Commercial building key load terrestrial heat fine regulation and control method and system

Abstract

The invention relates to the field of terrestrial heat regulation and control, in particular to a commercial building key load terrestrial heat refined regulation and control method and system. The method comprises the steps that key parameters such as geothermal recharge temperature, secondary network return water temperature and heat pump unit load rate are collected in real time; based on the deviation between the recharge temperature and a set value, the geothermal exploitation flow is dynamically adjusted through a closed-loop control algorithm; in combination with the secondary network return water temperature and the heat pump load rate, the heat pump unit is adjusted to add, reduce or maintain operation; and when the heat pump output reaches the upper limit and is still not matched, the municipal heat source intervenes in supplement and quits after the load is reduced. According to the scheme, autonomous and flexible adaptation of the severe fluctuation heat load of the commercial building is achieved, frequent shutdown of the heat pump under the low-load working condition is avoided, the geothermal exploitation flow is accurately matched with the real-time heat load, the geothermal recharge temperature is reduced, and the problems that traditional regulation and control cannot cope with load fluctuation, heat pump shutdown, the recharge temperature exceeds the standard and the like are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of geothermal regulation, and more particularly to a method and system for refined geothermal regulation of critical loads in commercial buildings. Background Technology

[0002] With the increasing demand for clean energy, medium-deep geothermal energy, with its abundant reserves and environmentally friendly efficiency, has become an important choice for heating commercial buildings. However, the heat load of commercial buildings exhibits significant and drastic fluctuations, with marked differences between weekdays and nighttimes, as well as holidays, large peak-to-valley differences, and highly concentrated heating periods. This places stringent demands on the regulation capabilities of medium-deep geothermal heating systems. Currently, the mainstream regulation method in the industry is still mainly based on traditional manual experience, relying on operators' on-site observation, historical operating experience, and manual operation. A rough match between heat supply and load is achieved through a cycle of "limited data - experience judgment - manual operation." This regulation method lacks quantitative control models and automated feedback mechanisms. The perception is based solely on sensory observation and basic instrument readings, and the execution process relies entirely on manual adjustment of valve openings, equipment start-up and shutdown, and parameter settings. The feedback loop cycle is as long as 1-3 hours, making it impossible to respond in real time to the dynamic changes in the heat load of commercial buildings.

[0003] This has led to a series of key issues: On the one hand, traditional manual regulation struggles to dynamically adapt medium-deep geothermal heating systems to the drastically fluctuating heat loads of commercial buildings, often resulting in heat supply lagging behind load changes, leading to periods of overheating or undercooling and affecting heating comfort. On the other hand, during low-load conditions in commercial buildings at night and on holidays, the heat load is often lower than the minimum operating load of the heat pump units, causing frequent shutdowns and even paralyzing the entire geothermal heating system. Simultaneously, because geothermal well extraction flow rate regulation relies on manual judgment and lacks a precise matching mechanism with real-time heat load, mismatches between extraction flow rate and heat load often occur, leading to excessively high geothermal reinjection temperatures, wasting geothermal energy and potentially causing geological environmental problems. Although some existing geothermal regulation platforms have implemented basic parameter monitoring and simple regulation functions, and research has conducted related intelligent regulation algorithm studies, they generally lack subsystem coordination capabilities and large-scale engineering practice verification, failing to solve the core challenge of autonomous and flexible regulation under drastically fluctuating heat loads in commercial buildings. Summary of the Invention

[0004] This invention provides a method and system for fine-grained control of geothermal loads in commercial buildings, aiming to solve the problems that traditional control methods cannot address, such as fluctuations in heat load, heat pump shutdowns, and excessive reinjection temperatures in commercial buildings.

[0005] To achieve the above objectives, the following technical solution is adopted.

[0006] A method for refined control of geothermal loads in commercial buildings includes the following steps: Real-time acquisition of actual measured values ​​of geothermal reinjection temperature, secondary network return water temperature, and key system operating parameters such as heat pump unit load rate; Based on the deviation between the actual measured value of geothermal reinjection temperature and the preset geothermal reinjection temperature setting value, the geothermal extraction flow rate is dynamically adjusted through a closed-loop control algorithm. Based on the secondary network return water temperature and the heat pump unit load rate, determine the matching status between the total output of the heat pump system and the demand heat load, and perform the operation of adding, reducing or maintaining the heat pump unit according to the matching status. When the total output of the heat pump system reaches its upper limit and is still not matched, the municipal heat source is controlled to intervene to supplement the heat. When the load decreases, the municipal heat source is controlled to shut down.

[0007] Optionally, the steps for dynamically adjusting the geothermal extraction flow rate using a closed-loop control algorithm specifically include: Calculate the deviation E between the actual measured value PV of geothermal reinjection temperature and the set value SV of geothermal reinjection temperature, where the deviation E = SV - PV; The deviation E is input into the preset PID control algorithm, and the frequency control quantity u(k) is obtained after proportional, integral and derivative operations. Based on the frequency control quantity u(k), a frequency adjustment command is sent to the geothermal extraction variable frequency water pump to adjust the pump's operating frequency and change the geothermal extraction flow rate, so that the actual measured value PV of the geothermal reinjection temperature approaches the set value SV of the geothermal reinjection temperature, thereby matching the geothermal extraction flow rate with the real-time heat load of the commercial building.

[0008] Optionally, the steps for adding, removing, or maintaining the heat pump unit based on its matching status specifically include: When the secondary network return water temperature is lower than the set value of the heat pump unit temperature or the load rate of the heat pump unit is higher than the set value of the heat pump unit load rate, and the number of currently running heat pump units is less than the maximum number of available units, the heat pump unit addition operation is triggered, and a new heat pump unit and its corresponding circulating water pump and electric valve are started in a preset sequence. When the secondary network return water temperature is higher than the reduced heat pump temperature setting value and the heat pump unit load rate is lower than the reduced heat pump load rate setting value, and the number of currently operating heat pump units is greater than or equal to one, the reduced heat pump operation is triggered. One operating heat pump unit and its auxiliary equipment are stopped in a preset sequence, and the number of operating heat pump units is dynamically adjusted to match the total output of the heat pump system with the demand heat load, and to maintain the operation of each heat pump unit within the safe operating load range.

[0009] Optionally, the preset sequence of adding and removing machines includes the logic for starting and stopping the equipment and the control of the interval time. The sequence of adding the unit is as follows: First, open the electric valve of the heat pump unit corresponding to the target heat pump unit. After receiving the feedback signal that the valve is fully open, start the evaporator and condenser circulating water pumps corresponding to the target heat pump unit. After a first preset time delay, start the target heat pump unit. The sequence of the heat pump unit reduction operation is as follows: First, stop the target heat pump unit. After a second preset time delay, stop the corresponding evaporator and condenser circulating water pumps. After a third preset time delay, finally close the electric valve of the heat pump unit corresponding to the target heat pump unit.

[0010] Optionally, a protective control step for the intermediate water temperature may also be included: Real-time monitoring of the intermediate water temperature on the evaporator side of the heat pump unit; When the intermediate water temperature reaches the preset high limit, close the electric valve on the primary side of the geothermal secondary plate heat exchanger and simultaneously fully open the electric valve on the bypass side of the geothermal secondary plate heat exchanger to cut off the geothermal water flow through the geothermal secondary plate heat exchanger, thereby lowering the intermediate water temperature. When the intermediate water temperature drops to the preset lower limit, the electric valve on the primary side of the geothermal secondary plate heat exchanger is opened and the bypass electric valve of the geothermal secondary plate heat exchanger is closed at the same time to restore heat exchange in the geothermal secondary plate heat exchanger, so that the intermediate water temperature rises and is stabilized within the allowable range for safe operation of the heat pump unit.

[0011] Optionally, the specific logic for controlling the intervention and withdrawal of municipal heating sources includes: The conditions for municipal heat source intervention are that the secondary network return water temperature is lower than the intervention temperature set value, the heat pump unit load rate is higher than the intervention load rate set value, and the number of currently operating heat pump units has reached the maximum available number. When the above conditions are met simultaneously, the municipal primary network electric regulating valve and the municipal plate heat exchanger circulation pump are started. The conditions for municipal heat source withdrawal are that the secondary network return water temperature is higher than the withdrawal temperature setting value, the heat pump unit load rate is lower than the withdrawal load rate setting value, and the number of currently operating heat pump units is greater than or equal to one. When the above conditions are met simultaneously, the municipal primary network electric regulating valve and the municipal plate heat exchanger circulation pump are controlled to close. The intervention and withdrawal actions of the municipal heat source are set with a minimum time interval to prevent frequent switching.

[0012] A precision geothermal control system for critical loads in commercial buildings, comprising a process subsystem, a sensing layer, an execution layer, and a control layer; The process subsystem includes a medium-deep geothermal extraction and reinjection subsystem, a high-temperature heat pump heating subsystem, and a municipal heat source auxiliary subsystem. The medium-deep geothermal extraction and reinjection subsystem consists of a geothermal extraction well, a reinjection well, a primary geothermal plate heat exchanger, and a secondary geothermal plate heat exchanger connected by pipelines. The high-temperature heat pump heating subsystem consists of at least two parallel water source heat pump units and corresponding circulating water pumps connected by pipelines. The municipal heat source auxiliary subsystem consists of a municipal primary heating network, a municipal plate heat exchanger, and a municipal plate heat exchanger circulating pump connected by pipelines. The sensing layer includes temperature sensors, pressure transmitters, and flow meters deployed at key nodes of each process subsystem to collect key parameters of system operation. The execution layer includes a geothermal extraction variable frequency water pump, multiple electric valve actuators, a water source heat pump unit controller, and a circulating water pump controller. The control layer is centered on a programmable logic controller (PLC). The PLC connects the sensors in the sensing layer to the controllers and actuators in the execution layer via a communication network. The PLC stores and runs the control program of the method to coordinate and control the operation of the three process subsystems.

[0013] Optionally, the sensors deployed in the sensing layer specifically include: geothermal reinjection temperature sensors and pressure transmitters installed on the geothermal reinjection pipeline; geothermal extraction temperature sensors, pressure transmitters, and flow meters installed on the geothermal extraction pipeline; plate heat exchanger temperature sensors installed at the inlet and outlet of the primary and secondary geothermal plate heat exchangers on both sides; heat pump temperature and pressure sensors installed at the inlet and outlet of the evaporator and condenser sides of each water source heat pump unit; secondary network return water temperature sensors installed on the secondary network return water main pipe; and municipal plate heat exchanger temperature sensors installed at the inlet and outlet of the municipal plate heat exchangers on both sides, together forming a parameter monitoring network covering the entire system.

[0014] Optionally, the multiple electric valve actuators of the execution layer specifically include: a primary-side electric valve for the geothermal secondary plate heat exchanger installed on the primary-side inlet pipe of the geothermal secondary plate heat exchanger, a bypass electric valve for the geothermal secondary plate heat exchanger installed on its bypass pipe, a heat pump unit electric valve installed on the evaporator-side inlet pipe of each water source heat pump unit, a municipal primary network electric regulating valve installed on the municipal primary heating network access pipe, and branch regulating valves installed on each branch pipe of the secondary network manifold; the geothermal extraction variable frequency water pump is installed in the geothermal extraction well; the water source heat pump unit controller is built into each unit; and the circulating water pump controller is matched with each circulating water pump.

[0015] Optionally, the programmable logic controller (PLC) of the control layer is integrated with the sensing and execution layer devices via industrial Ethernet or fieldbus to realize data acquisition and command issuance. The PLC is also connected to a human-machine interface (HMI) to display real-time system operating parameters, equipment status, alarm information, and to provide a setting interface for geothermal reinjection temperature setpoints, booster / debooster temperature setpoints, and intervention / exit temperature setpoints. The PLC's internal program modularly integrates a geothermal flow control module, a heat pump collaborative control module, and a municipal heat source regulation module.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This application achieves autonomous and flexible adaptation to drastic fluctuations in the heat load of commercial buildings by real-time collection of key operating parameters such as geothermal reinjection temperature, secondary network return water temperature, and heat pump unit load rate. It dynamically adjusts the geothermal extraction flow rate based on the reinjection temperature deviation, adjusts the number of heat pumps in operation in combination with the secondary network return water temperature and heat pump load rate, and, when necessary, links with municipal heat sources for supplementation. This effectively avoids frequent shutdowns of heat pump units under low load conditions, while ensuring precise matching between geothermal well extraction flow rate and real-time heat load, significantly reducing geothermal reinjection temperature. It successfully solves the core problems of traditional control methods being unable to cope with heat load fluctuations, heat pump shutdowns, and excessive reinjection temperatures in commercial buildings. By employing a closed-loop control algorithm to finely regulate geothermal extraction flow, and dynamically outputting frequency control commands based on the deviation between the actual measured value and the set value of the reinjection temperature, the system can quickly respond to load changes, ensuring that the geothermal reinjection temperature remains stable within the target range, further improving the accuracy of heat load matching. Through clearly defined conditions for adding or removing heat pump units and scientific control of equipment start-up and shutdown sequences and time intervals, the system ensures a dynamic balance between the total output of the heat pump system and the demand load, while maintaining the operation of individual heat pump units within their safe operating load range, extending equipment lifespan. The protective control logic for intermediate water temperature, by switching the on / off state of the geothermal secondary plate heat exchanger and bypass pipeline, stabilizes the intermediate water temperature within the safe operating range for the heat pump. Throughout the entire operating range, the continuous and stable operation of the heat pump unit is further guaranteed; the precise judgment logic and minimum time interval setting for the intervention and withdrawal of municipal heat sources effectively avoid frequent switching of supplementary heat sources, improving the overall stability and energy efficiency of the system; and the system architecture covering process subsystems, sensing layer, execution layer and control layer, through the full-process parameter monitoring network, reasonable deployment of execution equipment and the coordinated scheduling of core controllers, realizes the efficient linkage of each subsystem, ensures the accurate implementation of various control strategies, significantly improves the utilization efficiency of geothermal energy, reduces heating costs, and at the same time, through comprehensive parameter monitoring and fault alarm mechanisms, ensures the long-term safe and stable operation of the heating system. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the control flow of an embodiment of the method for refined control of geothermal loads in commercial buildings according to the present invention.

[0018] Figure 2 This is a schematic diagram of the geothermal fine control system module for critical loads in commercial buildings according to the present invention.

[0019] Figure 3 This is a simplified process diagram of the process subsystem of the critical load geothermal fine control system for commercial buildings according to the present invention.

[0020] Figure 4 This invention provides a flowchart of the process for adjusting the heating operation of a heat pump unit under different conditions, which is part of the method for fine-tuning geothermal loads in commercial buildings.

[0021] Figure 5 This invention provides a flow chart of the heating operation of a heat pump unit for the refined control of geothermal loads in commercial buildings.

[0022] Figure 6 This invention provides a flowchart of the frequency conversion adjustment process for the circulating water pump of a heat pump unit in a method for finely controlling geothermal loads in commercial buildings.

[0023] Figure 7 This invention provides a flow chart of the plate heat exchanger control method for the critical load geothermal fine regulation of commercial buildings. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0025] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. Example 1

[0026] like Figure 1 As shown, this embodiment applies to a heating system consisting of a single-extraction, single-injection deep geothermal well, primary and secondary geothermal plate heat exchangers connected in series, two parallel water source heat pump units, and three parallel municipal plate heat exchangers. It serves a commercial building area with a total designed heating area of ​​332,800 square meters (heat load 23.82 MW) and an actual heating area of ​​35,000 square meters (load rate 10%), encompassing different functional zones such as office areas, shopping malls, and hotels. This area is characterized by significant differences in heat load between day and night, and between weekdays and holidays, with a relatively low actual load. Furthermore, the actual pumping volume of the geothermal well is 128 m³ / h. 3 / h (Design 110m) 3The actual water output parameters are higher than the design values, with an output water temperature of 56℃ (design temperature 54℃). This leads to excessive reinjection temperature and easy shutdown of the heat pump due to low load under traditional control methods. This method specifically solves these problems and achieves fine control of the heat load range from 0% to 100%.

[0027] The system collects key operational parameters in real time, comprehensively covering the core parameters of the entire process of geothermal well systems, heat pump unit systems, municipal heat exchange systems, and secondary network systems, ensuring no data omissions. Specifically, the parameters collected for the geothermal well system include the operating status, frequency, current, voltage, and power consumption of the extraction pump; the temperature, pressure, instantaneous flow rate, and cumulative flow rate of the geothermal extraction pipeline; the temperature, pressure, instantaneous flow rate, and cumulative flow rate of the reinjection pipeline; the inlet and outlet temperatures of both sides of the primary geothermal plate heat exchanger; the inlet and outlet temperatures of both sides of the secondary geothermal plate heat exchanger; and the downhole liquid level. The parameters collected for the heat pump unit system include the inlet and outlet temperatures and pressures of the evaporator and condenser sides of each unit; the intermediate water temperature (corresponding to measuring point TT307); and the unit's current, voltage, target capacity percentage, target volume percentage, and operating parameters. The system collects data on the following parameters: operating status, corresponding circulation pump operating status, frequency, current, voltage, and power consumption; start-up, stop, remote / local status, and opening degree of the heat pump unit's electric valves; municipal heat exchange system parameters include inlet and outlet temperatures, pressures, flow rates, and heat consumption of both sides of the municipal plate heat exchanger; status and opening degree of the municipal primary network electric regulating valves; and operating status, frequency, current, voltage, and power consumption of the municipal plate heat exchanger circulation pumps. Secondary network system parameters include supply and return water temperatures, pressures, flow rates, and heat consumption of each branch pipeline; status and opening degree of the branch regulating valves; and operating status, frequency, current, voltage, and power consumption of the circulation pumps. The data acquisition equipment uses temperature sensors (PT100 and DS18B20 models) with an accuracy of 0.1℃, pressure transmitters, high-precision flow meters, and integrators. Analog signals are converted to digital quantities and transmitted to the control core via industrial Ethernet or fieldbus. This simultaneously achieves unified acquisition and control of data from the geothermal well PLC control cabinet and the central control room PLC control cabinet, breaking down data silos and ensuring real-time, accurate, and interoperable data acquisition.

[0028] Based on the deviation between the actual measured value of the geothermal reinjection temperature and the preset geothermal reinjection temperature setpoint, the geothermal extraction flow rate is dynamically adjusted through a closed-loop control algorithm, strictly adhering to the principles of "cascade heat exchange" and "dynamic regulation". The geothermal reinjection temperature setpoint is set at 15℃, with a safety margin reserved to meet the requirement of reinjection temperature ≤20℃ in the DB11 / T2039-2022 standard. First, the deviation E between the actual measured value PV and the setpoint SV of the geothermal reinjection temperature is calculated. The deviation E is calculated as E=SV-PV. The deviation E is input into the preset PID control algorithm, and the frequency control quantity u(k) is obtained through the weighted sum of the proportional, integral, and derivative operations. The frequency control quantity u(k) directly corresponds to the frequency adjustment increment of the geothermal extraction variable frequency pump.

[0029] The calculation formula for the PID control algorithm is as follows: ; It can be divided into the following three parts: 1) P=K p ·E(k); P represents proportional adjustment; adjust the amount immediately according to the current difference. K p =1.0~2.0, which is the proportionality coefficient; E(k) = SV - PV, which is the set reinjection temperature SV minus the actual measured reinjection temperature PV, i.e., the temperature deviation.

[0030] High reinjection temperature: E(k) negative → P negative → pump frequency reduction; Low reinjection temperature: E(k) positive → P positive → pump frequency increase; Function: Quickly draws the temperature toward the target.

[0031] 2) I = ; I represents integral control, which eliminates steady-state error and prevents the temperature from deviating continuously. K i =0.1~0.3, integral coefficient; , By accumulating all past deviations, I will gradually increase its output as long as the temperature does not reach the target; its function is to completely eliminate steady-state error.

[0032] 3) D=K d ·[E(k)-E(k-1)]; D represents differential adjustment, which anticipates trends and brakes in advance. K d =0.1-0.3, differential coefficient; E(k)-E(k-1) is the temperature difference at the current time minus the temperature difference at the previous time.

[0033] Functions: Prevents overshoot, prevents oscillation, and provides greater stability.

[0034] 2. Core Logic: 1) Measure the reinjection temperature (PV) 2) Calculate the deviation: E(k) = SV - PV; SV = 15℃ 3) Calculate the pump frequency u(k) using the PID formula. 4) Output to the frequency converter to change the mining flow rate: High temperature → reduced frequency → reduced flow rate → temperature drops.

[0035] Low temperature → Increase frequency → Increase flow rate → Temperature rises.

[0036] 5) Repeat the process to stabilize the recharge temperature at the set value.

[0037] The geothermal extraction variable frequency pump is installed 50 meters below the geothermal well level. It supports setting automatic upper and lower limits for frequency adjustment, with the lower limit set at 30Hz to ensure stable pump operation. When the actual measured value of the geothermal reinjection temperature (PV) is higher than the set value (SV), it indicates that the geothermal extraction flow rate is too high, and the geothermal fluid has not fully released heat in the heat exchange stage. At this time, the control core outputs a command to reduce the frequency of the variable frequency pump, thereby reducing the extraction flow rate to prolong the heat exchange time of the geothermal fluid. This allows the geothermal water to flow through the primary and secondary plate heat exchangers in sequence to fully release heat until the reinjection temperature drops to near the set value. When the actual measured value of the geothermal reinjection temperature (PV) is lower than the set value (SV), it indicates that the geothermal extraction flow rate is too low, and the heat input to the heat exchange system is insufficient. At this time, the control core outputs a command to increase the frequency of the variable frequency pump, thereby increasing the extraction flow rate to improve the heat supply to the heat exchange system. When the deviation between the actual measured value of the geothermal reinjection temperature (PV) and the set value (SV) is within the allowable range, the control core maintains the current pump frequency output to maintain stable system operation. Simultaneously, by comparing the evaporator-side hot water temperature (TT307) with the preset temperature, the opening of the geothermal secondary plate heat exchanger electric valves (ZV309 and ZV310) is adjusted synchronously to control the geothermal heat exchange flow rate and ensure the target temperature stability. An interlocking control logic is established between the geothermal bypass valve (ZV312) and the valve opening of ZV309 (or ZV310), ensuring that the sum of the openings of ZV309 (or ZV310) and ZV312 is always 100%, thus ensuring coordinated control of the bypass and geothermal side pipeline valves. When only one unit is operating and the extraction pump is at its lowest frequency, the opening of valve ZV312 is adjusted according to the total geothermal supply and return water pressure difference to ensure the flow rate required for safe unit operation.

[0038] like Figure 4 and Figure 5As shown, based on the secondary network return water temperature and the heat pump unit load rate, the system determines the matching status between the total output of the heat pump system and the demand heat load. Based on the matching status, it performs operations to add, remove, or maintain the heat pump units, ensuring that a single heat pump unit continuously operates at a load ≥25%, and that two units working together meet the user's load of 60%-100%. The added unit temperature setting is the preset value of the secondary network return water temperature plus a default value, and the added unit load rate setting is 90% of the rated load rate of a single unit. When the secondary network return water temperature is lower than the added unit temperature setting or the heat pump unit load rate is higher than the added unit load rate setting, and the number of currently operating heat pump units is less than the maximum available number (2 units), the added unit operation is triggered. The addition of heat pump units follows a preset sequence: First, the electric valve corresponding to the target heat pump unit is opened. The control core continuously monitors the valve status. Upon receiving a feedback signal indicating that the valve is fully open, the evaporator-side circulation pump and condenser-side circulation pump corresponding to the target heat pump unit are started. After a 30-second delay, the target heat pump unit is started. If, during startup, the electric valve does not receive a full-open feedback signal within 60 seconds, the water pump does not receive an operation feedback signal within 10 seconds, or the unit does not receive a startup success feedback signal within 300 seconds, a control failure alarm is issued. The reduction temperature setting is the preset value plus the default value of the secondary network return water temperature. The reduction load rate setting is 40% of the rated load rate of a single unit. When the secondary network return water temperature is higher than the reduction temperature setting and the heat pump unit load rate is lower than the reduction load rate setting, and the number of currently operating heat pump units is greater than or equal to one, the reduction operation is triggered. The heat pump unit reduction operation is executed according to a preset sequence: first, the target heat pump unit is stopped; after a 300-second delay, its corresponding evaporator-side circulating pump and condenser-side circulating pump are stopped; after a 30-second delay, the electric valve of the corresponding heat pump unit is closed. To prevent frequent additions and removals of units, the minimum interval between these operations is set to 30 minutes. After each addition or removal, the same operation will not be performed again within 30 minutes. Each time the system is started, shut down, or a unit is added or removed, the main unit and circulating water pumps follow the principle of balanced operating time, prioritizing the start of the equipment with the shortest operating time and prioritizing the shutdown of the equipment with the longest operating time to ensure even wear of the equipment. Figure 6 As shown, the variable frequency control of the circulating water pump is based on the pressure difference between the main supply and return water of the distributor / manufacturer and the pressure difference between the supply and return water at the most unfavorable point, and the two are sorted according to a preset priority. Figure 6The "<" indicates priority. The pressure difference factor at the most unfavorable point has a higher priority than the pressure difference factor of the manifold. When a higher-priority pressure difference parameter fails to reach its set value for 5 minutes, that parameter is used as the basis for the frequency conversion adjustment of the circulating water pump. When the supply and return water pressure difference of the main pipe of the manifold is lower than the lower limit for 5 minutes, the pump operating frequency is increased; when it is higher than the upper limit for 5 minutes, the pump operating frequency is decreased (down to a minimum of 30Hz). The adjustment logic for the supply and return water pressure difference at the most unfavorable point is the same. The water replenishment system adopts an automatic constant pressure water replenishment device. The control core monitors the operating status of the water replenishment pump, fault alarms, and high and low water level alarms of the water replenishment tank in real time to ensure stable system pressure.

[0039] The method also includes a protective control step for the intermediate water temperature, which involves real-time monitoring of the intermediate water temperature on the evaporator side of the heat pump unit (corresponding to measuring point TT307). The upper limit of the intermediate water temperature is set to 30℃, and the lower limit is set to 15℃. The valve switching time is set to 30 seconds, and ZV309, ZV310, and ZV312 are ensured to be in remote control mode. When the intermediate water temperature rises to 30℃, the high-limit control logic is triggered, and the control core issues a command to close valves ZV309 and ZV310, while simultaneously fully opening valve ZV312 to cut off the geothermal water flow through the geothermal secondary plate heat exchanger, causing the intermediate water temperature to drop rapidly. When the intermediate water temperature drops to 15℃, the low-limit control logic is triggered, and the control core issues a command to open valves ZV309 and ZV310, while simultaneously closing valve ZV312, restoring normal heat exchange in the geothermal secondary plate heat exchanger, causing the intermediate water temperature to rise again, ensuring that the intermediate water temperature remains stable within the allowable range for safe operation of the heat pump unit, and preventing the unit from shutting down due to abnormal temperature alarms.

[0040] The logic for controlling the intervention and withdrawal of municipal heat sources strictly follows the principle of "geothermal as the primary source, supplemented by municipal heat." Municipal heat sources are only used as peak-shaving supplementary energy, and the supplementary amount can be reduced or even shut down based on weather and user load changes. The municipal heat source intervention temperature setpoint is the secondary network return water temperature preset value plus a default value. The intervention load rate setpoint is 100% of the rated load rate of a single unit. Municipal heat source intervention is triggered when the secondary network return water temperature is lower than the intervention temperature setpoint, the heat pump unit load rate is higher than the intervention load rate setpoint, and the number of currently operating heat pump units has reached the maximum available number (2 units). The intervention process is as follows: The control core first confirms that the intervention conditions are met, then confirms the opening status of the secondary side electric valve of the municipal heat exchanger, then starts the municipal heat exchanger circulation pump, and finally starts the automatic flow control function of the municipal heat exchanger electric regulating valve, entering the automatic flow control process. The municipal heat source exit temperature setting is the secondary network return water temperature preset value plus a default value. The exit load rate setting is 40% of the rated load rate of a single unit. Municipal heat source exit is triggered when the secondary network return water temperature is higher than the exit temperature setting, the heat pump unit load rate is lower than the exit load rate setting, and the number of currently operating heat pump units is greater than or equal to one. The exit process is as follows: the control core first confirms that the exit conditions are met, then closes the municipal heat exchanger's electric regulating valve, and finally closes the municipal heat exchanger's circulating pump. To prevent frequent intervention and exit of the municipal heating system, the minimum interval between intervention and exit operations is set to 30 minutes. After each intervention or exit, the same operation will not be performed within 30 minutes. Figure 7 As shown, when municipal heat is introduced, the primary and secondary geothermal plate heat exchangers continue to operate as the base load. The municipal plate heat exchanger adjusts the opening of the primary side electric valve by comparing the outlet water temperature on the secondary side with the preset temperature to control the heat exchange capacity of the municipal plate heat exchanger. The circulating pump of the municipal plate heat exchanger is a variable frequency pump, and its control logic is the same as that of the circulating water pump of the heat pump unit.

[0041] During system operation, the control core supports the normalization conversion of heterogeneous protocols in the industrial field. It can uniformly map data from different protocols such as Modbus RTU / TCP, OPCUA / DA, Profinet, and CANopen to standardized protocols compatible with the upper-level platform (such as MQTT, AMQP, HTTP / HTTPS, and CoAP), achieving seamless connection of system links. Fault and alarm handling mechanisms are implemented throughout the entire process: During startup, the equipment self-checks its readiness. If a fault is found and a replacement device exists (such as a municipal heat pump unit that can be replaced), a warning message is issued and the system automatically switches to the replacement device; if no replacement device exists, a warning message is issued and the system shuts down. During operation, if a fault occurs, the control core immediately issues a warning message and shuts down the equipment. If a replacement device exists, it automatically starts up; otherwise, a warning message is issued and the system shuts down, ensuring safe system operation. Example 2

[0042] like Figure 2 As shown, this embodiment is constructed based on the above-mentioned method for fine-grained control of geothermal loads in commercial buildings. It is applicable to heating systems consisting of a single-extraction and single-injection deep geothermal well, primary and secondary geothermal plate heat exchangers connected in series, two parallel water source heat pump units, and three parallel municipal plate heat exchangers. It serves commercial building areas with multiple functions such as office areas, shopping malls, and hotels. It specifically addresses the problems of traditional systems, such as lack of remote control capabilities, low level of intelligence, and insufficient utilization of geothermal resources, and realizes dynamic matching and fine-grained control of geothermal heating system and commercial building heat load.

[0043] The system includes a process subsystem, a sensing layer, an execution layer, and a control layer. These parts work together to form a complete heating regulation system. Heating is achieved through a multi-source coupling method of "geothermal extraction + heat pump heating + municipal heat supplementation". The core relies on the coordinated operation of four cycles: medium-deep geothermal extraction-reinjection cycle, heat pump heating cycle, municipal heat source auxiliary cycle, and user-side heating cycle.

[0044] like Figure 3As shown, the process subsystem includes a medium-deep geothermal extraction and reinjection subsystem, a high-temperature heat pump heating subsystem, and a municipal heat source auxiliary subsystem. The medium-deep geothermal extraction and reinjection subsystem consists of a geothermal extraction well, a reinjection well, a primary geothermal plate heat exchanger, and a secondary geothermal plate heat exchanger connected in series via pipelines. The medium-deep high-temperature geothermal water extracted from the extraction well flows sequentially through the primary geothermal plate heat exchanger and the secondary geothermal plate heat exchanger, transferring heat to the user's return water and the heat pump working fluid (intermediate water). The low-temperature geothermal water, after releasing heat, is reinjected into the ground through the reinjection well, achieving sustainable utilization of geothermal resources. The high-temperature heat pump heating subsystem consists of two parallel water source heat pump units and corresponding circulating water pumps connected by pipelines. The two units are model WCFXHP50TRS-N and WCFXHP54TRS-N, respectively. The WCFXHP50TRS-N corresponds to one set of evaporator-side and condenser-side circulating pumps, while the WCFXHP54TRS-N corresponds to another set. Circulating water pumps of the same type serve as backups for each other, and all are activated under normal operating conditions. In the heat pump heating cycle, the intermediate water absorbs heat in the geothermal secondary plate heat exchanger and then enters the heat pump evaporator. The heat pump, through the work of the compressor, upgrades the low-grade geothermal heat to high-grade heat, which is released in the condenser to heat the user-side return water. The municipal heat source auxiliary subsystem consists of the municipal primary heating network, three parallel municipal plate heat exchangers, and a municipal plate heat exchanger circulation pump connected by pipelines. High-temperature hot water from the municipal primary heating network flows through the municipal plate heat exchangers, transferring heat to the user-side return water, serving as a supplementary heat source to ensure heating stability under extreme conditions. In the user-side heating cycle, the hot water, heated by the geothermal primary plate heat exchanger, heat pump condenser, and municipal plate heat exchanger, is transported to the distributor by the circulation pump. The distributor then distributes the water to each user in the commercial building. Low-temperature return water from the user ends is collected in the collector and then pumped back into the heat exchange equipment to absorb heat again, completing the cycle.

[0045] The sensing layer comprises temperature sensors, pressure transmitters, flow meters, and integrators deployed at key nodes of each process subsystem, forming a parameter monitoring network covering the entire system to ensure no critical parameters are missed. High-precision temperature sensors, such as PT100 and DS18B20, are used, achieving a temperature measurement accuracy of 0.1℃. Specific deployment locations include: geothermal reinjection pipelines with geothermal reinjection temperature sensors and pressure transmitters to monitor reinjection water temperature, pressure, and downhole liquid level; geothermal extraction pipelines with geothermal extraction temperature sensors, pressure transmitters, flow meters, and integrators to monitor extraction water temperature, pressure, instantaneous flow rate, cumulative flow rate, and downhole liquid level; plate heat exchanger temperature sensors installed at both inlet and outlet of the primary and secondary geothermal plate heat exchangers to monitor the fluid temperature on both sides of the heat exchangers; and heat pump temperature sensors installed at the inlet and outlet of the evaporator and condenser sides of each water source heat pump unit. Pressure sensors monitor the thermodynamic parameters of the heat pump operation, and simultaneously collect data on the unit's current, voltage, target capacity percentage, target volume percentage, and operating status. Secondary network return water temperature sensors, pressure transmitters, flow meters, and integrators are installed on the secondary network return water main and branch pipes to monitor the supply and return water temperature, pressure, flow rate, and heat of each branch pipe. Municipal plate heat exchangers have municipal plate heat exchanger temperature sensors, pressure transmitters, and flow meters installed at both inlet and outlet sides to monitor the heat exchange status of the municipal heat source. In addition, the start, stop, remote / local status, and opening degree of electric valves, as well as parameters such as the current, voltage, frequency, and power consumption of the water pump motor / inverter, are all collected through corresponding sensing devices. All data acquisition devices are connected to the control layer via industrial Ethernet or fieldbus to achieve real-time data transmission and unified acquisition.

[0046] The execution layer includes equipment such as geothermal extraction variable frequency water pumps, multiple electric valve actuators, water source heat pump unit controllers, circulating water pump controllers, geothermal extraction well outlet regulating valves, and municipal network regulating valves, comprehensively responding to various control commands issued by the control layer. The geothermal extraction variable frequency water pumps are installed 50 meters below the geothermal extraction well level. They change their operating frequency by receiving frequency adjustment commands to regulate the geothermal extraction flow rate; the frequency adjustment range includes 30Hz to the rated frequency. The multiple electric valve actuators specifically include: ZV309 and ZV310 electric valves on the primary side inlet pipe of the geothermal secondary plate heat exchanger, ZV312 electric valve on its bypass pipe, heat pump unit electric valves on the evaporator side inlet pipe of each water source heat pump unit, municipal primary network electric regulating valves on the municipal primary heating network access pipe, branch regulating valves on each branch pipe of the secondary network manifold, as well as geothermal and municipal plate heat exchanger inlet and outlet electric valves and geothermal extraction well outlet regulating valves. All electric valve actuators support switching between remote and local control modes and have valve open / close feedback functions, allowing real-time valve status feedback to the control layer. The water source heat pump unit controller is built into each unit, receiving start / stop commands and load adjustment commands from the control layer, while simultaneously providing feedback on unit operating status and various parameters. The circulating water pump controller is paired with each circulating water pump, including the evaporator-side and condenser-side circulating pump controllers for the heat pump unit and the municipal plate heat exchanger circulating pump controller, supporting start / stop control and frequency regulation to achieve precise flow and pressure control. Addressing the issue of damaged or missing electric valve assemblies in traditional systems, the system has added and improved electric valves at key locations to ensure the effective execution of control commands.

[0047] The control layer is centered on a programmable logic controller (PLC), integrating and connecting the sensing and execution layers via industrial Ethernet or fieldbus. This enables unified acquisition and control of data from the geothermal well PLC control cabinet and the central control room PLC control cabinet, breaking down data silos. The PLC supports the normalization conversion of heterogeneous protocols in the industrial field, mapping data from different protocols such as Modbus RTU / TCP, OPCUA / DA, Profinet, and CANopen to standardized protocols compatible with the upper-level platform (such as MQTT, AMQP, HTTP / HTTPS, and CoAP), achieving seamless system link integration. The PLC connects to a Human-Machine Interface (HMI), which features multiple functional screens: the process flow screen is the default display, intuitively showing the heat exchange station's process flow diagram and the real-time operating status and key parameter values ​​of each device; the instrument data screen displays real-time data for the entire system, including temperature, pressure, flow rate, heat, current, and voltage; the equipment control screen provides operation interfaces for valve control, pump control, regulating valve control, and intermediate water temperature control, supporting manual parameter setting or switching control modes; the data curve screen displays historical trends of key parameters, facilitating data analysis and fault tracing; the alarm information screen displays real-time system fault alarms and warnings, including fault type, occurrence time, and fault location, and also supports historical alarm information queries; the user management screen is used to set permissions for different operators, ensuring system operational safety. The HMI also provides a parameter setting interface, allowing operators to set key parameters such as geothermal reinjection temperature setpoints, generator / heater temperature setpoints, intervention / exit temperature setpoints, and upper and lower limits for intermediate water temperature, and can store multiple parameter schemes for use under different operating conditions.

[0048] The PLC's internal program modularly integrates a geothermal flow control module, a heat pump co-control module, a municipal heat source regulation module, and a fault detection and alarm module. Each module has a clear division of labor and works in concert. The geothermal flow control module receives parameters such as geothermal reinjection temperature, extraction temperature, flow rate, and pressure collected from the sensing layer. It runs a PID control algorithm to calculate the frequency adjustment command of the geothermal extraction variable frequency water pump and controls the opening of electric valves such as ZV309, ZV310, and ZV312. Following the "cascade heat exchange" principle, it achieves precise control of geothermal extraction flow rate and reinjection temperature. The heat pump co-control module receives parameters such as secondary network return water temperature, heat pump unit load rate, and intermediate water temperature. It determines the matching status of the total output of the heat pump system with the required heat load, executes addition, reduction, or maintenance operations, controls the start-stop sequence and time interval of the heat pump unit and its corresponding circulating pump and electric valve, and simultaneously achieves protective regulation of the intermediate water temperature and variable frequency regulation of the circulating water pump to ensure that the heat pump unit operates stably within the safe load range. The municipal heat source regulation module receives parameters such as secondary network return water temperature, heat pump unit load rate, and number of operating units. It determines the entry and exit conditions of the municipal heat source, controls the start and stop of the municipal primary network electric regulating valve and the municipal plate heat exchanger circulating pump, and regulates the heat exchange capacity of the municipal plate heat exchanger to achieve coordinated operation of the municipal heat source with the geothermal and heat pump systems. The fault detection and alarm module continuously monitors equipment operating status and system parameters. When it detects over-temperature, sensor disconnection, abnormal liquid level, equipment failure, or emergency stop signals, it immediately triggers audible and visual alarms, records fault information, and executes safety interlock actions to ensure safe system operation. The PLC also has data recording and energy consumption optimization functions, periodically storing historical data such as temperature, pressure, flow rate, and energy consumption, supporting trend analysis and report generation, and providing data support for energy-saving optimization.

[0049] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A method for refined control of geothermal loads in commercial buildings, characterized in that, Includes the following steps: Real-time acquisition of actual measured values ​​of geothermal reinjection temperature, secondary network return water temperature, and key system operating parameters such as heat pump unit load rate; Based on the deviation between the actual measured value of geothermal reinjection temperature and the preset geothermal reinjection temperature setting value, the geothermal extraction flow rate is dynamically adjusted through a closed-loop control algorithm. Based on the secondary network return water temperature and the heat pump unit load rate, determine the matching status between the total output of the heat pump system and the demand heat load, and perform the operation of adding, reducing or maintaining the heat pump unit according to the matching status. When the total output of the heat pump system reaches its upper limit and is still not matched, the municipal heat source is controlled to intervene to supplement the heat. When the load decreases, the municipal heat source is controlled to shut down.

2. The method for refined geothermal control of critical loads in commercial buildings according to claim 1, characterized in that, The specific steps for dynamically adjusting geothermal extraction flow rate using a closed-loop control algorithm include: Calculate the deviation E between the actual measured value PV of geothermal reinjection temperature and the set value SV of geothermal reinjection temperature, where the deviation E = SV - PV; The deviation E is input into the preset PID control algorithm, and the frequency control quantity u(k) is obtained after proportional, integral and derivative operations. Based on the frequency control quantity u(k), a frequency adjustment command is sent to the geothermal extraction variable frequency water pump to adjust the pump's operating frequency and change the geothermal extraction flow rate, so that the actual measured value PV of the geothermal reinjection temperature approaches the set value SV of the geothermal reinjection temperature, thereby matching the geothermal extraction flow rate with the real-time heat load of the commercial building.

3. The method for refined geothermal control of critical loads in commercial buildings according to claim 1, characterized in that, The specific steps for adding, removing, or maintaining heat pump units based on their matching status include: When the secondary network return water temperature is lower than the set value of the heat pump unit temperature or the load rate of the heat pump unit is higher than the set value of the heat pump unit load rate, and the number of currently running heat pump units is less than the maximum number of available units, the heat pump unit addition operation is triggered, and a new heat pump unit and its corresponding circulating water pump and electric valve are started in a preset sequence. When the secondary network return water temperature is higher than the reduced heat pump temperature setting value and the heat pump unit load rate is lower than the reduced heat pump load rate setting value, and the number of currently operating heat pump units is greater than or equal to one, the reduced heat pump operation is triggered. One operating heat pump unit and its auxiliary equipment are stopped in a preset sequence, and the number of operating heat pump units is dynamically adjusted to match the total output of the heat pump system with the demand heat load, and to maintain the operation of each heat pump unit within the safe operating load range.

4. The method for refined geothermal control of critical loads in commercial buildings according to claim 3, characterized in that, The preset sequence of adding and removing machines includes the logic for starting and stopping the equipment and the control of the interval time. The sequence of adding the unit is as follows: First, open the electric valve of the heat pump unit corresponding to the target heat pump unit. After receiving the feedback signal that the valve is fully open, start the evaporator and condenser circulating water pumps corresponding to the target heat pump unit. After a first preset time delay, start the target heat pump unit. The sequence of the heat pump unit reduction operation is as follows: First, stop the target heat pump unit. After a second preset time delay, stop the corresponding evaporator and condenser circulating water pumps. After a third preset time delay, finally close the electric valve of the heat pump unit corresponding to the target heat pump unit.

5. The method for refined geothermal control of critical loads in commercial buildings according to claim 1, characterized in that, It also includes protective temperature control steps for the intermediate water: Real-time monitoring of the intermediate water temperature on the evaporator side of the heat pump unit; When the intermediate water temperature reaches the preset high limit, close the electric valve on the primary side of the geothermal secondary plate heat exchanger and simultaneously fully open the electric valve on the bypass side of the geothermal secondary plate heat exchanger to cut off the geothermal water flow through the geothermal secondary plate heat exchanger, thereby lowering the intermediate water temperature. When the intermediate water temperature drops to the preset lower limit, the electric valve on the primary side of the geothermal secondary plate heat exchanger is opened and the bypass electric valve of the geothermal secondary plate heat exchanger is closed at the same time to restore heat exchange in the geothermal secondary plate heat exchanger, so that the intermediate water temperature rises and is stabilized within the allowable range for safe operation of the heat pump unit.

6. The method for refined geothermal control of critical loads in commercial buildings according to claim 1, characterized in that, The specific logic for controlling the intervention and withdrawal of municipal heating sources includes: The conditions for municipal heat source intervention are that the secondary network return water temperature is lower than the intervention temperature set value, the heat pump unit load rate is higher than the intervention load rate set value, and the number of currently operating heat pump units has reached the maximum available number. When the above conditions are met simultaneously, the municipal primary network electric regulating valve and the municipal plate heat exchanger circulation pump are started. The conditions for municipal heat source withdrawal are that the secondary network return water temperature is higher than the withdrawal temperature setting value, the heat pump unit load rate is lower than the withdrawal load rate setting value, and the number of currently operating heat pump units is greater than or equal to one. When the above conditions are met simultaneously, the municipal primary network electric regulating valve and the municipal plate heat exchanger circulation pump are controlled to close. The intervention and withdrawal actions of the municipal heat source are set with a minimum time interval to prevent frequent switching.

7. A geothermal precision control system for critical loads in commercial buildings, based on the geothermal precision control method for critical loads in commercial buildings according to any one of claims 1-6, characterized in that, It includes a process subsystem, a perception layer, an execution layer, and a control layer; The process subsystem includes a medium-deep geothermal extraction and reinjection subsystem, a high-temperature heat pump heating subsystem, and a municipal heat source auxiliary subsystem. The medium-deep geothermal extraction and reinjection subsystem consists of a geothermal extraction well, a reinjection well, a primary geothermal plate heat exchanger, and a secondary geothermal plate heat exchanger connected by pipelines. The high-temperature heat pump heating subsystem consists of at least two parallel water source heat pump units and corresponding circulating water pumps connected by pipelines. The municipal heat source auxiliary subsystem consists of a municipal primary heating network, a municipal plate heat exchanger, and a municipal plate heat exchanger circulating pump connected by pipelines. The sensing layer includes temperature sensors, pressure transmitters, and flow meters deployed at key nodes of each process subsystem to collect key parameters of system operation. The execution layer includes a geothermal extraction variable frequency water pump, multiple electric valve actuators, a water source heat pump unit controller, and a circulating water pump controller. The control layer is centered on a programmable logic controller (PLC). The PLC connects the sensors in the sensing layer to the controllers and actuators in the execution layer via a communication network. The PLC stores and runs the control program of the method as described in any one of claims 1 to 6 to coordinate and control the operation of the three process subsystems.

8. The geothermal precision control system for critical loads in commercial buildings according to claim 7, characterized in that, The sensors deployed in the sensing layer specifically include: geothermal reinjection temperature sensors and pressure transmitters installed on the geothermal reinjection pipeline; geothermal extraction temperature sensors, pressure transmitters, and flow meters installed on the geothermal extraction pipeline; plate heat exchanger temperature sensors installed at the inlet and outlet of the primary and secondary geothermal plate heat exchangers on both sides; heat pump temperature and pressure sensors installed at the inlet and outlet of the evaporator and condenser sides of each water source heat pump unit; secondary network return water temperature sensors installed on the secondary network return water main pipe; and municipal plate heat exchanger temperature sensors installed at the inlet and outlet of the municipal plate heat exchangers on both sides, together forming a parameter monitoring network covering the entire system.

9. The geothermal precision control system for critical loads in commercial buildings according to claim 7, characterized in that, The actuators of the multiple electric valves in the execution layer specifically include: a primary-side electric valve for the geothermal secondary plate heat exchanger installed on the primary-side inlet pipe; a bypass electric valve for the geothermal secondary plate heat exchanger installed on its bypass pipe; an electric valve for the heat pump unit installed on the evaporator-side inlet pipe of each water source heat pump unit; a municipal primary network electric regulating valve installed on the municipal primary heating network access pipe; and branch regulating valves installed on each branch pipe of the secondary network manifold. The geothermal extraction variable frequency water pump is installed in the geothermal extraction well. The water source heat pump unit controller is built into each unit. The circulating water pump controller is matched with each circulating water pump.

10. The geothermal precision control system for critical loads in commercial buildings according to claim 7, characterized in that, The programmable logic controller (PLC) of the control layer is integrated with the sensing and execution layer devices via industrial Ethernet or fieldbus to realize data acquisition and command issuance. The PLC is also connected to a human-machine interface (HMI) to display real-time system operating parameters, equipment status, alarm information, and provide a setting interface for geothermal reinjection temperature setpoints, booster / debooster temperature setpoints, and intervention / exit temperature setpoints. The PLC's internal program modularly integrates a geothermal flow control module, a heat pump collaborative control module, and a municipal heat source regulation module.

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