A method and system for heating a farm

Abstract

The present application relates to the field of farm heating, and particularly relates to a farm heating method and system, wherein the method is applied to a farm heating system, the system comprises a renewable energy heating module, a gas supply module and a control module, and the method comprises: monitoring real-time temperature of the farm through the control module; controlling heat proportion of the renewable energy heating module and the gas supply module for heating the farm according to a preset target function and the real-time temperature in the farm; and the target function is used for controlling the farm heating system to adjust actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at the minimum operation cost. The present application realizes environmental protection and low-cost heating by consuming manure of livestock and poultry through the renewable energy heating module.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of farm heating, in particular to a farm heating method and system. BACKGROUND

[0002] When a farm is built in the north for livestock and poultry breeding, due to the cold winter in the north, the heat produced by livestock and poultry is not enough to maintain a suitable temperature, which can easily lead to livestock and poultry freezing, growth stagnation, weight loss, illness and other problems that are not conducive to livestock and poultry breeding. Therefore, it is necessary to heat the farm in the cold winter.

[0003] However, in the era of carbon peak and carbon neutral, most pig farms still use natural gas for heating, which is high in cost and not environmentally friendly. In addition, livestock and poultry breeding generally produces a large amount of manure, which can cause environmental pollution if directly discharged. SUMMARY

[0004] In order to reduce the heating cost of the farm and reduce the environmental pollution generated by the farm, the embodiment of the present application provides a farm heating method and system.

[0005] In a first aspect, the embodiment of the present application provides a farm heating method applied to a farm heating system, the system comprising a renewable energy heating module, a gas supply module and a control module, the renewable energy heating module comprising at least a biogas heating unit, a photo-thermal unit and a biomass particle heating unit; the biogas heating unit is used to convert the manure produced by livestock and poultry in the farm into biogas, and convert the biogas into heat to heat the farm; the photo-thermal unit is used to convert the collected solar energy into heat to heat the farm; the biomass particle heating unit is used to generate heat by burning biomass particles to heat the farm; the gas supply module is used to generate heat by burning natural gas to heat the farm;

[0006] The method comprises:

[0007] The real-time temperature of the farm is monitored by the control module;

[0008] According to a preset target function and the real-time temperature in the farm, the heat proportion of the renewable energy heating module and the gas supply module for heating the farm is controlled; the target function is used to control the farm heating system to adjust the actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at the minimum operating cost;

[0009] The target function is:

[0010]

[0011] is a preset weight, L g is the amount of natural gas consumed by the farm per day, F g is the cost of natural gas for the farm, L e is the amount of electricity consumed by the farm per day, F e is the cost of a unit of electricity, L w is the amount of water consumed by the farm per day, F w is the cost of a unit of water, M is the amount of biomass pellets consumed by the farm per day, F s is the cost of a unit of biomass pellets;

[0012] is a factor of the influence of temperature in the farm on the health of livestock and poultry, d is the number of time periods divided by a single day, T in (t) is the real-time temperature in the farm at time t, T set (t) is the most suitable temperature for livestock and poultry in the farm at time t.

[0013] In a second aspect, the embodiments of the present application also provide a heating system for a farm, comprising:

[0014] a renewable energy heating module, a gas supply module and a control module;

[0015] The renewable energy heating module at least includes a biogas heating unit, a photothermal unit and a biomass pellet heating unit;

[0016] The biogas heating unit is used to convert the manure produced by livestock and poultry in the farm into biogas, and convert the biogas into heat to heat the farm. The photothermal unit is used to convert collected solar energy into heat to heat the farm. The biomass pellet heating unit is used to generate heat by burning biomass pellets to heat the farm.

[0017] The gas supply module is used to generate heat by burning natural gas to heat the farm.

[0018] The control module is used to control the proportion of heat generated by the renewable energy heating module and the gas supply module to heat the farm according to a preset target function and the real-time temperature in the farm. The target function is used to control the farm heating system to adjust the actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at the minimum operating cost.

[0019] The target function is:

[0020]

[0021] is a preset weight, L gis the amount of natural gas consumed by the farm per day, the F g is the cost of natural gas for the farm, the L e is the amount of electricity consumed by the farm per day, the F e is the cost of a unit of electricity, the L w is the amount of water consumed by the farm per day, the F w is the cost of a unit of water, the M is the amount of biomass pellets consumed by the farm per day, the F s is the cost of a unit of biomass pellets;

[0022] the β is the influence factor of temperature in the farm on the health of livestock and poultry, the d is the number of time periods divided by a single day, the T in (t) is the real-time temperature in the farm at time t, the T set (t) is the most suitable temperature for livestock and poultry in the farm at time t.

[0023] The embodiment of the present application provides a farm heating method and system, which realizes heating of the farm through a renewable energy heating module and a gas supply module. The renewable energy heating module can stop supplying low-cost and environment-friendly heating, and the renewable energy heating module can convert manure of livestock and poultry into heat energy, so that environmental pollution is reduced. The gas supply module can be used for supplementary heating when the renewable energy heating module is insufficient. According to a preset target function and a real-time temperature in the farm, the renewable energy heating module and the gas supply module can be controlled to heat the farm in a heat proportion, so that the farm heating system is controlled to adjust an actual temperature in the farm to a most suitable temperature for livestock and poultry in the farm at a minimum operation cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0025] Figure 1 is a flow chart of a farm heating method provided by an embodiment of the present application;

[0026] Figure 2 is an architecture diagram of a farm heating system provided by an embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a farm system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present application.

[0029] Please refer to Figure 1 The embodiments of the present application provide a method for heating a farm. The method is applied to a farm heating system, and the farm heating system comprises a renewable energy heating module, a gas supply module and a control module, wherein the renewable energy heating module at least comprises a biogas heating unit, a photo-thermal unit and a biomass particle heating unit.

[0030] The biogas heating unit is used for converting manure produced by livestock and poultry in the farm into biogas, and converting the biogas into heat to heat the farm. The photo-thermal unit is used for converting collected solar energy into heat to heat the farm. The biomass particle heating unit is used for generating heat by burning biomass particles to heat the farm. The gas supply module is used for generating heat by burning natural gas to heat the farm.

[0031] The biogas heating unit realizes heating by burning biogas in an incinerator. The photo-thermal unit realizes heating by converting solar energy into heat energy of water and exchanging heat with the indoor environment of the farm. The biomass particle heating unit realizes heating by burning biomass particles in an incinerator. The gas supply module realizes heating by burning natural gas in an incinerator to generate heat for the farm.

[0032] Please refer to the flowchart shown in Figure 1 The method comprises the following steps:

[0033] In step 100, the real-time temperature of the farm is monitored by the control module.

[0034] In step 200, according to a preset target function and the real-time temperature in the farm, the heat proportion of the renewable energy heating module and the gas supply module for heating the farm is controlled. The target function is used for controlling the farm heating system to adjust the actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at the minimum operation cost.

[0035] In the embodiments of the present application, the target function is as follows:

[0036]

[0037] Wherein, α is a preset weight, L gF is the amount of natural gas consumed by the farm per day, L is the cost of natural gas per unit, F is the amount of electricity consumed by the farm per day, L is the cost of electricity per unit, F is the amount of water consumed by the farm per day, M is the cost of water per unit, F is the amount of biomass pellets consumed by the farm per day, and L is the cost of biomass pellets per unit. g F is the amount of natural gas consumed by the farm per day, L is the cost of natural gas per unit, F is the amount of electricity consumed by the farm per day, L is the cost of electricity per unit, F is the amount of water consumed by the farm per day, M is the cost of water per unit, F is the amount of biomass pellets consumed by the farm per day, and L is the cost of biomass pellets per unit. e F is the amount of natural gas consumed by the farm per day, L is the cost of natural gas per unit, F is the amount of electricity consumed by the farm per day, L is the cost of electricity per unit, F is the amount of water consumed by the farm per day, M is the cost of water per unit, F is the amount of biomass pellets consumed by the farm per day, and L is the cost of biomass pellets per unit. e F is the amount of natural gas consumed by the farm per day, L is the cost of natural gas per unit, F is the amount of electricity consumed by the farm per day, L is the cost of electricity per unit, F is the amount of water consumed by the farm per day, M is the cost of water per unit, F is the amount of biomass pellets consumed by the farm per day, and L is the cost of biomass pellets per unit. w F is the amount of natural gas consumed by the farm per day, L is the cost of natural gas per unit, F is the amount of electricity consumed by the farm per day, L is the cost of electricity per unit, F is the amount of water consumed by the farm per day, M is the cost of water per unit, F is the amount of biomass pellets consumed by the farm per day, and L is the cost of biomass pellets per unit. w F is the amount of natural gas consumed by the farm per day, L is the cost of natural gas per unit, F is the amount of electricity consumed by the farm per day, L is the cost of electricity per unit, F is the amount of water consumed by the farm per day, M is the cost of water per unit, F is the amount of biomass pellets consumed by the farm per day, and L is the cost of biomass pellets per unit. s F is the amount of natural gas consumed by the farm per day, L is the cost of natural gas per unit, F is the amount of electricity consumed by the farm per day, L is the cost of electricity per unit, F is the amount of water consumed by the farm per day, M is the cost of water per unit, F is the amount of biomass pellets consumed by the farm per day, and L is the cost of biomass pellets per unit.

[0038] β is the influence factor of temperature on the health of livestock and poultry in the farm, d is the number of time periods into which a day is divided (for example, d can take the values 12, 24, etc., indicating that a day is divided into 12 or 24 time periods), T in (t) is the real-time temperature in the farm at time t, T set (t) is the most suitable temperature for livestock and poultry in the farm at time t.

[0039] The objective function (L g *F g +L e *F e +L w *F w +M*F s ) is the actual operating cost of the farm per day. Since there are many places in the farm that require water, electricity, and natural gas, it is complex and prone to error to separate the water, electricity, and natural gas consumed by the heating system. Considering that the variables in the actual operating cost of the farm per day are actually caused by the change of the heating system, the objective function directly reflects the cost change caused by the heating mode of the heating system through the actual operating cost of the farm per day.

[0040] As for the preset weight α, it is to reduce the influence of the order of magnitude of (L g *F g +L e *F e +L w *F w +M*F s ) on the entire objective function, and balance the influence of (L g *F g +L e *F e +L w *F w +M*F s ) and on the entire objective function.

[0041] In the embodiment, the renewable energy heating module and the gas supply module are used to heat the farm. The renewable energy heating module can stop supplying low-cost and environmentally friendly heating, and the renewable energy heating module can convert the manure of livestock and poultry into heat energy to reduce environmental pollution. The gas supply module can be used to supplement heating when the renewable energy heating module is insufficient. The application can control the heat ratio of the renewable energy heating module and the gas supply module to heat the farm according to the preset target function and the real-time temperature in the farm, so as to control the farm heating system to adjust the actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at the minimum operating cost. In this way, the heating can be automatically adjusted when the temperature is extremely low at night to ensure sufficient heating.

[0042] The following describes Figure 1 The execution mode of each step is shown.

[0043] For step 100:

[0044] In an embodiment of the application, the control module includes a temperature monitoring unit. The temperature monitoring unit is used to monitor the real-time temperature in the farm, and notify the control module when the real-time temperature in the farm is not in the suitable temperature range for livestock and poultry in the farm. The suitable temperature range is a temperature range that is conducive to the growth and health of livestock and poultry. Different livestock and poultry correspond to different suitable temperature ranges, which are not limited by the application.

[0045] For step 200:

[0046] In an embodiment of the application, the renewable heating module further includes a geothermal heat pump heating unit and a heat storage water tank:

[0047] The geothermal heat pump heating unit is used to obtain the heat of underground hot water to heat the farm;

[0048] The heat storage water tank is used to store the hot water generated by the light heat unit and the geothermal heat pump heating unit.

[0049] In this embodiment, if it is found that there is hot water under the farm, and the depth of the hot water is less than the depth threshold, that is, the excavation cost of the hot water is lower than the construction budget of the geothermal heat pump heating unit, the geothermal heat pump heating unit can be established by installing a geothermal water pump to heat the farm using underground hot water.

[0050] Based on the embodiment, the step 200 of controlling the heat ratio of the renewable energy heating module and the gas supply module to heat the farm according to the preset target function and the real-time temperature in the farm includes:

[0051] When it is monitored that the real-time temperature in the farm is not in the suitable temperature interval of livestock and poultry in the farm, the proportion of heat of the renewable energy heating module and the gas supply module for heating the farm is controlled according to the preset target function and the real-time temperature in the farm.

[0052] Since the energy for the biogas heating unit, the light and heat unit and the ground heat pump heating unit in the renewable energy heating module to generate heat energy all belongs to renewable and environmentally friendly energy that does not need to be purchased additionally, the biogas heating unit, the light and heat unit and the ground heat pump heating unit only consume a little electric energy, water and natural gas (natural gas is generally used for ignition) for heating the farm, therefore, when the proportion of heat of the renewable energy heating module and the gas supply module for heating the farm is controlled, the biogas heating unit, the light and heat unit and the ground heat pump heating unit are preferentially used for heating the farm.

[0053] Further, according to the priority order of the biogas heating unit, the light and heat unit and the ground heat pump function unit, the biogas heating unit is preferentially used for heating the farm, when the biogas in the biogas heating unit is less than the biogas threshold value, the light and heat unit is started to heat, when the solar energy in the light and heat unit is less than the solar energy threshold value, the ground heat pump heating unit is increased to extract the underground hot water and increase the heat energy generated by the ground heat pump heating unit.

[0054] In the present application, the biogas heating unit is preferentially used, considering that biogas is difficult to store and has danger, and the light and heat unit is used for heating, in order to make full use of the current period of illumination.

[0055] In an embodiment of the present application, the proportion of heat of the renewable energy heating module and the gas supply module for heating the farm comprises:

[0056] In the case that the real-time temperature is lower than the minimum value of the suitable temperature interval, the heat energy Q required for the current farm to reach the suitable temperature interval is calculated n ;

[0057] The maximum heat energy Q generated by the biogas heating unit, the light and heat unit and the ground heat pump heating unit in the current period is respectively predicted max ;

[0058] The proportion of heat of the biogas heating unit, the light and heat unit, the ground heat pump heating unit, the biomass particle heating unit and the gas supply module for heating the farm is controlled according to the adjustment function;

[0059] The above adjustment function is:

[0060]

[0061] Q i, i = 1, 2, 3, Q1 is the heat energy provided by the biogas heating unit, Q2 is the heat energy provided by the photo-thermal unit, Q3 is the heat energy provided by the ground heat pump heating unit, Q i , i = 1, 2, 3, Q1 is the heat energy provided by the biogas heating unit, Q2 is the heat energy provided by the photo-thermal unit, Q3 is the heat energy provided by the ground heat pump heating unit, Q max , i = 1, 2, 3, Q1 is the heat energy provided by the biogas heating unit, Q2 is the heat energy provided by the photo-thermal unit, Q3 is the heat energy provided by the ground heat pump heating unit, Q j , j = 4, 5, Q4 is the heat energy provided by the biomass particle heating unit, and Q5 is the heat energy provided by the gas supply module.

[0062] The purpose of the above adjustment function is to control the heating system to raise the heating temperature to the suitable temperature range of livestock and poultry with the minimum single-day operating cost in the farm.

[0063] Among them, the heat provided by the biogas heating unit, the photo-thermal unit and the ground heat pump function unit is limited, but the heat provided by the biomass particle heating unit and the gas supply module is unlimited. The biomass particle heating unit can realize unlimited heating by purchasing biomass particles, and the gas supply module can realize unlimited heating by purchasing natural gas.

[0064] When the biogas heating unit, the photo-thermal unit and the ground heat pump unit have provided the maximum heat, but the temperature in the farm has not reached the suitable temperature range, the embodiment can continue to supplement heating through the biomass particle heating unit and the gas supply module. The embodiment can compare the price of biomass particles and the price of natural gas when providing the same heat, and preferentially heat through the biomass heating module or the gas supply module with lower cost.

[0065] In an embodiment of the present application, the above-mentioned maximum heat energy Q max , i = 1, 2, 3, Q1 is the heat energy provided by the biogas heating unit, Q2 is the heat energy provided by the photo-thermal unit, Q3 is the heat energy provided by the ground heat pump heating unit, Q

[0066] Obtain historical heating data corresponding to the heating system in the same historical period as the current period;

[0067] Establish a heating model corresponding to the heating system based on the historical heating data;

[0068] Predict Q max , i = 1, 2, 3, Q1 is the heat energy provided by the biogas heating unit, Q2 is the heat energy provided by the photo-thermal unit, Q3 is the heat energy provided by the ground heat pump heating unit, Q max , i = 1, 2, 3, Q1 is the heat energy provided by the biogas heating unit, Q2 is the heat energy provided by the photo-thermal unit, Q3 is the heat energy provided by the ground heat pump heating unit, Q max .

[0069] In an embodiment of the present application, the method further comprises:

[0070] In the case that the amount of biogas in the biogas heating unit is monitored to be higher than the biogas threshold value, the biogas heating unit is preferentially controlled to generate heat energy to heat the farm;

[0071] In the case that the amount of biogas in the biogas heating unit is monitored to be not higher than the biogas threshold value, but the current light intensity is higher than the light threshold value, the light-heat unit is controlled to generate heat energy to heat the farm, and the heat energy generated by the light-heat unit is transmitted to the biogas heating unit to accelerate biogas fermentation.

[0072] Generally at the initial stage of building the heating system, the feces in the biogas tank of the biogas heating unit has not completed biogas fermentation, and a part of the heat energy converted from solar energy can be transmitted to the biogas tank to accelerate the biogas fermentation of the feces. When the biogas in the biogas heating unit is sufficient, the biogas heating unit is preferentially used for heating.

[0073] In an embodiment of the present application, the method further comprises:

[0074] In the case that the real-time temperature is higher than the maximum value of the suitable temperature range, the remaining energy in the renewable energy heating module is converted into electric energy.

[0075] In the case that the real-time temperature is higher than the maximum value of the suitable temperature range, it indicates that the current heating exceeds the heating demand of the farm, and livestock and poultry are also prone to disease at a higher temperature, so the heating of the farm needs to be reduced in this case. The excess heat energy generated at present can be transmitted to the nearby residential area through hot water to provide heating for residents, and then the energy in the renewable energy heating module that has not been converted into heat energy is converted into electric energy, which is directly used to power the farm during the power peak of the farm, and the electric energy can be stored in the battery during the power valley of the farm, further reducing the cost of the farm. If the converted electric energy is too much, it can be further provided to the residential area.

[0076] In an embodiment of the present application, the method for building a farm heating system comprises:

[0077] The single-day operating cost C of the farm before building the farm heating system is obtained o :

[0078] C o = L og * F g + L oe * F e + L ow * F w ,

[0079] L og is the amount of natural gas consumed by the farm per day before building the system, and L oeL is the daily electricity consumption of the farm before the system is built. ow L is the daily water consumption of the farm before the system is built.

[0080] The construction area A1 corresponding to the biogas heating unit, the construction area A2 corresponding to the light-heat unit, and the number n of geothermal pumps corresponding to the geothermal heating unit are determined by building the objective function.

[0081] The objective function is built as follows:

[0082]

[0083] Q is the daily heat energy provided by the system. r Q is the daily heat energy provided by the system. n C1 is the cost of building a unit area of biogas pool, C2 is the cost of building a unit area of light-heat unit, C3 is the cost of a single geothermal pump, C p C is the cost of establishing a carbonization furnace for burning biogas and biomass particles. q C is the cost of establishing other costs of the system (such as the cost of pipes used for system construction, labor cost, etc.).

[0084] The objective function is to reduce the daily operating cost of the farm after heating with the minimum construction cost, and to ensure that the normal heating demand of the farm is met. In addition, before the system is built in this application, heating is carried out by burning natural gas.

[0085] Q is the heat energy required by the farm to reach the appropriate temperature range. n The heat energy required by the indoor temperature of the farm to reach the appropriate temperature range can be determined by prediction. As another embodiment, the heating demand of the farm in this application changes with the temperature, and the heating stage can be roughly divided into three stages: deep cold, cold and shallow cold, so the daily heating demand corresponding to the three stages can also be predicted according to the historical heating demand of the three stages.

[0086] In addition, in this embodiment, the heat energy Q provided by the system per day is: r

[0087] Q is the heat energy provided by the system per day. r = Q1*A1+Q2*A2+Q3*n+Q4*M+Q e ;

[0088] Q1 is the heat energy converted by the biogas produced by a unit area of biogas pool, Q2 is the heat energy converted by the solar energy collected by a unit area of solar panel, Q3 is the heat energy produced by a single geothermal pump, Q4 is the heat energy converted by a unit quantity of biomass particles, and Q e is the heat energy produced by the electric energy in the farm.​

[0089] Q1 can be calculated by the following way:

[0090] Q1 = L z q; L z = μ1*M x

[0091] L z q represents the heat energy supplied by the unit biogas tank per day, μ1 represents the biogas fermentation efficiency, M x represents the amount of livestock manure.

[0092] Q2 can be calculated by the following way:

[0093] Q2 = S1*σ1; S1 = σ2*S;

[0094] S1 represents the available solar radiation per unit area, σ1 represents the efficiency of converting solar energy into heat energy by the light-heat unit, σ2 represents the utilization efficiency of the solar panel per unit area to solar radiation, and S represents the solar radiation intensity per unit area.

[0095] Q4 can be calculated by the following way:

[0096] Q4 = M*τ; M represents the amount of unit biomass particles input, and τ represents the heat conversion efficiency of the biomass particles.

[0097] In an embodiment of the present application, the construction area corresponding to the biogas heating unit is less than or equal to the preset biogas tank area, and the preset biogas tank area is positively correlated with the breeding scale of the farm. The larger the breeding scale of the farm, the larger the area of the biogas tank that can be established. The scale of the farm includes the number of livestock and poultry raised and the floor area of the farm. For example, it can be preset that the biogas tank established can handle up to 80% of the manure of the livestock and poultry, and then the maximum area of the biogas tank that can handle 80% of the manure of the livestock and poultry can be determined according to the amount of manure that can be handled by the unit area of the biogas tank.

[0098] The construction area corresponding to the light-heat unit is less than or equal to the preset solar panel area, and the preset biogas tank area is less than the roof area of the farm. In order to better utilize solar energy, the solar panel of the light-heat unit in the present application is installed on the roof of the farm, and therefore, the larger the roof area of the farm, the larger the area of the light-heat unit that can be constructed.

[0099] The number n of geothermal pumps corresponding to the geothermal pump heating unit is less than or equal to the maximum demand number of geothermal pumps, and the maximum demand number of geothermal pumps is positively correlated with the amount of hot water existing underground in the farm.

[0100] In another embodiment of the present application, as Figure 3As shown, taking a pig farm as an example, the farm also has a power supply system and a water supply system connected with the above-mentioned heating system, the power supply system includes a renewable energy power generation module, an electricity storage unit, an alternating current power grid and a municipal power supply module, and the water supply system includes a water treatment unit and a geothermal water supply module.

[0101] The renewable energy power generation module in the power supply system is used to convert the excess energy in the heating system into electric energy, the electricity storage unit is used to store the electric energy into a battery, the alternating current power grid is used to transmit the power for production and life, the municipal power supply module is used to supply power to the pig farm and the surrounding area and to settle the cost, and the geothermal pump power supply unit in the renewable energy power generation module is directly connected with the battery to store the remaining geothermal energy in the form of electric energy in the battery after heating.

[0102] As shown in Figure 3 , specifically, the biogas heating unit includes a biogas fermentation tank, a wastewater treatment device, a waste residue treatment device and a gas storage device, the biomass particle heating unit includes a carbonization furnace and a flue gas recovery device, the heat storage unit is a heat storage water tank including a hot water area and a cold water area, and the hot water area includes a heat exchange pipeline.

[0103] The geothermal pump heating unit is connected with the pig farm, the resident end and the heat storage water tank, and can directly supply heat to the pig farm and the resident end through the action of a circulating pump, can directly provide domestic water to the resident end through the purification of a purifier, and can recycle the water exchanged with the pig farm to the geothermal well through the cold water area connected with the heat storage water tank, so as to ensure the recycling of water resources.

[0104] The PVT photovoltaic and photothermal unit (i.e. photothermal unit) is connected with the pig farm, the resident end, the battery and the biogas fermentation tank, can heat the pig farm, can heat the biogas tank to accelerate the generation efficiency of biogas, can heat the water exchanged with the resident end to supply the PVT photothermal unit for heating again, and can convert solar energy into electric energy to store in the battery to supply power to the pig farm.

[0105] The heating system shown in Figure 2 will be described below.

[0106] As shown in Figure 2 , the embodiment of the present application provides a farm heating system, which is characterized by comprising a renewable energy heating module 201, a gas supply module 202 and a control module 203.

[0107] The renewable energy heating module 201 at least comprises a biogas heating unit 2011, a photo-thermal unit 2012 and a biomass pellet heating unit 2013;

[0108] The biogas heating unit 20111 is used for converting the manure produced by livestock and poultry in the farm into biogas, and converting the biogas into heat to heat the farm; the photo-thermal unit 2012 is used for converting the collected solar energy into heat to heat the farm; and the biomass pellet heating unit 2013 is used for generating heat by burning biomass pellets to heat the farm;

[0109] The gas supply module 202 is used for generating heat by burning natural gas to heat the farm;

[0110] The control module 203 is used for controlling the heat proportion of the renewable energy heating module and the gas supply module for heating the farm according to a preset target function and a real-time temperature in the farm; the target function is used for controlling the farm heating system to adjust the actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at a minimum operating cost;

[0111] The target function is as follows:

[0112]

[0113] The α is a preset weight, the L g is the amount of natural gas consumed by the farm per day, the F g is the cost of natural gas for the farm, the L e is the amount of electricity consumed by the farm per day, the F e is the cost of unit electricity, the L w is the amount of water consumed by the farm per day, the F w is the cost of unit water, and the M is the amount of biomass pellets consumed by the farm per day, and the F s is the cost of unit biomass pellets;

[0114] The β is an influence factor of temperature in the farm on the health of livestock and poultry, the d is the number of time periods divided per day, the T in (t) is a real-time temperature in the farm at time t, and the T set (t) is the most suitable temperature for livestock and poultry in the farm at time t.

[0115] Optionally, the renewable heating module 201 further comprises a geothermal heat pump heating unit 2014 and a heat storage water tank 2015;

[0116] The geothermal pump heating unit 2014 is used to obtain heat from underground hot water to heat the farm.

[0117] The hot water storage tank 2015 is used to keep the hot water generated by the solar thermal unit and the geothermal pump heating unit warm.

[0118] Optionally, the control module 203 is specifically used for:

[0119] When the real-time temperature in the farm is detected to be outside the suitable temperature range for the livestock and poultry, the ratio of heat supplied to the farm by the renewable energy heating module and the gas supply module is controlled according to the preset objective function and the real-time temperature in the farm.

[0120] Optionally, the control of the heat ratio provided by the renewable energy heating module and the gas supply module to the farm includes:

[0121] If the real-time temperature is lower than the minimum value of the suitable temperature range, calculate the heat energy Q required for the current farm to reach the suitable temperature range. n ;

[0122] Predict the maximum heat energy Q generated by the biogas heating unit, the solar thermal unit, and the geothermal pump heating unit in the current time period. max ;

[0123] The proportion of heat supplied to the farm by the biogas heating unit, the solar thermal unit, the geothermal pump heating unit, the biomass pellet heating unit, and the gas supply module is controlled according to the adjustment function.

[0124] The adjustment function is:

[0125]

[0126] Wherein, Q i In the given information, i = 1, 2, 3; Q1 represents the heat energy provided by the biogas heating unit; Q2 represents the heat energy provided by the solar thermal unit; Q3 represents the heat energy provided by the geothermal pump heating unit; and Q... i Q corresponding to different values ​​of i less than or equal to max The Q j In the equation, j = 4, 5, Q4 is the heat energy provided by the biomass pellet heating unit, and Q5 is the heat energy provided by the gas supply module.

[0127] Optionally, the step of predicting the maximum heat energy Q generated by the biogas heating unit, the solar thermal unit, and the geothermal pump heating unit in the current time period is respectively... max ,include:

[0128] acquire historical heating data corresponding to the system in a historical period same as the current period;

[0129] establish a heating model corresponding to the system based on the historical heating data;

[0130] predict Q corresponding to the biogas heating unit by the heating model and the current biogas surplus of the biogas heating unit; max predict Q corresponding to the solar heating unit by the heating model and the current illumination data of the period; max predict Q corresponding to the geothermal heating unit by the heating model and the current heat generated per unit time of the geothermal heating unit; max .

[0131] Optionally, the control module 203 is further configured to:

[0132] in the case that the monitored surplus of biogas in the biogas heating unit is higher than the biogas threshold value, preferentially control the biogas heating unit to generate heat energy to heat the farm;

[0133] in the case that the monitored surplus of biogas in the biogas heating unit is not higher than the biogas threshold value, but the current illumination intensity is higher than the illumination threshold value, control the solar heating unit to generate heat energy to heat the farm, and transmit the heat energy generated by the solar heating unit to the biogas heating unit to accelerate biogas fermentation.

[0134] Optionally, the system further comprises an electric energy conversion module:

[0135] in the case that the real-time temperature is higher than the maximum value of the suitable temperature range, convert the remaining energy in the renewable energy heating module into electric energy.

[0136] Optionally, the construction method of the system comprises:

[0137] acquire the single-day operation cost C of the farm before the construction of the system; o ; the C o = L og *F g + L oe *F e + L ow *F w , the L og is the amount of natural gas consumed by the farm per day before the construction of the system, the L oe is the amount of electricity consumed by the farm per day before the construction of the system, and the L ow is the amount of water consumed by the farm per day before the construction of the system;

[0138] The construction area A1 corresponding to the biogas heating unit, the construction area A2 corresponding to the light-heat unit and the number n of geothermal pumps corresponding to the geothermal pump heating unit are determined by building an objective function;

[0139] The building objective function is:

[0140]

[0141] The Q r is the heat energy provided by the system in one day, the Q n is the heat energy required by the farm to reach the suitable temperature range, the C1 is the cost of building a unit area of biogas pool, the C2 is the cost of building a unit area of light-heat unit, the C3 is the cost of a single geothermal pump, and the C p is the cost of establishing a carbonization furnace for burning biogas and biomass particles, the C q is the other cost of establishing the system.

[0142] Optionally, the construction area A1 corresponding to the biogas heating unit is less than or equal to a preset biogas pool area, and the preset biogas pool area is positively correlated with the breeding scale of the farm.

[0143] The construction area A2 corresponding to the light-heat unit is less than or equal to a preset solar panel area, and the preset biogas pool area is less than the roof area of the farm.

[0144] The number n of geothermal pumps corresponding to the geothermal pump heating unit is less than or equal to the maximum required number of geothermal pumps, and the maximum required number of geothermal pumps is positively correlated with the amount of hot water existing underground in the farm.

[0145] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0146] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware, and the aforementioned program can be stored in a computer readable storage medium, and the program executes the steps including the above-mentioned method embodiments when executed; and the aforementioned storage medium includes ROM, RAM, magnetic disc or optical disc and various program code storage media.

[0147] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of heating a farm, characterized by, The application is applied to a heating system of a farm, and the system comprises a renewable energy heating module, a gas supply module and a control module, the renewable energy heating module at least comprises a biogas heating unit, a photo-thermal unit and a biomass particle heating unit; the biogas heating unit is used for converting manure produced by livestock and poultry in the farm into biogas, and converting the biogas into heat to heat the farm; the photo-thermal unit is used for converting collected solar energy into heat to heat the farm; the biomass particle heating unit is used for generating heat by burning biomass particles to heat the farm; the gas supply module is used for generating heat by burning natural gas to heat the farm; The method comprises: monitoring real-time temperature of the farm by the control module; controlling heat proportion of the renewable energy heating module and the gas supply module for heating the farm according to a preset target function and the real-time temperature in the farm; the target function is used for controlling the farm heating system to adjust actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at the minimum operation cost; the target function is: a is a preset weight, L g is the amount of natural gas consumed by the farm per day, F g is the cost of natural gas for the farm, L e is the amount of electricity consumed by the farm per day, F e is the cost of a unit of electricity, L w is the amount of water consumed by the farm per day, F w is the cost of a unit of water, M is the amount of biomass pellets consumed by the farm per day, F s is the cost of a unit of biomass pellets; β is the impact factor of the temperature in the farm on the health of livestock and poultry, d is the number of time periods divided by a single day in (t) is the real-time temperature in the farm at time t set (t) is the most suitable temperature for livestock and poultry in the farm at time t the renewable energy heating module further comprises a geothermal heat pump heating unit and a heat storage water tank; the geothermal heat pump heating unit is used for obtaining heat of underground hot water to heat the farm; the heat storage water tank is used for heat preservation of hot water generated by the photo-thermal unit and the geothermal heat pump heating unit; controlling heat proportion of the renewable energy heating module and the gas supply module for heating the farm according to a preset target function and the real-time temperature in the farm, comprising: when monitoring that the real-time temperature in the farm is not in the suitable temperature range for livestock and poultry in the farm, controlling heat proportion of the renewable energy heating module and the gas supply module for heating the farm according to a preset target function and the real-time temperature in the farm; controlling heat proportion of the renewable energy heating module and the gas supply module for heating the farm, comprising: in case said real-time temperature is lower than a minimum value of said suitable temperature interval, calculating a heat energy Q needed for the current farm to reach said suitable temperature interval n ; respectively predict a maximum value Q of thermal energy produced by the biogas heating unit, the photo-thermal unit and the geothermal pump heating unit in a current time period max ; controlling heat proportion of the biogas heating unit, the photo-thermal unit, the geothermal heat pump heating unit, the biomass particle heating unit and the gas supply module for heating the farm according to an adjustment function; the adjustment function is: wherein, Q i i = 1, 2, 3, Q1 is the heat energy provided by the biogas heating unit, Q2 is the heat energy provided by the photo-thermal unit, Q3 is the heat energy provided by the ground source heat pump heating unit, Q i i is less than or equal to the corresponding Q max , Q j j = 4, 5, Q4 is the heat energy provided by the biomass particle heating unit, and Q5 is the heat energy provided by the gas supply module.

2. The method of claim 1, wherein, said respectively predicting a maximum of thermal energy Q produced by said biogas heating unit, said solar thermal unit and said geothermal heat pump heating unit at a current time period max comprising: obtaining historical heating data corresponding to the system in a historical period same as a current period; establishing a heating model corresponding to the system based on the historical heating data; predicting Q corresponding to the biogas heating unit by the heating model and the current biogas surplus corresponding to the biogas heating unit max predicting Q corresponding to the photo-thermal unit by the heating model and the current period of light data max predicting Q corresponding to the ground source heat pump heating unit by the heating model and the current heat generated per unit time corresponding to the ground source heat pump heating unit max .

3. The method according to any of claims 1-2, characterized in that, the method further comprises: when monitoring that the remaining amount of biogas in the biogas heating unit is higher than a biogas threshold value, preferentially controlling the biogas heating unit to generate heat energy to heat the farm; when monitoring that the remaining amount of biogas in the biogas heating unit is not higher than the biogas threshold value, but the current light intensity is higher than a light threshold value, controlling the photo-thermal unit to generate heat energy to heat the farm, and transmitting the heat energy generated by the photo-thermal unit to the biogas heating unit to accelerate biogas fermentation.

4. The method according to any one of claims 1-2, characterized in that, the method further comprises: In the case that the real-time temperature is higher than the maximum value of the suitable temperature range, the remaining energy in the renewable energy heating module is converted into electric energy.

5. The method according to any of claims 1-2, characterized by, The system building method comprises: Obtain the daily operating cost C of the farm for heating before the system was installed. o C o =L og *F g +L oe *F e +L ow *F w L og L represents the daily natural gas consumption of the farm before the system was installed. oe L represents the daily electricity consumption of the farm before the system was installed. ow This refers to the daily water consumption of the farm before the system was installed. The construction area A1 corresponding to the biogas heating unit, the construction area A2 corresponding to the light-heat unit and the number n of geothermal pumps corresponding to the geothermal pump heating unit are determined by building an objective function; The objective function is: Q r the heat energy provided by the system for a single day, Q n the heat energy required by the farm to reach the appropriate temperature interval, C1 is the cost of building a biogas tank per unit area, C2 is the cost of building a light-heat unit per unit area, C p the cost of establishing a carbonization furnace for burning biogas and biomass particles, C q other costs of establishing the system.

6. The method of claim 5, wherein, The construction area A1 corresponding to the biogas heating unit is less than or equal to a preset biogas pool area, and the preset biogas pool area is positively correlated with the breeding scale of the farm; The construction area A2 corresponding to the light-heat unit is less than or equal to a preset solar panel area, and the preset biogas pool area is less than the roof area of the farm; The number n of geothermal pumps corresponding to the geothermal pump heating unit is less than or equal to the maximum required number of geothermal pumps, and the maximum required number of geothermal pumps is positively correlated with the amount of hot water existing underground in the farm.

7. A farm heating system, characterized in that Based on the method of any one of claims 1-6, comprising: a renewable energy heating module, a gas supply module and a control module; The renewable energy heating module at least comprises a biogas heating unit, a light-heat unit and a biomass pellet heating unit; The biogas heating unit is used to convert the manure produced by livestock and poultry in the farm into biogas, and convert the biogas into heat to heat the farm; the light-heat unit is used to convert the collected solar energy into heat to heat the farm; the biomass pellet heating unit is used to generate heat by burning biomass pellets to heat the farm; The gas supply module is used to generate heat by burning natural gas to heat the farm; The control module is used to control the heat proportion of the renewable energy heating module and the gas supply module for heating the farm according to a preset objective function and the real-time temperature in the farm; the objective function is used to control the farm heating system to adjust the actual temperature in the farm to the most suitable temperature for livestock and poultry in the farm at the minimum operating cost; The objective function is: a is a preset weight, L g is the amount of natural gas consumed by the farm per day, F g is the cost of natural gas for the farm, L e is the amount of electricity consumed by the farm per day, F e is the cost of a unit of electricity, L w is the amount of water consumed by the farm per day, F w is the cost of a unit of water, M is the amount of biomass pellets consumed by the farm per day, F s is the cost of a unit of biomass pellets; β is the impact factor of the temperature in the farm on the health of livestock and poultry, d is the number of time periods divided by a single day in (t) is the real-time temperature in the farm at time t set (t) is the most suitable temperature for livestock and poultry in the farm at time t

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