminals in the living space and the non-living space, respectively;

[0010] A room circulation water pump is provided in each living space to connect the energy storage terminal and the first temperature adjustment terminal to realize internal water circulation;

[0011] A floor circulation water pump is set on the same floor to connect all energy storage terminals and the second temperature adjustment terminal to realize water circulation within the floor;

[0012] Set the air conditioner host as the first cold and heat source end; set the cooling tower as the second cold and heat source end; set the geothermal energy exchange system as the third cold and heat source end;

[0013] The flexible indoor thermal environment adjustment method includes the following four-level energy storage operations according to the energy gradient from high to low when the electricity price is low at night:

[0014] Utilize the outdoor air at night to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal;

[0015] Utilize the third cold and heat source end to exchange heat with the water body in the energy storage terminal to pre-store heat in the energy storage terminal;

[0016] Utilizing the second cold and heat source end to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal;

[0017] Utilizing the first cold and heat source end to exchange heat with the water body in the energy storage terminal to pre-store heat in the energy storage terminal;

[0018] When the energy storage operation of the previous level cannot meet the energy storage demand, the current energy storage operation is maintained and the energy storage operation of the next level is started until the energy storage demand is met;

[0019] The energy storage requirement refers to the difference between the first parameter of the target living space and the preset temperature.

[0020] In some preferred embodiments, the method further includes setting different preset temperatures for different living spaces according to the degree of use.

[0021] In some preferred embodiments, the following energy release operation is also included:

[0022] For a single living space, a room circulating water pump is used to achieve heat exchange between the energy storage terminal and the first temperature regulation terminal;

[0023] For non-living spaces, a floor circulating water pump is used to achieve heat exchange between the energy storage terminal and the second temperature regulation terminal;

[0024] For the idle living space and the operating living space, a floor circulating water pump is used to realize heat exchange between the energy storage terminal in the idle living space and the first temperature regulating terminal in the operating living space.

[0025] In some preferred embodiments, the single living space also includes: setting a third temperature adjustment terminal near a crowded area, and using a room circulating water pump to achieve heat exchange between the energy storage terminal and the third temperature adjustment terminal to establish a local thermal comfort zone.

[0026] In some preferred embodiments, the indoor thermal environment flexible adjustment method includes a cooling mode and a heating mode;

[0027] In cooling mode, the first temperature regulating terminal and the second temperature regulating terminal include a dry coil for cooling and a dehumidifying coil for dehumidification;

[0028] In the heating mode, the first temperature regulating terminal and the second temperature regulating terminal include a heating radiator.

[0029] In some preferred embodiments, the energy storage requirements are as follows, from low to high, according to the load level:

[0030] Wall load refers to the temperature regulation load of the wall itself;

[0031] Indoor sensible heat load refers to the temperature regulation load that satisfies the comfort of indoor occupants;

[0032] Fresh air sensible heat load refers to the temperature regulation load that meets the indoor fresh air working needs.

[0033] In some preferred embodiments, in cooling mode, the fresh air sensible heat load also includes: latent heat load, which refers to the temperature adjustment load that meets the indoor dehumidification work requirements.

[0034] Beneficial effects

[0035] This invention meticulously meets the load demands of different rooms and locations within them, improving indoor thermal comfort. By shifting electrical loads through cold and heat storage, it optimizes the scheduling of various cold and heat sources, increasing system energy efficiency. Its quality-matching design concept improves the matching between cold and heat sources and loads, reducing conversion losses. It effectively connects and coordinates the central and distributed systems, expanding the system's adjustment range. Its water-based and wall-based energy storage method increases the system's energy storage capacity and enhances system flexibility. Compared to existing conventional air conditioning systems, it offers higher levels of energy conservation, emission reduction, and environmental protection.

[0036] Furthermore, by utilizing the flexible indoor environment temperature and humidity adjustment method provided by the present invention to shift the load, the demand side can actively respond to the operation adjustment of the power grid; energy saving can be achieved through peak and valley electricity prices; in summer, the outdoor thermal environment at night is better than that during the day, which can improve the operating efficiency of the air-conditioning host, thereby achieving energy saving; different loads are processed according to the load grades of wall load, indoor sensible heat, fresh air sensible heat, and fresh air latent heat, and natural energy is fully utilized to achieve energy saving; the load processing method of wall buried pipes + dry coils + dehumidification coils can also improve indoor thermal comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of a method for performing energy storage operation according to energy gradient in a preferred embodiment of the present invention;

[0038] Figure 2 A flow chart of a method for performing energy release operation in another preferred embodiment of the present invention;

[0039] Figure 3 This is a flow chart of a method for determining energy storage requirements according to load grade in a preferred embodiment of the present invention; DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0041] like Figure 1 As shown, this embodiment provides a method for flexible adjustment of indoor thermal environment, including:

[0042] Pre-buried water pipes are set up in the walls and floors of the living space in the building, and the walls and floors with the buried water pipes are used as energy storage terminals. The cold and heat storage in the present invention is achieved by heat exchange between the water pre-buried in the walls and floors and each cold source end, and then the cold and heat are stored together with the walls and floors. The efficiency of this energy storage method is closely related to the thermal inertia and energy storage performance of the building itself, the energy storage performance and thermal conductivity of the water body, and the energy storage and release performance of the indoor space. The efficiency of the pre-buried water pipe energy storage method is related to many factors such as the thermal inertia of the building materials, the layout of the water pipes, the flow rate of the water body, etc. Optimizing these factors can improve the energy storage efficiency, but considering the flexibility of the specific implementation, the present invention is not limited in these aspects.

[0043] The living space refers to the space inside the building where people often move around or live, such as offices, bedrooms, living rooms, kitchens, bathrooms, etc. The environmental conditions in these spaces will directly affect the comfort of the people and are less affected by the external ambient temperature. Non-living space refers to the other spaces in the building that are not frequently used, such as corridors, storage rooms, stairwells, etc. There are fewer people moving around in these spaces, and the impact of changes in environmental conditions on people is relatively small, and they are more affected by the external ambient temperature. On the other hand, the environment of the living space directly affects the comfort and work efficiency of the users, so it requires precise control. Non-living space is not sensitive to environmental changes and can be controlled in a more extensive manner. Distinguishing between the two is conducive to optimizing control strategies.

[0044] The temperature of the energy storage terminal is used as the first parameter. The temperature of the energy storage terminal in different living spaces needs to be obtained separately. In some preferred embodiments, in order to examine the physical comfort of crowded places in indoor spaces, the temperature of the energy storage terminal in that area also needs to be obtained. Those skilled in the art will know that there are many methods for obtaining the temperature of the energy storage terminal in the pre-buried water pipe, which is not further limited by the present invention. The location of the temperature sensor will affect the detection and response to the temperature field. By optimizing the sensor layout, the temperature parameters of the energy storage terminal can be obtained more accurately for subsequent control. In addition, the networked sensing system can also realize remote monitoring of parameters.

[0045] First and second temperature control terminals are installed in living spaces and non-living spaces, respectively. It should be understood that the temperature control terminal refers to the terminal equipment used for actual cooling or heating, and specifically includes: dry coils in air conditioning equipment, dehumidification coils in fresh air systems, buried pipes in floor heating systems, radiators in wall heating systems, etc. In some preferred embodiments, new types of radiation panels and comfort systems may also be used. Expanding the range of terminal types allows for refined handling of loads in different locations.

[0046] A room-circulating water pump is installed in each living space, connecting the energy storage terminal and the first temperature control terminal to achieve internal water circulation. The room-circulating system forms an independent temperature control unit, enabling personalized control and optimization of the spatial environment.

[0047] A floor-level circulating water pump is installed on each floor, connecting all energy storage terminals and the secondary temperature control terminal to achieve water circulation within the floor. The floor circulation system coordinates and coordinates load distribution between rooms on the floor, improving the overall regulation capacity and thermal stability of the floor.

[0048] It should be understood that each waterway system in the present invention should also be equipped with valves and other components to facilitate circulation switching. These components can be rationally configured by those skilled in the art based on existing technology and actual site conditions, and are not required by the present invention. A comprehensive waterway system can significantly improve balance and control flexibility, and is an important support for achieving the objectives of the present invention.

[0049] The air conditioner main unit is set as the first cold and heat source end; the cooling tower is set as the second cold and heat source end; the geothermal energy exchange system is set as the third cold and heat source end; in some preferred embodiments, a renewable energy power supply system and refrigeration equipment can also be set to form additional cold and heat source ends, such as a solar energy supply system and a compressor or a water cooling unit. The present invention does not consider the driving power source of the cold and heat source ends, but no matter which driving power source is used, it should be understood as a preferred embodiment of the present invention. The geothermal energy exchange system refers to a device that uses the low temperature below the surface of the earth to perform heat exchange, mainly including the following types:

[0050] Buried pipe: The pipe is buried at a certain depth underground and the low temperature of the soil is used for heat exchange.

[0051] Surface water pump: extracts low-temperature water from surface water bodies such as rivers and lakes for heat exchange.

[0052] Groundwater pump: extracts low-temperature groundwater for heat exchange.

[0053] The flexible indoor thermal environment adjustment method includes the following four-level energy storage operations according to the energy gradient from high to low when the electricity price is low at night:

[0054] Heat is pre-stored in the energy storage terminal by exchanging heat with outdoor air at night. This energy storage operation is a zero-energy natural cooling source and can be considered to have the highest energy gradient. The energy gradient refers to the order in which operations consume energy. Cooling and heating sources with lower energy consumption receive higher priority in the energy gradient.

[0055] The third cold and heat source is used to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal. This energy storage operation is a low-energy cold source with high efficiency but limited cooling capacity, and is an option with a higher energy gradient.

[0056] The second cold and heat source end is used to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal; this energy storage operation uses mechanical refrigeration cooling tower cold water, which consumes energy but is highly efficient, so the energy gradient is general.

[0057] The first cold and heat source end is used to exchange heat with the water body in the energy storage terminal to pre-store heat in the energy storage terminal; this energy storage operation directly uses the air-conditioning host to generate cooling capacity, and its energy consumption is the largest, so its energy gradient is the lowest.

[0058] When the energy storage operation of the previous level cannot meet the energy storage demand, the current energy storage operation is maintained and the energy storage operation of the next level is started until the energy storage demand is met.

[0059] In some preferred embodiments, the decision on whether to store energy can be made by comparing the total price of storing energy and not storing energy, carbon emissions, renewable energy power supply, and other quantitative factors.

[0060] The energy storage requirement refers to the difference between the first parameter of the target living space and the preset temperature. A larger difference indicates a greater energy storage requirement, while a smaller difference indicates a lower energy storage requirement. It should be understood that the preset temperature of a living space is directly related to the user's perceived temperature requirement for that living space. This perceived temperature requirement varies for different living spaces, and therefore, the energy storage requirement also varies. For example, living spaces with a high number of users at any given time (such as staff offices and living rooms) will have a lower energy storage requirement than living spaces with a low number of users (such as the general manager's office and bathrooms). Therefore, the preset temperatures for different living spaces can be appropriately set based on actual conditions (such as usage levels).

[0061] Frequency of use and occupancy density in living spaces are key factors in determining the preset temperature. For spaces with high usage and high occupancy, a lower preset temperature can be set for both economic and comfort considerations. Conversely, a higher temperature can be set. Furthermore, differences in thermal comfort levels among different occupants can also influence desired space temperature. Conducting personalized needs surveys to identify the sensory preferences of different groups can help determine a more appropriate preset temperature. Furthermore, in actual use, a temperature range can be set, allowing users to rate and provide feedback on the current temperature. After algorithmic analysis, the system continuously optimizes the temperature control strategy, dynamically aligning the preset temperature with the user's perceived temperature. Determining the preset temperature in this manner takes into account both economic factors and individual differences and comfort needs, directly impacting energy storage requirements. This is a key step in achieving refined temperature control.

[0062] like Figure 2 As shown, this embodiment is developed on the basis of the above-mentioned embodiment 1, and this embodiment provides a specific method for energy release operation.

[0063] For a single living space, a room circulation water pump is used to achieve heat exchange between the energy storage terminal and the first temperature adjustment terminal. In other preferred embodiments, considering that in a single living space, if there is an uneven distribution of people, only setting up a room circulation system often cannot meet the thermal comfort needs of a local area. Therefore, a third temperature adjustment terminal is set in the living space to be close to the crowded area, and a room circulation water pump is used to achieve heat exchange between the energy storage terminal and the third temperature adjustment terminal to establish a local thermal comfort zone. The third terminal is connected to the room circulation system and operates in coordination. When a local area experiences heat load due to the gathering of people, the third terminal responds quickly and simultaneously activates the room circulation system connected to it to provide additional regulation support.

[0064] For non-living spaces, a floor circulating water pump is used to achieve heat exchange between the energy storage terminal and the second temperature adjustment terminal; in some preferred embodiments, the building is also provided with a fan and / or heat exchanger connecting the living space and the non-living space. In this case, the return air from the living space can be directly extracted to the non-living space through the fan; and heat exchange between the living space and the non-living space can also be achieved through the heat exchanger.

[0065] For both the vacant and operational living spaces, floor-level circulating water pumps are used to exchange heat between the energy storage terminals in the vacant living spaces and the first temperature control terminals in the operational living spaces. In some preferred embodiments, a fan and / or heat exchanger may also be provided to connect the vacant and operational living spaces, allowing direct air convection between the two spaces to achieve heat exchange.

[0066] This embodiment is developed on the basis of the above-mentioned embodiment 1. The flexible adjustment method of the indoor thermal environment in this embodiment includes a cooling mode and a heating mode.

[0067] In cooling mode, the first temperature regulating terminal and the second temperature regulating terminal include a dry coil for cooling and a dehumidifying coil for dehumidification;

[0068] In the heating mode, the first temperature regulating terminal and the second temperature regulating terminal include a heating radiator.

[0069] It should be understood that the above definition does not mean that the temperature control terminal can only be a dry coil unit or a radiator in different modes, but rather emphasizes that in the corresponding mode, the temperature control terminal should at least include corresponding devices to achieve specific temperature control functions.

[0070] This embodiment is based on the above-mentioned embodiments 1 and 3. This embodiment focuses on the consideration of the quality of the relevant loads in addition to the energy gradient and the actual needs of the user when adjusting the indoor temperature. This embodiment provides a method for determining the following energy storage requirements from low to high according to the level of load quality:

[0071] It should be understood that the load grade refers to the size of the load's heat demand.

[0072] Wall load refers to the temperature regulation load of the wall itself. The wall itself has a large heat capacity, the load changes slowly, and the temperature stability requirement is low, so it is a low-grade load;

[0073] Indoor sensible heat load refers to the temperature regulation load that satisfies the comfort of indoor occupants. The load changes slowly and the temperature stability is low, so it is a medium-to-low-grade load.

[0074] Fresh air sensible heat load refers to the temperature regulation load required to meet the indoor fresh air demand. The load changes slowly and the temperature stability is low, so it is a medium-grade load.

[0075] Different energy storage methods can be used to handle the above-mentioned different levels of load. For example:

[0076] The wall load can be handled simply by using the outdoor air at night to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal;

[0077] Indoor sensible heat load refers to the temperature regulation load required to meet the comfort of indoor occupants. It can be maintained relatively stable by releasing the heat stored in the second and / or third cold and heat sources.

[0078] Fresh air sensible heat load refers to the temperature regulation load required to meet indoor fresh air requirements. This can be maintained relatively stable by releasing the heat stored in the secondary and / or tertiary heat sources.

[0079] It should be understood that in certain special circumstances, such as when there is a need for a significant cooling or heating demand in a short period of time (cooling or heating the conference room before a meeting), it may be necessary to start the first cold and hot source end to directly adjust the indoor air. This temporary adjustment method can be rationally arranged according to the adjustment principles of energy gradient and load grade gradient embodied in the present invention.

[0080] In some preferred embodiments, in cooling mode, the fresh air sensible heat load also includes a latent heat load, which refers to the temperature regulation load required to meet indoor dehumidification requirements. Those skilled in the art will appreciate that the dehumidification function of a fresh air system is achieved by utilizing the temperature difference between air and condensed water in the dehumidifier coil, causing the condensed water to condense into droplets on the coil surface and then be discharged outdoors. Obviously, the water temperature in the dehumidifier coil must be below the dew point. Cooling mode is typically used during seasons with high ambient temperatures. During these times, the cooling capacity available to the air conditioning system from the third and second cold and heat sources is relatively limited, as the water temperature is higher than the dew point (for example, the dew point in summer is typically 24°C, and the water temperature provided by the third and second cold and heat sources is clearly difficult to reach this low). Therefore, direct intervention from the first cold and heat source is necessary to ensure smooth dehumidification. Therefore, the latent heat load is the highest-level load.

[0081] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible indoor thermal environment adjustment method, characterized in that: include: Pre-buried water pipes are installed in the walls and floors of the living spaces in the building, and the walls and floors with buried water pipes are used as energy storage terminals; Taking the temperature of the energy storage terminal as the first parameter; providing first and second temperature adjustment terminals in the living space and the non-living space, respectively; A room circulation water pump is provided in each living space to connect the energy storage terminal and the first temperature adjustment terminal to realize internal water circulation; A floor circulation water pump is set on the same floor to connect all energy storage terminals and the second temperature adjustment terminal to realize water circulation within the floor; Set the air conditioner host as the first cold and heat source end; set the cooling tower as the second cold and heat source end; set the geothermal energy exchange system as the third cold and heat source end; The flexible indoor thermal environment adjustment method includes the following four-level energy storage operations according to the energy gradient from high to low when the electricity price is low at night: Utilize the outdoor air at night to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal; Utilize the third cold and heat source end to exchange heat with the water body in the energy storage terminal to pre-store heat in the energy storage terminal; Utilizing the second cold and heat source end to exchange heat with the water in the energy storage terminal to pre-store heat in the energy storage terminal; Utilizing the first cold and heat source end to exchange heat with the water body in the energy storage terminal to pre-store heat in the energy storage terminal; When the energy storage operation of the previous level cannot meet the energy storage demand, the current energy storage operation is maintained and the energy storage operation of the next level is started until the energy storage demand is met; The energy storage requirement refers to the difference between the first parameter of the target living space and the preset temperature.

2. The method for flexible adjustment of indoor thermal environment according to claim 1, characterized in that: Also includes: For different living spaces, set different preset temperatures according to usage levels.

3. The method for flexible adjustment of indoor thermal environment according to claim 1, characterized in that: Also includes the following discharge operations: For a single living space, a room circulating water pump is used to achieve heat exchange between the energy storage terminal and the first temperature regulation terminal; For non-living spaces, a floor circulating water pump is used to achieve heat exchange between the energy storage terminal and the second temperature regulation terminal; For the idle living space and the operating living space, a floor circulating water pump is used to realize heat exchange between the energy storage terminal in the idle living space and the first temperature regulating terminal in the operating living space.

4. The method for flexible adjustment of indoor thermal environment according to claim 3, characterized in that: For single living spaces, it also includes: setting up a third temperature adjustment terminal near a crowded area, and using a room circulating water pump to achieve heat exchange between the energy storage terminal and the third temperature adjustment terminal to establish a local thermal comfort zone.

5. The method for flexible adjustment of indoor thermal environment according to claim 1, characterized in that: The flexible adjustment method for indoor thermal environment includes a cooling mode and a heating mode; In cooling mode, the first temperature regulating terminal and the second temperature regulating terminal include a dry coil for cooling and a dehumidifying coil for dehumidification; In the heating mode, the first temperature regulating terminal and the second temperature regulating terminal include a heating radiator.

6. The method for flexible adjustment of indoor thermal environment according to claim 5, characterized in that: According to the load level, the energy storage requirements are as follows from low to high: Wall load refers to the temperature regulation load of the wall itself; Indoor sensible heat load refers to the temperature regulation load that satisfies the comfort of indoor occupants; Fresh air sensible heat load refers to the temperature regulation load that meets the indoor fresh air working needs.

7. The method for flexible adjustment of indoor thermal environment according to claim 6, characterized in that: In cooling mode, the fresh air sensible heat load also includes: latent heat load, which refers to the temperature regulation load to meet the indoor dehumidification work requirements.

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