Building temperature adjustment, emergency heating and subsidence monitoring method based on wax pool foundation

Abstract

The invention discloses a building temperature adjustment, emergency heating and subsidence monitoring method based on a wax pool foundation, and belongs to the field of building safety, environmental protection and energy conservation. According to the method, a paraffin heat storage pool in a foundation is driven through a roof solar photovoltaic panel, and the comprehensive functions of day and night temperature regulation and control, cold-wave emergency heating and foundation subsidence monitoring of a building are achieved at the same time. Solar energy is used for heating foundation paraffin in the daytime, phase change heat storage is achieved, heat is released at night, it is ensured that the room temperature is stable, and dependence on battery energy storage is reduced. In cold and damp weather, the paraffin can be used as fuel for emergency heating, and it is guaranteed that the room is kept in a livable temperature state in extreme weather. In addition, the system achieves dynamic monitoring and early warning of foundation subsidence by monitoring paraffin liquid level changes, and construction safety is ensured. The method has the advantages of being low in cost, environmentally friendly, economical, high in adaptability and the like and is suitable for being widely applied to rural single-storey buildings.

Description

Technical Field

[0001] The present invention belongs to the field of building safety, environmental protection and energy conservation. More specifically, it relates to a "solar energy-wax pool foundation" system that directly drives foundation heat storage through solar photovoltaic power generation to achieve day and night temperature control of the building, cold wave emergency heating and foundation subsidence monitoring functions. It is a comprehensive solution for the safety and livability of single-story buildings. Background Art

[0002] In rural areas of my country, single-story buildings (such as residential buildings, livestock houses, etc.) have become the main building form due to their economy and practicality. However, due to the large temperature difference between indoors and outdoors, especially in winter, the temperature difference between day and night and extreme cold waves have seriously affected the living comfort of residents and even threatened the health of livestock. At the same time, foundation subsidence problems occur frequently. Foundation subsidence caused by factors such as unstable soil, groundwater level fluctuations, uneven loads, design defects and natural disasters may cause damage to the building structure and endanger life and property. Therefore, how to use safe, economical and environmentally friendly methods to stabilize indoor temperature, ensure emergency heating in extremely cold weather and detect foundation subsidence risks as early as possible has become a difficult problem that needs to be solved urgently for rural single-story buildings.

[0003] Current temperature control methods mostly rely on battery energy storage or fuel heating. Table 1 shows the advantages and disadvantages of the main methods, all of which have many limitations. Battery energy storage systems are costly and pollute the environment, making them unsuitable for widespread use in rural areas; traditional fuel heating methods have high carbon emissions and are not environmentally friendly. Although solar collectors can utilize solar energy to a certain extent, the equipment is complex, the cost is high, and it is difficult to provide continuous heating at night. It should be noted that solar energy combined with conventional phase change thermal storage systems has high requirements on material performance and control accuracy. It is relatively complex from design to installation, and cannot meet the temperature maintenance needs of buildings without heat supply for a long time.

[0004] Table 1 Characteristics of main temperature control methods in rural buildings

[0005]

[0006]

[0007] In terms of foundation subsidence monitoring, commonly used methods include manual observation, level monitoring, GPS real-time monitoring, and inclinometer monitoring. Manual observation and traditional instruments have data delays and cannot provide real-time feedback on subsidence. In addition, the coverage of monitoring points is limited, making it difficult to fully reflect foundation changes. High-precision equipment (such as GPS systems) is expensive, which limits its widespread application in rural areas.

[0008] In view of the above technical limitations, the present invention proposes a building temperature control, emergency heating and subsidence monitoring method based on wax pool foundation, and its main innovations are as follows:

[0009] (1) Day and night temperature difference control

[0010] Through rooftop photovoltaic power generation, the wax pool in the foundation is heated during the day, and the paraffin is converted from solid to liquid to store heat; at night, the paraffin cools to a solid state and releases heat, ensuring stable room temperature and avoiding the use of expensive and highly polluting conventional battery energy storage methods.

[0011] (2) Emergency heating during cold waves

[0012] When encountering continuous cold wave weather, the ground-based paraffin heat storage pool is converted into a fuel supply pool, providing emergency heating to the room through the paraffin combustion stove, and has the ability to maintain indoor temperature when solar energy is missing for more than dozens of days.

[0013] (3) Foundation subsidence monitoring

[0014] By real-time monitoring of the liquid level changes at characteristic positions of the foundation wax pool, a historical database is established to achieve dynamic monitoring of subsidence and inclination, warn of potential foundation subsidence hazards, and ensure building safety.

[0015] In summary, the present invention is based on low-cost wax pool foundation and solar energy renewable energy, and provides a comprehensive solution for day and night temperature control, emergency heating and subsidence monitoring for single-story buildings. It has the advantages of easy installation, environmental protection, economy, strong adaptability, etc., and is suitable for widespread application in rural areas. Summary of the invention

[0016] The purpose of the present invention is to provide a "solar energy-wax pool foundation" system, which directly drives the foundation paraffin heat storage through solar photovoltaic power generation, thereby realizing the comprehensive functions of day and night temperature control, cold wave emergency heating and foundation subsidence monitoring of rural single-story buildings.

[0017] The objective of the present invention is achieved through the following technical solutions:

[0018] The rural single-story building "solar energy-wax pool foundation" system of the present invention comprises a solar photovoltaic power generation module, a connecting cable and a monitoring module, a wax pool foundation module, an emergency heating module and a foundation subsidence monitoring module.

[0019] The solar photovoltaic power generation module includes photovoltaic panels, brackets, and cable connectors. One of the core technologies is a method for calculating the optimal area of ​​photovoltaic panels under the multi-field coupling conditions of the "solar energy-wax pool foundation" system, which is used to efficiently collect solar energy and convert it into electrical energy.

[0020] The connecting cable and monitoring module include cables, switches, overload protectors, and monitoring panels, which are used for current transmission, monitoring, and power regulation.

[0021] The wax pool foundation module includes a wax pool, support columns, paraffin, white oil, heating cables, cover plates, and cable holes. One of the core technologies is a method for calculating the optimal ratio and amount of paraffin and white oil under multi-field coupling conditions of the "solar energy-wax pool foundation" system, which is used to convert electrical energy into thermal energy and achieve day and night thermal balance adaptation and regulation management through paraffin phase change.

[0022] The emergency heating module includes a temperature sensor, a metal lead tube, a combustion furnace, a smoke exhauster, and a filling hole. One of the core technologies is a method for predicting paraffin consumption when solar energy is non-periodically absent, which is used for emergency heating and material backfilling in cold weather.

[0023] The foundation subsidence monitoring module includes a static pressure sensor, an optical fiber, and a single-chip microcomputer. One of the core technologies is to convert the static pressure data measured in real time at the characteristic position of the wax pool into the geometric principle and calculation method of the foundation inclination angle for dynamic monitoring of foundation subsidence.

[0024] The above-mentioned "solar energy-wax pool foundation" system provides a comprehensive solution for day and night temperature control, emergency heating and subsidence monitoring of rural single-story buildings, mainly including the following three functions:

[0025] (1) Under normal sunshine conditions, the winter day and night temperature difference control of "solar photovoltaic power generation-ground-based paraffin thermal storage" was achieved

[0026] The paraffin heat storage tank in the foundation is directly heated by using rooftop solar photovoltaic power generation, and heat is stored and released through the solid-liquid phase change between paraffin and paraffin oil. During the day, paraffin absorbs solar energy and transforms from solid to liquid paraffin oil, storing heat to prevent the indoor temperature from being too high; at night, when the sun disappears, the paraffin oil gradually cools to solid paraffin, releasing heat to keep the indoor temperature relatively stable. The present invention effectively avoids the use of expensive and highly polluting energy storage batteries, and does not rely on the imperfect power grid system in rural areas.

[0027] (2) When there is a continuous cold wave, emergency heating is achieved using the paraffin in the wax pool foundation as fuel reserve

[0028] When encountering extremely cold weather such as continuous haze, heavy rain and snow, solar power generation cannot work, and the heat stored in the paraffin foundation is quickly consumed. The present invention temporarily converts the paraffin foundation heat storage pool into a fuel supply pool, and uses the paraffin combustion furnace installed on the foundation to provide emergency heating for the room, ensuring that the indoor temperature remains at a suitable stable state. Since the volume of paraffin stored in the wax pool is large enough, the emergency fuel supply can be guaranteed throughout the winter, and it only needs to be replenished with the paraffin consumed in the previous winter before winter each year for recycling.

[0029] (3) Real-time monitoring of foundation subsidence and tilt dynamic data throughout the entire life cycle, timely ensuring building safety and life and property

[0030] Construct a paraffin oil level position database for the foundation, and use static pressure sensors to automatically monitor the paraffin oil level in different characteristic directions. Based on the principle of liquid level adaptive leveling, the risk of foundation subsidence is identified by analyzing the real-time data changes of the paraffin level, and the inclination angle when the foundation sinks is quantitatively calculated through geometric relationships. If it is greater than the safe inclination angle, an early warning will be issued to the user, so that the user can discover the hidden dangers of foundation subsidence as early as possible, propose preventive measures, and ensure the safety of buildings and people.

[0031] It can be seen from the technical solution provided by the present invention that the "solar energy-wax pool foundation" system provided by the present invention can better realize the day and night temperature control and emergency heating functions of rural single-story buildings, while providing dynamic subsidence monitoring data support for the entire life cycle to ensure the safety of buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 An overview of the solar-wax pool foundation building in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the wax pool foundation structure in an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of paraffin phase change day and night temperature control in an embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of foundation subsidence data analysis in an embodiment of the present invention.

[0037] In the figure: 1—solar photovoltaic power generation panel; 2—wax pool foundation; 3—wax pool bottom plate; 4—heating cable; 5—paraffin oil; 6—floor; 7—paraffin melting and heat storage; 8—paraffin solidification and heat release. DETAILED DESCRIPTION

[0038] In order to better understand the present invention, the following is a clear and complete description of the examples of the present invention, and a specific implementation scheme is provided in conjunction with the above-mentioned figures. The contents not described in detail in the examples of the present invention belong to the prior art known to professional and technical personnel in the field.

[0039] Example 1: Installation and use of solar-wax pool foundation thermal storage system

[0040] 1. Installation method of solar photovoltaic power generation module

[0041] (1) Install solar photovoltaic panels on the roof of a building, use brackets to ensure the stability of the photovoltaic panels, and keep the photovoltaic panels at the optimal tilt angle to maximize the collection of solar energy.

[0042] (2) The photovoltaic panels are connected to the wax pool foundation modules via cables to provide the required electrical energy.

[0043] (3) Calculation method of the optimal area of ​​photovoltaic panels under multi-field coupling conditions of the "solar energy-wax pool foundation" system

[0044] The total heat transfer coefficient of the wall and roof is:

[0045]

[0046] Where U is the total heat transfer coefficient of the wall and roof, W / (m 2 ·℃); α in , α out are the indoor and outdoor convective heat transfer coefficients, W / (m 2 ·℃);λ w , i are the thermal conductivity of the wall, roof and insulation layer, W / (m·℃); δ w , δ i are the average thickness of wall, roof and insulation material, m respectively.

[0047] The total heat dissipation area of ​​the house surface is:

[0048] A a =A E +A S +A W +A N +A t (2)

[0049] In the formula, A a is the total surface area of ​​the house, m 2 ; A E , A S , A W , A N , A t The east, south, west, north walls and roof areas, m 2 .

[0050] The heat dissipation of a house during a diurnal cycle is:

[0051]

[0052] In the formula, Q d is the heat dissipation of the house during the day, J; is the average temperature that needs to be maintained indoors, ℃; is the average outdoor temperature during the day, ℃; t d is the time of one diurnal cycle corresponding to the average outdoor temperature during the day, s.

[0053] Similarly, the heat dissipation of a house at night in a diurnal cycle is:

[0054]

[0055] In the formula, is the average outdoor temperature at night, ℃; t n is the time of the average outdoor temperature at night corresponding to a diurnal cycle, s.

[0056] In order to maintain a relatively stable indoor temperature in the room during the day and at night, the total heat dissipation of the house under normal circumstances needs to be supplemented by the heat stored in the paraffin wax in the foundation. The heat stored in the paraffin wax comes from the electricity generated by the solar photovoltaic panels. Therefore, the total solar energy required to be received by a day and night wax pool can be determined as:

[0057]

[0058] In the formula, Q s The solar energy required for a wax pool in a house to maintain temperature during the day and night, J; η w is the efficiency of paraffin heat transfer to the room, dimensionless.

[0059] According to the principle of energy conservation, the minimum area of ​​solar photovoltaic panels required is:

[0060]

[0061] In the formula, A s is the area of ​​the solar panel, m 2 ;P s is the power generated by photovoltaic panels in the target area, W / m 2 ;t s is the effective power generation time of the photovoltaic panel in a day and night cycle, s; η s is the efficiency of transferring energy from solar energy to paraffin, dimensionless.

[0062] 2. Installation method of wax pool foundation module

[0063] (1) A wax pool is set up under the building foundation. The wax pool is made of corrosion-resistant materials and filled with a certain proportion of solid paraffin and liquid white oil. Support columns are installed in the pool to ensure the structural stability of the wax pool.

[0064] (2) A heating cable is installed at the bottom of the wax pool to heat the paraffin wax through the Joule heat generated by the electric current. When there is sufficient sunshine during the day, the electricity collected by the photovoltaic panel is transmitted to the wax pool, and the heating cable converts the electricity into heat energy, causing the paraffin oil to change from solid to liquid, storing heat.

[0065] (3) At night, the paraffin gradually cools to a solid state, releasing the stored heat, thereby regulating and maintaining a suitable indoor temperature.

[0066] (4) Calculation method for the optimal ratio and dosage of paraffin and white oil under multi-field coupling conditions of the "solar energy-wax pool foundation" system

[0067] Since the latent heat of paraffin phase change is about 100 times its specific heat, the effect of paraffin temperature change on heat storage is ignored here, so the heat dissipation of the house at night should be equal to the heat storage of paraffin during the day. From this heat balance relationship, the mass of paraffin required can be obtained as:

[0068]

[0069] In the formula, m w is the mass of paraffin, kg; ΔH w is the latent heat of phase change of paraffin, J / kg.

[0070] By density conversion, the volume of paraffin wax can be obtained as:

[0071]

[0072] Where V w is the volume of paraffin, m 3 ρ w is the density of paraffin, kg / m 3 .

[0073] Since the melting point of pure paraffin is generally high, when it reaches the melting point and undergoes phase change and heat storage, it may cause the indoor temperature to be too high, affecting the living comfort. Therefore, in the present invention, by adding white oil (blank oil with relatively simple components obtained by crude oil refining, also known as "mineral oil") with good mutual solubility to paraffin, a relatively softened paraffin oil is formed, and by adjusting the ratio of paraffin and white oil, the melting point of the paraffin oil is controlled to be slightly higher than the indoor habitable temperature. The target melting point of the paraffin oil can be determined according to the indoor temperature and the heat transfer characteristics of the floor:

[0074]

[0075] Where, T m is the target melting point of paraffin oil, ℃; α p , α f are the convective heat transfer coefficients between the wax pool and the lower surface of the floor, and between the indoor airflow and the upper surface of the floor, W / (m 2 ·℃);δ f is the floor thickness, m; λ f is the thermal conductivity of the floor, W / (m·℃); A f is the area of ​​the floor, m 2 .

[0076] Assume that the mass ratio of white oil to paraffin is 0 x, then the change of the melting point of paraffin oil can be approximately expressed by the following empirical formula:

[0077] T m =T w -kO x (10)

[0078] Where, T w is the melting point of pure paraffin, °C; k is a constant related to the properties of paraffin and white oil, determined by experience or experiment; O x is the mass ratio of oil to paraffin, dimensionless.

[0079] Combining equations (7), (9) and (10), we can get the required white oil quality:

[0080]

[0081] Substituting the density of white oil for conversion, the required volume of white oil is:

[0082]

[0083] Where V o is the volume of white oil, m 3 ρ o is the density of white oil, kg / m 3 .

[0084] 3. How to set up the emergency heating module

[0085] (1) When there is a continuous cold wave and the solar photovoltaic panel is insufficient to generate electricity, the wax pool is connected to the combustion furnace through a metal lead pipe for emergency heating. The fuel of the combustion furnace is paraffin oil in the foundation. After it is burned, the exhaust gas is discharged to the outside through the smoke exhauster to ensure the safety of indoor air.

[0086] (2) The heat provided by the combustion of paraffin oil can maintain room temperature for a long time, avoiding the overcooling of the building environment due to low temperature weather.

[0087] (3) Calculation method for optimal consumption of paraffin oil when solar energy is not available for a period of time

[0088] When encountering continuous cold wave weather and solar energy is missing all day, the heat dissipation of the room in a day and night is:

[0089] Q c =Q d +Q n (13)

[0090] Then, according to the principle of heat balance, the mass and volume of paraffin oil required for the combustion furnace to burn for one day and night are as follows:

[0091]

[0092] In the formula, m m is the mass of paraffin oil required for burning for one day and night, kg; H is the combustion heat of paraffin oil, J / kg; V m The volume of paraffin oil required for burning in one day and night, J / kg; ρ m is the density of paraffin oil, kg / m 3 .

[0093] 4. Installation and monitoring method of foundation subsidence monitoring module

[0094] (1) Static pressure sensors are set at four right angles to the bottom of the wax pool. The static pressure sensors are connected to the single-chip microcomputer through optical fibers to record the changes in the static pressure at the bottom of the wax pool and the paraffin oil level in real time.

[0095] (2) When the foundation sinks, the paraffin level will change, and the monitoring system can detect and record this data in real time. By establishing a database of dynamic changes in the liquid level, the liquid level change data can be analyzed horizontally and vertically to determine whether the foundation is at risk of sinking, and to issue early warning information based on the severity.

[0096] (3) Geometric principle and calculation method for converting wax pool static pressure data into foundation inclination angle

[0097] The average inclination angles of the foundation along the east-west and north-south axes are:

[0098]

[0099] In the formula, θ EW ,θ SN is the average inclination angle of the foundation along the east-west and north-south axes, dimensionless; g is the gravitational acceleration, m / s 2 ; L EW , L SN are the lengths of the east-west and north-south central axes, m; P EN , P ES , P WS , P WN They are the static pressure of paraffin oil obtained by real-time monitoring at the northeast, southeast, southwest and northwest corners of the wax pool bottom, Pa.

[0100] The overall inclination angle of the foundation can be expressed as follows:

[0101]

[0102] Where θ is the overall inclination angle of the foundation, which is dimensionless.

[0103] Example 2: Operation and maintenance of solar-wax pool system

[0104] 1. Day and night temperature difference control method

[0105] (1) Under normal sunlight conditions, the electricity collected by the photovoltaic panels is transmitted to the wax pool through cables, driving the heating cables to heat the paraffin. During the day, the paraffin absorbs heat and changes from solid to liquid, storing heat energy. At night, the paraffin gradually cools down, releasing the stored heat to maintain a stable temperature in the building.

[0106] (2) By setting up an intelligent temperature control system, the heating cable can be ensured to work at an appropriate temperature to avoid overheating and energy waste. For example, according to the specific needs of the room temperature, the solar heating system for the wax pool can be completely turned off in summer, and the photovoltaic panel connection switch can be partially turned off in spring and autumn to achieve flexible adjustment of the room temperature.

[0107] 2. Emergency heating method

[0108] (1) In cold waves or extreme weather, when photovoltaic power generation is insufficient, the wax pool can be used as a fuel supply pool to provide additional heat by burning paraffin. When the indoor temperature sensor detects that the room temperature is lower than the set critical value, the combustion furnace ignites through the automatic igniter, and the temperature control system controls the number of candle wicks lit in the combustion furnace, thereby keeping the room temperature within a suitable range.

[0109] (2) According to estimates, the paraffin oil contained in the wax pool is sufficient to meet the emergency heating needs throughout the winter, so there is no need to replenish the paraffin oil consumed by emergency heating during the winter. The real-time consumption volume of paraffin oil can be predicted by the data monitored by the static pressure sensor of the wax pool, and the method is as follows:

[0110]

[0111] Where V E (t) is the volume of paraffin oil consumed by emergency heating in the wax pool at time t, m 3 ; t is the time corresponding to the monitoring data of the static pressure sensor, s.

[0112] (3) Before winter each year, the wax pool should be checked and the consumed paraffin oil should be replenished through the filling hole to ensure the continuity and stability of the system. The volume of paraffin oil to be replenished is also calculated according to formula (19), but it is necessary to ensure that the static pressure monitoring data is measured under the condition that the paraffin oil is in liquid state.

[0113] 3. Foundation subsidence monitoring and data analysis methods

[0114] (1) Monitor the change of liquid level through the static pressure sensor, automatically record the paraffin oil level data, and store it in the database.

[0115] (2) Regularly analyze the monitoring data and judge the tilt trend of the foundation in combination with historical data. When the tilt angle is greater than the critical safety tilt angle allowed by the foundation, the safety alarm mechanism is triggered, and a foundation tilt alarm signal is promptly sent to the user, reminding the user to formulate corresponding preventive measures to avoid damage to the building and personal safety caused by foundation subsidence.

[0116] θ>θ c (20)

[0117] In the formula, θ c is the critical safe inclination angle allowed for the foundation, dimensionless.

[0118] Example 3: Parameter Example

[0119] Taking a rural single-story building in a northern region of my country as an example, an example of the main parameters of the present invention is given. The single-story building in the example is 15m long, 10m wide and 5m high. The conventional daytime outdoor temperature in the region in winter is -5 to 5°C, and 0°C is taken as the average daytime outdoor temperature in the example; the nighttime outdoor temperature is -15 to -5°C, and -10°C is taken as the average nighttime outdoor temperature in the example; when encountering cold waves, there is no sunshine for heating, and the outdoor temperature drops to -25 to -15°C, and -20°C is taken as the average day and night outdoor temperature during the cold wave. The present invention maintains the indoor temperature in the example at around 25°C by regulating the indoor temperature difference between day and night. The outer surface of the building wall and roof adopts a polyurethane composite insulation layer, and its thickness is usually between 0.01 and 0.1m, and 0.05m is taken as the thickness of the insulation layer in the example. The power of solar photovoltaic panels under sunshine conditions in the region is 100 to 150W / m 2 , in this example, 120W / m 2 The average power of solar panels. The paraffin wax is No. 60 fully refined paraffin wax, and the white oil is No. 32 refined white oil.

[0120] (1) In the example, α in , α out Take 10W / (m 2 ℃) and 20W / (m 2 ℃), δ w , δ i Take 0.2m and 0.05m respectively, λ w , i Taking 0.4W / (m·℃) and 0.02W / (m·℃) respectively, according to formula (1), U is calculated to be 0.3W / (m 2 ·℃), and A is calculated according to formula (2): a 550m 2 .

[0121] (2) In the example, t d Take 12h and calculate Q according to formula (3) d1.8×10 8 J, t n Take 12h and calculate Q according to formula (4): n 2.5×10 8 J.

[0122] (3) In the example, η w Take 0.8 and calculate Q according to formula (5): s 5.4×10 8 J.

[0123] (4) In this example, P s Take 120W / m 2 , t s Take 6h, n s Take 0.75 and calculate A according to formula (6): s 276.75m 2 .

[0124] (5) In the example, ΔH w Take 100 kJ / kg and calculate m according to formula (7): w is 3.1t. w Take 0.9×10 3 kg / m 3 , and V is calculated according to formula (8) w 3.5 m 3 .

[0125] (6) In the example, α p , α f Take 12W / (m 2 ℃) and 18W / (m 2 ℃), δ f Take 0.2m, λ f Take 2W / (m·℃) and calculate T according to formula (9): m is 35℃.

[0126] (7) In this example, the melting point of No. 60 fully refined paraffin is 55℃~65℃. In this example, 60℃ is the average melting point of pure paraffin. White oil needs to be added to raise the target melting point of paraffin oil to T m Adjust to 35℃. k is 50, and O is calculated according to formula (10) x is 0.5, and m is calculated according to formula (11): o 1.6t.ρ o Take 0.9×10 3 kg / m 3 , calculated according to formula (12) to get V o 1.8m 3 .

[0127] (8) In this example, Q is calculated according to formula (13): c 6.4×10 8 J.H. m Take 43000 kJ / kg and calculate m according to formula (14): m is 15kg, and V is calculated according to formula (15): m 0.017m 3 .

[0128] (9) In this example, considering that the total number of cold wave days in the whole winter is 45 days, the volume of paraffin oil required for emergency heating is 0.8m 3 , the total volume of paraffin oil that should be stored in the wax pool before winter is 3.5+1.8+0.8=6.1m 3 .

[0129] (10) In this example, g is taken as 9.8 m / s 2 , P EN , P ES , P WS , P WN Take 265Pa, 175Pa, 440Pa, and 530Pa respectively, and calculate θ according to formula (16) EW is 0.002, and according to formula (17) we can calculate θ SN is 0.0018, and according to formula (18), θ is 0.0027. c Taking 0.087, it can be seen from formula (20) that the inclination of the house foundation in this example is still within the safe range.

[0130] (11) In this example, P EN (0), P ES (0), P WS (0), P WN (0) are 352Pa, 348Pa, 355Pa, 350Pa, respectively. EN (t), P ES (t), P WS (t), P WN (t) takes 299Pa, 280Pa, 295Pa, 282Pa respectively, and calculates V according to formula (19): E (t) is 1.1m 3 .

[0131] The above embodiments are only exemplary descriptions of the present invention, and relevant technical personnel can adjust and improve the implementation methods according to the content of the present invention without departing from the main purpose and scope of the present invention. The "solar energy-wax pool foundation" system of the present invention realizes the temperature control, emergency heating and subsidence monitoring functions of rural single-story buildings by rationally utilizing solar energy, providing a safe, environmentally friendly and efficient comprehensive solution for rural areas.

Claims

1. A method for temperature control, emergency heating and subsidence monitoring of a building based on a wax pool foundation, comprising a solar photovoltaic power generation module, a wax pool foundation module, an emergency heating module and a foundation subsidence monitoring module, characterized in that: The solar photovoltaic power generation module is used to convert solar energy into electrical energy and drive the paraffin in the foundation to store heat through the heating cable; The wax pool foundation module includes a paraffin pool, which heats the paraffin by solar energy during the day and releases heat by cooling the paraffin at night to maintain a stable building temperature; The emergency heating module uses the paraffin pool as a fuel supply pool during continuous cold wave weather, and provides emergency heating for the building by burning paraffin; The foundation subsidence monitoring module dynamically monitors the inclination of the foundation by monitoring the changes in the liquid level of the paraffin pool and provides an early warning.

2. The building temperature control method of solar-wax pool foundation according to claim 1, characterized in that: Solar energy is collected by solar photovoltaic panels installed on the roof, and the electricity is used to heat the paraffin pool in the foundation, turning the paraffin from solid to liquid and storing heat. At night, the paraffin cools to a solid state and releases heat, maintaining the stability of the room temperature.

3. The emergency heating method according to claim 1, characterized in that: When solar power generation is insufficient, the paraffin in the wax pool is burned through the furnace to provide heat to cope with extremely cold weather and ensure that the indoor temperature is maintained within a suitable range.

4. The method for monitoring foundation subsidence according to claim 1, characterized in that: A static pressure sensor is installed in the paraffin pool to monitor the change of liquid level. The foundation inclination is determined through data analysis. When the liquid level change exceeds the preset range, a foundation subsidence warning is issued.

5. The method according to any one of claims 1 to 4, characterized in that: The wax pool foundation module also includes white oil, which is used to reduce the melting point of paraffin wax so that it can adapt to the regulation needs of the day and night temperature difference of the building.

6. The method according to any one of claims 1 to 4, characterized in that: The system connects the single-chip microcomputer via a static pressure sensor and optical fiber communication to achieve real-time monitoring of liquid level changes, and stores the data in a database for long-term trend analysis and early warning.

7. The method according to any one of claims 1 to 4, characterized in that: The installation position and inclination angle of the solar photovoltaic power generation module are optimized according to local sunshine conditions to maximize the efficiency of solar energy utilization.

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