Cooling liquid heating system and method for raising temperature by using waste heat of data center

Abstract

The invention relates to the technical field of cooling liquid heating, in particular to a cooling liquid heating system and method for heating by using waste heat of a data center, and the system comprises a liquid cooling cabinet unit which is used for obtaining heat of an external data center; the engine cooling liquid pipe is used for introducing engine cooling liquid; the generator cooling liquid cylinder is used for introducing engine cooling liquid in an engine cooling liquid pipe; the temperature sensing unit is used for detecting the temperature of the liquid cooling cabinet unit, the temperature of an engine cooling liquid pipe and the temperature of a generator cooling liquid cylinder in real time; and the control unit is used for controlling the liquid cooling cabinet unit to heat the engine cooling liquid of the engine cooling liquid pipe and controlling the temperature of the liquid cooling cabinet unit and the temperature of the engine cooling liquid pipe to be maintained in a preset transmission temperature range under the condition that the temperature of the generator cooling liquid cylinder is lower than a generator threshold temperature range. Waste heat generated by equipment is fully utilized, cooling liquid is unfrozen and heated, the PUE of the data center is reduced, and the power consumption for heating the cooling liquid is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of cooling liquid heating, and in particular to a cooling liquid heating system and method for heating a cooling liquid by utilizing waste heat from a data center. Background Art

[0002] A data center is a facility that centrally stores, manages, and processes large amounts of data. Due to the large amount of electricity consumed by data center projects, large diesel generators are usually installed in the park to power the data center. Diesel generators are standardly equipped with a water jacket heater to preheat the diesel engine in winter, prevent the coolant from freezing, ensure the normal operation of the cooling system, and improve the starting performance of the engine.

[0003] The water jacket heaters currently used consume a lot of electricity. For example, the power of a 1800kw diesel generator water jacket heater is 9kw. In addition, if it is used in the northern region, the daily opening time in winter is very long, which will increase the supporting power consumption during the use of the data center. The above problems need to be solved. Summary of the invention

[0004] In order to make full use of the waste heat generated by the equipment, thaw and heat the coolant, and reduce the power consumption of cooling liquid heating, the present application provides a cooling liquid heating system and method for heating the coolant by using the waste heat of the data center, which adopts the following technical solutions:

[0005] In a first aspect, the present application provides a cooling liquid heating method using waste heat from a data center, comprising:

[0006] Liquid cooling cabinet units are used to obtain heat from external data centers and transfer the heat;

[0007] An engine coolant pipe, used to pass an engine coolant, the engine coolant changes the engine temperature in the generator, so that the engine coolant and the liquid cooling cabinet unit perform temperature transfer;

[0008] The generator coolant cylinder is used to pass the engine coolant in the engine coolant pipe so that the engine coolant increases the contact area with the engine;

[0009] a temperature sensing unit for detecting in real time the temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe, and the temperature of the generator coolant cylinder; and

[0010] A control unit is used to read the temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder measured by the temperature sensing unit, and when the temperature of the generator coolant cylinder is lower than the generator threshold temperature range, control the liquid cooling cabinet unit to heat the engine coolant in the engine coolant pipe, and control the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe to be maintained within a preset transfer temperature range.

[0011] Preferably, the control unit is also used to control the liquid cooling cabinet unit to stop heating the engine coolant in the engine coolant pipe when the temperature of the generator coolant cylinder is higher than the generator threshold temperature range, and control the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe to maintain within a preset transfer temperature range until the temperature of the generator coolant cylinder is lower than the generator threshold temperature range.

[0012] Preferably, the liquid cooling cabinet unit comprises:

[0013] Cabinet cooling liquid pipe, used to pass the cabinet cooling liquid;

[0014] The liquid cooling cabinet module is used to obtain heat from an external data center and transfer the heat to the cabinet coolant entering the liquid cooling cabinet module, so that the cabinet coolant entering the module is heated from the minimum value of the transfer temperature range to the maximum value of the transfer temperature range.

[0015] Preferably, it also includes:

[0016] The tower cooling pipe is used to introduce the tower cooling liquid to make the tower cooling liquid flow;

[0017] A closed cooling tower unit is used to store tower coolant and cool the tower coolant;

[0018] The heat exchanger is used to transfer the temperature between the cabinet cooling liquid pipe and the tower cooling pipe, and transfer the heat of the cabinet cooling liquid to the tower cooling liquid.

[0019] In a second aspect, the present application provides a cooling liquid heating system for heating a data center using waste heat, including:

[0020] Real-time detection of the temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder;

[0021] The temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder are read. When the temperature of the generator coolant cylinder is lower than the threshold temperature range of the generator, the liquid cooling cabinet unit is controlled to heat the engine coolant in the engine coolant pipe, and the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe are controlled to be maintained within a preset transfer temperature range.

[0022] Preferably, it also includes:

[0023] When the temperature of the generator coolant cylinder is higher than the generator threshold temperature range, the liquid cooling cabinet unit is controlled to stop heating the engine coolant in the engine coolant pipe, and the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe are controlled to be maintained within a preset transfer temperature range until the temperature of the generator coolant cylinder is lower than the generator threshold temperature range.

[0024] Preferably, the transfer temperature ranges from 40°C to 48°C.

[0025] Preferably, the generator threshold temperature range is 30°C to 50°C.

[0026] Preferably, it also includes:

[0027] Real-time detection of the temperature of the tower cooling pipe;

[0028] The temperature of the tower cooling pipe is read to keep the temperature of the tower coolant within the tower threshold temperature range.

[0029] Preferably, the tower threshold temperature ranges from 32°C to 37°C.

[0030] In summary, compared with the prior art, the technical solution provided by this application has at least the following beneficial effects:

[0031] The present application utilizes the heat of the data center outside the system as a heat source for heating, obtains the heat of the external data center through the liquid cooling cabinet unit, and transfers the heat to the engine coolant pipe. The generator coolant cylinder increases the contact area between the engine coolant and the engine, and heats up the engine coolant of the generator. The temperature sensing unit detects the temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder in real time, and then controls and controls through the control unit, making full use of the waste heat generated by the equipment to thaw and heat the engine coolant, effectively reducing the energy consumption of the original refrigeration system of the data center and the energy consumption of the diesel generator, thereby reducing the electricity consumption of coolant heating, and has significant advantages in energy conservation and emission reduction, reducing operating costs, and reducing PUE. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a module schematic diagram of a coolant heating system for heating a cooling liquid by utilizing waste heat from a data center as described in an embodiment of the present application.

[0033] Figure 2 It is a flow chart of a method for heating a coolant by utilizing waste heat from a data center as described in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Liquid-cooled cabinet unit; 11. Cabinet coolant pipe; 12. Liquid-cooled cabinet module; 2. Engine coolant pipe; 3. Generator coolant cylinder; 4. Tower cooling pipe; 5. Closed cooling tower unit; 6. Heat exchanger. DETAILED DESCRIPTION

[0036] The following combination Figure 1-Figure 2 The present application is described in further detail. The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to be limiting.

[0037] Reference Figure 1 The present application relates to a cooling liquid heating system for heating a data center using waste heat, which specifically includes:

[0038] Liquid cooling cabinet unit 1, used to obtain heat from an external data center and transfer the heat;

[0039] The engine coolant pipe 2 is used to pass the engine coolant, which changes the engine temperature in the generator so that the engine coolant and the liquid cooling cabinet unit 1 can transfer temperature;

[0040] The generator coolant cylinder 3 is used to pass the engine coolant in the engine coolant pipe 2 so that the contact area between the engine coolant and the engine is increased;

[0041] A temperature sensing unit, used for detecting in real time the temperature of the liquid cooling cabinet unit 1, the temperature of the engine coolant pipe 2 and the temperature of the generator coolant cylinder 3; and

[0042] The control unit is used to read the temperature of the liquid cooling cabinet unit 1, the temperature of the engine coolant pipe 2 and the temperature of the generator coolant cylinder 3 measured by the temperature sensing unit, and when the temperature of the generator coolant cylinder 3 is lower than the generator threshold temperature range, control the liquid cooling cabinet unit 1 to heat the engine coolant in the engine coolant pipe 2, and control the temperature of the liquid cooling cabinet unit 1 and the temperature of the engine coolant pipe 2 to maintain within a preset transfer temperature range.

[0043] Specifically, the coolant heating system of the present application uses an external data center as a heat source. The data center is a facility that centrally stores, manages and processes a large amount of data. It is usually composed of large servers, network equipment, storage systems, etc., and provides data storage and processing services. A lot of heat will be generated during the operation of the data center. While the liquid cooling cabinet unit 1 cools the data center, the temperature of the liquid cooling cabinet will also rise to a certain extent, which plays a role in heating the engine coolant pipe 2. The engine coolant is introduced from one end of the engine coolant pipe 2. The outlet pipe of the liquid cooling cabinet unit 1 is the heating side. This side is contacted with the side of the engine coolant pipe 2 where the engine coolant is introduced to heat up, or a direct inflow method is used to increase the temperature of the engine coolant. During this period, the temperature sensing unit detects the temperature of the liquid cooling cabinet unit 1, the temperature of the engine coolant pipe 2 and the temperature of the generator coolant cylinder 3 in real time, and the control unit controls the temperature within a suitable range. The engine coolant is then passed into the generator coolant cylinder 3. The generator coolant cylinder 3 and the engine are both part of the generator. The generator coolant cylinder 3 increases the contact area between the engine coolant and the engine, making the heating effect better. It makes full use of the waste heat generated by the equipment to thaw and heat the engine coolant, effectively reducing the energy consumption of the original refrigeration system of the data center and the energy consumption of the diesel generator, and reducing the power consumption of the coolant heating. It has significant advantages in energy conservation and emission reduction, reducing operating costs, and reducing PUE. Since the heat of the generator coolant cylinder 3 is transferred to the engine, the outlet water temperature of the generator coolant cylinder 3 is lower than the inlet water temperature, and the outflowing coolant returns to the liquid cooling cabinet unit 1, completing a cycle.

[0044] As one of the embodiments, the control unit is also used to control the liquid cooling cabinet unit 1 to stop heating the engine coolant in the engine coolant pipe 2 when the temperature of the generator coolant cylinder 3 is higher than the generator threshold temperature range, and control the temperature of the liquid cooling cabinet unit 1 and the temperature of the engine coolant pipe 2 to maintain within a preset transfer temperature range until the temperature of the generator coolant cylinder 3 is lower than the generator threshold temperature range.

[0045] Specifically, when the control unit controls the operation of the system, the temperature sensing unit obtains the temperature of the generator coolant cylinder 3 in real time, and the controller reads the temperature data to determine whether it is higher than the generator threshold temperature range. The generator threshold temperature range is the temperature range of the coolant in the water cylinder when the generator is in working condition. The water in the generator coolant cylinder 3 is kept in this temperature range so that the generator can be cooled and cooled for normal operation.

[0046] Specifically, the threshold temperature range of the generator is 30°C to 50°C. Limiting the temperature range to between 30 degrees Celsius and 50 degrees Celsius helps protect the cooling system of the generator. Within this range, the coolant can effectively absorb and dissipate heat, keeping the temperature of the generator within an appropriate range and avoiding damage caused by overheating or overcooling. Keeping the generator within an appropriate temperature range helps improve its efficiency. If the temperature of the generator is too high or too low, there is a probability that it will cause expansion or contraction of the components, affecting the normal operation and efficiency of the generator. Keeping the temperature of the generator coolant cylinder 3 within an appropriate range helps improve its operating stability. By controlling the temperature, the impact of temperature changes on the performance and stability of the generator can be reduced, maintaining its stable operation under various operating conditions.

[0047] As one of the embodiments, the liquid cooling cabinet unit 1 includes: a cabinet cooling liquid pipe 11, used to pass the cabinet cooling liquid; a liquid cooling cabinet module 12, used to obtain heat from the external data center and transfer the heat to the cabinet cooling liquid passed into the liquid cooling cabinet module 12, so that the cabinet cooling liquid passed into the temperature is increased from the minimum value of the transfer temperature range to the maximum value of the transfer temperature range.

[0048] Specifically, the cabinet cooling liquid pipe 11 is a pipeline for passing the cabinet cooling liquid, and the cabinet cooling liquid pipe 11 is set through the liquid cooling cabinet module 12. The liquid cooling cabinet module 12 is a heat dissipation module of the external data center, which is used to directly or indirectly obtain the heat of the external data center and heat the cabinet cooling liquid in the cabinet cooling liquid pipe 11 through the heat. The control unit can directly control the operating state of the liquid cooling cabinet module 12 so that the cabinet cooling liquid is kept in a suitable range.

[0049] In the embodiment of the present application, the transfer temperature range is 40°C to 48°C, and the transfer temperature range is set within the threshold temperature range of the generator. When the water temperature of the coolant water tank is lower than 30°C, it can be quickly heated to 48°C, and the temperature difference will not be too large to cause aging or damage to the internal structure of the generator. During the heating process, the temperature of the engine coolant is always maintained within the preset range, so that the engine coolant is not higher than 48°C, and a 2°C reserve range is left, so that the maximum will not exceed 50°C, thereby improving the safety of the generator.

[0050] In one implementation mode, the engine coolant pipe 2 passes the engine coolant passing through the generator coolant cylinder 3 into the end of the return side of the cabinet coolant pipe 11, and the cabinet coolant pipe 11 mixes the engine coolant with a minimum temperature of 40°C and the cabinet coolant that was originally to flow through and returns it to the liquid cooling cabinet module 12 for heating, thereby completing a closed-loop temperature regulation.

[0051] In another embodiment, the engine coolant pipe 2 is a closed loop, and the engine coolant pipe 2 and the cabinet coolant pipe 11 transfer temperature by contact, so that the return water re-introduced into the generator coolant cylinder 3 is maintained at 40°C to 48°C.

[0052] As one of the embodiments, it also includes: a tower cooling pipe 4, used to pass the tower coolant to make the tower coolant flow; a closed cooling tower unit 5, used to store the tower coolant and cool the tower coolant; a heat exchanger 6, used to transfer the temperature between the cabinet cooling liquid pipe 11 and the tower cooling pipe 4, and transfer the heat of the cabinet cooling liquid to the tower coolant.

[0053] Specifically, since the heat dissipation capacity in the cabinet cooling liquid pipe 11 is relatively weak, in order to enable the cabinet cooling liquid in the cabinet cooling liquid pipe 11 to be cooled down in time in the cabinet cooling liquid pipe 11, so as to better utilize the waste heat of the data center to heat up the engine coolant and make full use of the heat resources, a tower cooling pipe 4, a closed cooling tower unit 5 and a heat exchanger 6 are provided. The closed cooling tower unit 5 is a device for heat dissipation, which is usually used in industrial and commercial applications. Its working principle is to reduce heat through the circulation and evaporation of water. Compared with an open cooling tower, a closed cooling tower is more closed in design, and the water is not directly exposed to the atmosphere, which can reduce the evaporation loss of water and reduce the cost of water treatment and maintenance.

[0054] As one of the implementation methods, the tower threshold temperature range is 32°C to 37°C. Setting the threshold temperature range within an appropriate range helps to optimize the operating efficiency of the system. Within this temperature range, the equipment can operate at a higher efficiency, thereby improving production or work efficiency. And by controlling the temperature range, it is possible to avoid excessive operation of the equipment or excessive energy consumption, operate within an appropriate temperature range, reduce energy consumption, reduce energy waste, and thus save energy costs. The tower threshold temperature maintains the operation of the equipment within an appropriate temperature range to help improve the stability and reliability of the system. A stable temperature environment helps reduce equipment failures and damage caused by temperature changes and maintain stable operation of the system.

[0055] The tower cooling pipe 4 is fed with tower coolant, and the closed cooling tower unit 5 leads the tower coolant to the heat exchanger 6 through the tower cooling pipe 4. The cabinet coolant pipe 11 is also fed into the heat exchanger 6, so that the cabinet coolant pipe 11 and the tower cooling pipe 4 are temperature-transferred, and the heat of the cabinet coolant is transferred to the tower coolant, so that the temperature of the cabinet coolant is reduced. In this way, the waste heat of the data center is fully utilized to heat the engine coolant.

[0056] Reference Figure 2 , a cooling liquid heating method for heating a cooling liquid by utilizing waste heat from a data center is provided in an embodiment of the present application. The method is configured for use in a system and includes:

[0057] Real-time detection of the temperature of the liquid cooling cabinet unit 1, the temperature of the engine coolant pipe 2, and the temperature of the generator coolant cylinder 3;

[0058] The temperature of the liquid cooling cabinet unit 1, the temperature of the engine coolant pipe 2 and the temperature of the generator coolant cylinder 3 are read. When the temperature of the generator coolant cylinder 3 is lower than the threshold temperature range of the generator, the liquid cooling cabinet unit 1 is controlled to heat the engine coolant in the engine coolant pipe 2, and the temperature of the liquid cooling cabinet unit 1 and the temperature of the engine coolant pipe 2 are controlled to be maintained within a preset transfer temperature range.

[0059] Specifically, when the generator is working, the temperature sensing unit detects the temperature of the liquid cooling cabinet unit 1, the temperature of the engine coolant pipe 2 and the temperature of the generator coolant cylinder 3 in real time, and the control unit reads the temperature of the liquid cooling cabinet unit 1, the temperature of the engine coolant pipe 2 and the temperature of the generator coolant cylinder 3. When the temperature of the generator coolant cylinder 3 is lower than the generator threshold temperature range, the liquid cooling cabinet unit 1 is controlled to heat the engine coolant in the engine coolant pipe 2, and the generator threshold temperature range is 30°C to 50°C. The temperature of the liquid cooling cabinet unit 1 and the temperature of the engine coolant pipe 2 are controlled to be maintained within a preset transfer temperature range, and the transfer temperature range is 40°C to 48°C, thereby utilizing the waste heat of the data center to heat the engine coolant.

[0060] It also includes: when the temperature of the generator coolant cylinder 3 is higher than the generator threshold temperature range, the liquid cooling cabinet unit 1 is controlled to stop heating the engine coolant in the engine coolant pipe 2, and the temperature of the liquid cooling cabinet unit 1 and the temperature of the engine coolant pipe 2 are controlled to maintain within a preset transfer temperature range until the temperature of the generator coolant cylinder 3 is lower than the generator threshold temperature range. The temperature of each unit module is adjusted in real time to make it work within a suitable temperature range, so that the coolant is thawed and heated, and the power consumption of cooling liquid heating is reduced.

[0061] It also includes: real-time detection of the temperature of the tower cooling pipe 4; reading the temperature of the tower cooling pipe 4 to keep the temperature of the tower coolant within a tower threshold temperature range, which is 32°C to 37°C.

[0062] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described device and product can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0063] In several embodiments provided in this application, it should be understood that the disclosed methods, systems, devices and program products may be implemented in other ways.

[0064] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0065] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cooling liquid heating system utilizing waste heat from a data center for heating, characterized in that: include: Liquid cooling cabinet units are used to obtain heat from external data centers and transfer the heat; An engine coolant pipe, used to pass an engine coolant, the engine coolant changes the engine temperature in the generator, so that the engine coolant and the liquid cooling cabinet unit perform temperature transfer; The generator coolant cylinder is used to pass the engine coolant in the engine coolant pipe so that the engine coolant increases the contact area with the engine; A temperature sensing unit, used to detect in real time the temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder; and A control unit is used to read the temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder measured by the temperature sensing unit, and when the temperature of the generator coolant cylinder is lower than the generator threshold temperature range, control the liquid cooling cabinet unit to heat the engine coolant in the engine coolant pipe, and control the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe to be maintained within a preset transfer temperature range.

2. The coolant heating system for heating the data center by utilizing waste heat according to claim 1 is characterized in that: The control unit is further configured to control the liquid cooling cabinet unit to stop heating the engine coolant in the engine coolant pipe when the temperature of the generator coolant cylinder is higher than a generator threshold temperature range, and to control the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe to be maintained within a preset transfer temperature range until the temperature of the generator coolant cylinder is lower than the generator threshold temperature range.

3. The coolant heating system for heating the data center by utilizing waste heat according to claim 1 is characterized in that: The liquid cooling cabinet unit comprises: Cabinet cooling liquid pipe, used to pass the cabinet cooling liquid; The liquid cooling cabinet module is used to obtain heat from an external data center and transfer the heat to the cabinet coolant entering the liquid cooling cabinet module, so that the cabinet coolant entering the module is heated from the minimum value of the transfer temperature range to the maximum value of the transfer temperature range.

4. The coolant heating system for heating the data center by utilizing waste heat according to claim 3 is characterized in that: Also includes: The tower cooling pipe is used to introduce the tower cooling liquid to make the tower cooling liquid flow; A closed cooling tower unit is used to store tower coolant and cool the tower coolant; The heat exchanger is used to transfer the temperature between the cabinet cooling liquid pipe and the tower cooling pipe, and transfer the heat of the cabinet cooling liquid to the tower cooling liquid.

5. A method for heating a coolant by utilizing waste heat from a data center, characterized in that: include: Real-time detection of the temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder; The temperature of the liquid cooling cabinet unit, the temperature of the engine coolant pipe and the temperature of the generator coolant cylinder are read. When the temperature of the generator coolant cylinder is lower than the threshold temperature range of the generator, the liquid cooling cabinet unit is controlled to heat the engine coolant in the engine coolant pipe, and the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe are controlled to be maintained within a preset transfer temperature range.

6. The method for heating coolant by utilizing waste heat of a data center according to claim 5, characterized in that: Also includes: When the temperature of the generator coolant cylinder is higher than the generator threshold temperature range, the liquid cooling cabinet unit is controlled to stop heating the engine coolant in the engine coolant pipe, and the temperature of the liquid cooling cabinet unit and the temperature of the engine coolant pipe are controlled to be maintained within a preset transfer temperature range until the temperature of the generator coolant cylinder is lower than the generator threshold temperature range.

7. The method for heating coolant by utilizing waste heat of a data center according to claim 5, characterized in that: The transfer temperature range is 40°C to 48°C.

8. The method for heating coolant by utilizing waste heat of a data center according to claim 5, characterized in that: The generator threshold temperature ranges from 30°C to 50°C.

9. The method for heating coolant by utilizing waste heat of a data center according to claim 5, characterized in that: Also includes: Real-time detection of the temperature of the tower cooling pipe; The temperature of the tower cooling pipe is read to keep the temperature of the tower coolant within the tower threshold temperature range.

10. The method for heating coolant by utilizing waste heat of a data center according to claim 9, characterized in that: The tower threshold temperature range is 32°C to 37°C.

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