CN201000129Y - A radiant cooling and heating system - Google Patents

Abstract

A radiant heating and cooling system. The system consists of solar collectors, external hot water storage tanks, external circulating water pumps, water-water heat exchangers, gas collection tanks, internal circulating water pumps, water distributors, water collectors, water supply pipes, return pipes, and radiant coils and so on. The utility model flexibly combines traditional cold and heat sources such as hot and cold water units and boilers with the end of the indoor radiant coil through the heat exchange unit, which not only realizes the comfort of indoor cooling and heating, but also makes full use of the traditional cold and heat sources. Instead of being idle and wasted. At the same time, the utility model adopts the solar heat collecting loop to preheat the circulating water, so that the heating system in the whole heating season can be more energy-saving.

Description

A radiant cooling and heating system

technical field

The utility model relates to a radiation cooling and heating system, in particular to a radiation cooling and heating system using a heat exchange unit as a terminal water supply temperature conversion device.

Background technique

In recent years, with the continuous improvement of people's living standards, people's requirements for the comfort of the indoor living environment are increasing; the increasing global energy crisis has made "energy saving" a common concern around the world. As a result, the terminal device of the radiant cooling and heating system with comfort and energy saving came into being, and gradually spread to all large, medium and small buildings in China, and will gradually replace the traditional air-conditioning terminal equipment - fan coil unit, becoming a new generation of air-conditioning supply Heating and cooling terminal unit.

However, the radiant cooling and heating terminal device needs to provide low-temperature hot water < 60 ℃ in the cooling season, and high-temperature cold water > indoor air dew point temperature in the heating season; while traditional cold and heat sources such as hot and cold water units and boilers provide more It is low-temperature cold water (about 7°C) and high-temperature hot water (>60°C), which cannot meet the water supply requirements of radiant cooling and heating terminal equipment. If a set of cold and heat source system is added to the terminal equipment of radiant heating, cooling and air conditioning, the initial investment will be greatly increased, and the original large, expensive, and long-term traditional cold and heat sources have been idled and wasted, which is economical. worse.

Solar energy is an inexhaustible, inexhaustible, clean and renewable energy, and it is one of the main energy sources in the future. my country's research and development of solar energy utilization technology has been listed as a scientific and technological project, and has achieved many results. However, there is not yet a set of system design that perfectly combines solar heat collecting equipment with radiant heating and cooling devices.

Utility model content

The purpose of this utility model is to provide a heat exchange system that can convert the high-temperature hot water and low-temperature cold water provided by traditional cold and heat sources such as cold and hot water units and boilers into low-temperature hot water and high-temperature cold water that can be used by radiation heating and cooling end devices. The unit is used as the terminal water supply temperature conversion device, and uses the solar heat collection loop to preheat the terminal water supply in a radiant heating and cooling system.

In order to achieve the purpose of the utility model, such a radiation cooling and heating system is provided. The system consists of solar collectors, external hot water storage tanks, external circulating water pumps, water-water heat exchangers, gas collection tanks, internal circulating water pumps, water distributors, water collectors, water supply pipes, return pipes, and radiant coils , a regulating valve, a coiled pipe, a coiled valve, a water supply pipe, and a circulation pipeline with circulating water in it. The inlet connection end of the water-water heat exchanger of the utility model is connected in series with the right outlet of the outer hot water storage tank through a pipe section with a regulating valve, and the outlet connection end of the water-water heat exchanger is connected in series with the inlet of the inner circulating water pump in the water supply pipe on. The inlet of the gas collecting tank of the utility model is connected to the water supply pipe section connected to the outlet connection end of the water-water heat exchanger and the inlet of the inner circulating water pump. The water-water heat exchanger, the inner circulating water pump, and the gas collecting tank constitute a heat exchange unit. The outlet of the inner circulating water pump is connected to the inlet of the water separator through a pipe section with a regulating valve. The radiant coil is connected to each end of the water separator and the water collector respectively, and the outlet of the water collector is connected to the right inlet of the outer hot water storage tank. The return pipes with regulating valves are connected in series. In the utility model, the pipeline connecting the right outlet of the outer hot water storage tank with the inlet connection end of the water-water heat exchanger and the pipeline connected between the outlet of the water collector and the right inlet of the outer hot water storage tank are connected. Coiled tube with coiled valve. The inlet of the outer circulating water pump of the utility model is connected with the left outlet of the outer hot water storage tank, the outlet of the outer circulating water pump is connected with the inlet of the solar collector, and the outlet of the solar collector is connected with the left inlet of the outer hot water storage tank. Connection, the solar collector, the outer circulating water pump, the outer hot water storage tank, etc. constitute a solar heat collection loop. The water supply pipes with regulating valves are respectively arranged at the lowest position of the circulation pipeline and the lowest pipeline position of the solar heat collection loop.

Work process of the present utility model is as follows:

Summer cooling mode. First close the regulating valve on the pipe section from the right outlet of the outer hot water storage tank to the inlet connection end of the water-water heat exchanger, close the regulating valve on the pipe section from the collector outlet to the right inlet port of the outer hot water storage tank, and open the pan The disc valve on the pipe enables the inner circulating water pump and the outer circulating water pump to be turned on. The water-water heat exchanger, gas collection tank, inner circulating water pump, water heater, water collector, radiant coil, coiled pipe, coiled valve, etc. constitute a circulation loop, while the solar collector and the outer heat storage The water tank and the external circulating water pump together form a solar heat collection loop. Let the low-temperature cold water provided by traditional cold sources such as chillers enter the water-water heat exchanger through the inlet pipe interface of the water-water heat exchanger, and make the low-temperature cold water flow outside the pipe of the water-water heat exchanger, and then pass through the outlet The pipe interface flows back to the traditional cold source such as the chiller, so that the circulating water flows between the tube of the water-water heat exchanger and the radiation cooling terminal device, and finally achieves that the utility model is the same as the existing radiation cooling system. The purpose of the indoor radiant coil is to cool the room. The solar heat collection loop absorbs solar energy to heat the water in the solar heat collector, and provides domestic hot water for people through an outlet pipe with a regulating valve arranged in the outer hot water storage tank.

Winter heating mode. First, open the regulating valve on the pipe section from the right outlet of the outer hot water storage tank to the inlet connection end of the water-water heat exchange machine, open the regulating valve on the pipe section from the collector outlet to the right inlet of the outer hot water storage tank, and close the pan The disc valve on the pipe turns on the inner circulating water pump and the outer circulating water pump. Let the high-temperature hot water provided by traditional heat sources such as hot water units and boilers enter the water-water heat exchanger through the inlet pipe interface of the water-water heat exchanger, and make the high-temperature hot water flow outside the tube of the water-water heat exchanger, Then it flows back to traditional heat sources such as hot water units and boilers through the outlet pipe interface. The circulating water first passes through the solar heat collection loop, is heated by solar energy in the solar heat collector, and is stored in the outer hot water storage tank, and then enters the heat exchange unit. The inlet connection end of the water-water heat exchanger makes the circulating water circulate between the solar heat collection loop, the heat exchange unit and the radiant heating terminal device, and finally achieves that the utility model is the same as the existing radiant heating system. The purpose of the indoor radiant coil to heat the room.

The advantages of the utility model are as follows:

The utility model can not only provide heating for the room in winter, but also provide cooling for the room in summer, and utilize the temperature control strategy on the basis of the prior art to regulate and control the room temperature. In this way, a set of radiant cooling and heating systems are shared in winter and summer.

The utility model realizes the flexible and perfect connection of traditional cold and heat sources such as cold and hot water units and boilers with the end of radiation heating and cooling. The outlet water temperature of traditional cold and heat sources such as hot and cold water units and boilers is generally low-temperature cold water (about 7°C) and high-temperature hot water (>60°C), while the end of the radiant heating and cooling system needs to provide high-temperature cold water (>indoor Air dew point temperature), low temperature hot water (<60°C). The utility model converts the low-temperature cold water and high-temperature hot water provided by traditional cold and heat sources such as cold and hot water units and boilers into high-temperature cold water and low-temperature hot water that meet the water supply requirements of radiant cooling and heating terminal equipment through heat exchange units. A set of cold and heat source system for radiant cooling and heating terminal equipment can also make comprehensive utilization of expensive traditional cold and heat sources such as hot and cold water units and boilers.

Compared with the traditional air conditioner, the utility model adopts the radiant cooling and heating end device. Since most of the heat is transmitted through radiation, the indoor comfort is far superior to the traditional air conditioner mainly based on convective heat exchange.

In the heating season, the utility model adopts the solar heat collection loop, which makes full use of the renewable energy in nature - solar energy to preheat the circulating water, thereby greatly reducing the hot water in the water-water heat exchanger The water supply of traditional heat sources such as units and boilers also reduces the start-up time of traditional heat sources, reduces power consumption and primary energy consumption, and ultimately achieves the purpose of reducing energy consumption of the entire heating system.

In the cooling season, the solar heat collection loop composed of solar collectors, external hot water storage tanks, and external circulating water pumps makes full use of solar energy to provide people with domestic hot water, thereby reducing the cost of electric water heaters, gas water heaters or other forms of heating. The opening time of the water heater saves electricity consumption or other energy consumption.

Below in conjunction with accompanying drawing, the utility model is further described.

Description of drawings

Fig. 1 --- the structural representation of the utility model;

Fig. 2 --- a kind of structural representation of the water-water heat exchanger in the heat exchange unit in the utility model;

Fig. 3 --- a kind of water-water heat exchanger I-I sectional view in the heat exchange unit in the utility model;

Fig. 4 - the left side view of the water-water heat exchanger in the heat exchange unit in a kind of utility model;

Fig. 5 - a top view of the water-water heat exchanger in the heat exchange unit of the present invention;

Detailed ways

A radiant cooling and heating system (refer to Figure 1). The system consists of a solar collector 1, an outer hot water storage tank 4, an outer circulating water pump 7, a water-water heat exchanger 10, a gas collection tank 11, an inner circulating water pump 7, a water separator 13, a water collector 16, and a water supply Pipe 14, return water pipe 17, radiant coil pipe 15, regulating valve 5, coiled pipe 8, coiled valve 9, water supply pipe 3, circulation pipeline with circulating water in it, etc., is characterized in that the water-water exchange The inlet connection end 10-2 of the heater is connected in series with the right outlet of the outer hot water storage tank 4 through a pipe section with a regulating valve 5, and the outlet connection end 10-4 of the water-water heat exchanger is connected in series with the inlet of the inner circulating water pump 7. On the water supply pipe 14; the inlet of the gas collection tank 11 is connected to the pipe section connected to the outlet connection end 10-4 of the water-water heat exchanger and the inlet of the inner circulating water pump 7; the water-water heat exchanger 10, the inner circulating water pump 7, the collector The gas tank 11 and the like constitute a heat exchange unit; the outlet of the inner circulating water pump 7 is connected to the inlet of the water separator 13 through a pipe section with a regulating valve 5; One end; the outlet of the water collector 16 is connected in series with the right inlet of the outer hot water storage tank 4 through the return pipe 17 with a regulating valve 5; the right outlet of the outer hot water storage tank 4 is connected to the inlet connection end 10 of the water-water heat exchanger -2 Connected pipelines and the pipeline connected to the outlet of the water collector 17 and the right inlet of the outer hot water storage tank 4 are connected with a coiled pipe 8 with a coiled valve 9; the inlet of the outer circulating water pump 7 is connected to the outer The left outlet of the hot water storage tank 4 is connected, the outlet of the outer circulating water pump 7 is connected with the inlet of the solar collector 1, the outlet of the solar collector 1 is connected with the left inlet of the outer hot water storage tank 4, and the solar heat collection 1, the outer circulating water pump 7, the outer hot water storage tank 4, etc. constitute a solar heat collection loop; the water supply pipe 3 with the regulating valve 5 is respectively arranged at the lowest point of the circulation pipeline and the lowest pipeline of the solar heat collection loop location.

Water-water heat exchanger 10 (referring to Fig. 2,3,4,5) has inlet pipe interface 10-1 and outlet pipe interface 10-3, inlet connection end 10-2 and outlet connection end 10-4, exhaust pipe 10-7. Sewage pipe 10-6, housing 10-8, and U-shaped pipe 10-5. The two connection ends are on different sides of the water-water heat exchanger 10, and are not located on the same horizontal plane, but a Up and down, the level of the inlet connection end 10-2 is lower than the outlet connection end 10-4; the two pipe connections are respectively on different sides of the water-water heat exchanger 10, and are located on different vertical planes, one left and one right, The inlet pipe interface 10-1 is on the upper and left side of the water-water heat exchanger, and the outlet pipe interface 10-3 is on the lower and right side of the water-water heat exchanger; the inlet pipe interface 10-1 and the outlet pipe interface 10-3 They are respectively connected to the water supply and return pipes of traditional cold and heat sources such as hot and cold water units and boilers; the inlet connection end 10-3 is the inlet pipe section where circulating water enters the water-water heat exchanger 10, and the outlet connection end 10-4 is the radiant air conditioner The circulating water flows out of the outlet pipe section of the water-water heat exchanger 10 . The water-water heat exchanger 10 is a shell-and-tube heat exchanger in which a group of coils connected in series in the pipeline are installed in multiple shells; the tube side and the shell side in the water-water heat exchanger 10 , the number of tube rows and the number of tubes in each row can have various changes and combinations according to the specific heat exchange capacity requirements.

The gas collecting tank 11 is the exhaust equipment in the circulation pipeline to prevent the gas block from affecting the normal circulation of the pipeline. It can be a vertical gas collecting tank or a horizontal gas collecting tank. Trachea12. On the pipe section from the right outlet of the outer hot water storage tank 4 to the inlet connection end 10-2 of the water-water heat exchanger, the water separator 15, the water collector 18, the bottom of the outer hot water storage tank 4, and the outlet of the solar collector 1 A temperature sensor 2 is provided on the connecting pipe section to the left side inlet of the outer hot water storage tank 4 . A water outlet pipe 6 with a regulating valve 5 is arranged at the lower part of the outer hot water storage tank 4 . The water supply pipe 14 is connected to the radiant coil 15 through a water separator 13, and the radiant coil 15 is connected to the water return pipe 17 through a water collector 16; the water separator 13 and the water collector 16 each have a number The same two to six can be connected with different radiant coils 15 respectively, and all have regulating valves 5 for water diversion and water collection. That is to say, either according to conditions or according to needs, two to six groups of radiant coils 15 that are not directly connected to each other can be connected in series in the radiant heating and cooling terminal equipment; The flow rate of the circulating water in the pipe 15. The surrounding form of the radiant coil 15 can be any one adopted in the prior art.

In the cooling season operation mode, open the coil valve 10 of the coil pipe 9, close the regulating valve 5 on the return pipe section between the right inlet of the outer hot water storage tank 4 and the outlet of the water collector 16, and close the outer heat storage The regulating valve 5 on the pipe section between the outlet on the right side of the water tank 4 and the inlet connection end 10-2 of the water-water heat exchanger makes the water-water heat exchanger 10, the inner circulating water pump 7, the gas collecting tank 11, and the water separator 13. The radiant coil 15, the water collector 16, the water supply pipe 14, the water return pipe 17, the coiled pipe 8, and the coiled valve 9 are reassembled into a set of closed circulation pipelines. Wherein the closed circulation waterway is provided with a water supply pipe 3 with a regulating valve 5 leading to the lowest position of the pipeline.

In the heating season operation mode, the opening of the coil valve 10 of the coil pipe 9, the opening of the regulating valve 5 on the pipe section between the right inlet of the outer hot water storage tank 4 and the outlet of the water collector 16, and the outer hot water storage The opening degree of the regulating valve 5 on the pipe section between the outlet on the right side of the box 4 and the inlet connection end 10-2 of the water-water heat exchanger is automatically controlled by a temperature control device.

Obviously, the utility model should also have the necessary temperature regulation and control device—in view of the fact that the temperature regulation and control device can be completed by using the existing or conventional design well known to those skilled in the art in combination with the operation requirements of the utility model, And it is not the subject that the utility model needs to protect. Therefore, the introduction of the temperature adjustment and control device is omitted in this specification.

Claims (5)

1, a kind of radiation cooling heating system, this system is by solar thermal collector (1), outside heat storage water tank (4), outside water circulating pump (7), water-water heat exchanger (10), air collector (11), circulates inside water pump (7), water knockout drum (13), water collector (16), feed pipe (14), return pipe (17), radiant coil (15), control valve (5), dish siphunculus (8), the logical valve (9) of dish, filling pipe (3), the formations such as circulation line that recirculated water is arranged in it, it is characterized in that, described water-water heat exchanger inlet link (10-2) is in series by the pipeline section that has control valve (5) with the right side outlet of outside heat storage water tank (4), and water-water heat exchanger outlet link (10-4) is connected on the feed pipe (14) with circulates inside water pump (7) inlet; Described air collector (11) inlet is connected water-water heat exchanger outlet link (10-4) and circulates inside water pump (7) and enters the mouth on the feed pipe (14) that is connected; Described water-water heat exchanger (10), circulates inside water pump (7), air collector (11) etc. constitute a heat exchange unit; Described circulates inside water pump (7) outlet is connected by the water supply pipeline section that has control valve (5) with water knockout drum (13) inlet; Described radiant coil (15) is connected to each end of water knockout drum (13), water collector (16); Described water collector (16) outlet is in series by the return pipe (17) that has control valve (5) with outside heat storage water tank (4) right side inlet; Pipeline that the outlet of described outside heat storage water tank (4) right side is connected with water-water heat exchanger inlet link (10-2) and water collector (17) outlet enter the mouth with outside heat storage water tank (4) right side and are connected with the dish siphunculus (8) of the logical valve (9) of tep reel between the pipeline that is connected; Described outside water circulating pump (7) inlet is connected with the left side outlet of outside heat storage water tank (4), the outlet of outside water circulating pump (7) is connected with solar thermal collector (1) inlet, solar thermal collector (1) outlet is connected with outside heat storage water tank (4) left side inlet, and solar thermal collector (1), outside water circulating pump (7), outside heat storage water tank (4) etc. constitute a solar energy heating loop; The described filling pipe (3) that has control valve (5) is arranged in the minimum pipeline position of circulation line lowest part and solar energy heating loop.

2, radiation cooling heating system according to claim 1, it is characterized in that, described water-water heat exchanger (10) has inlet tube interface (10-2) and outlet interface (10-4), inlet link (10-2) and exports link (10-4), blast pipe (10-7), blow-off pipe (10-6), housing (10-8), U-shaped pipe (10-5), wherein two links are respectively at the heteropleural of water-water heat exchanger (10), and be not positioned on the same horizontal plane, but one on the other, inlet link (10-2) level height is lower than outlet link (10-4); Two interface tubes are respectively at the heteropleural of water-water heat exchanger (10), and be positioned on the different perpendiculars, one the first from left right side, inlet tube interface (10-2) are in water-water heat exchanger (10) top, left side, and outlet interface (10-4) is on water-water heat exchanger (10) bottom, right side.

3, radiation cooling heating system according to claim 1 is characterized in that, is furnished with bleeder pipe (12) on the described air collector (11).

4, radiation cooling heating system according to claim 1, it is characterized in that, on the connection pipeline section of the left side inlet that described outside heat storage water tank (4) right side exports on the pipeline section of water-water heat exchanger inlet link (10-2), solar thermal collector (1) exports to outside heat storage water tank (4), all be provided with temperature sensor (2) on outside heat storage water tank (4) bottom, water knockout drum (13), water collector (16).

5, radiation cooling heating system according to claim 1 is characterized in that, described outside heat storage water tank (4) lower disposed has the outlet pipe (6) of band control valve (5).

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