JP2007093158A - Air conditioning system with large temperature difference water heating source - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce installation cost for air conditioning and operation cost for a heat source equipment. <P>SOLUTION: This air conditioning system with a large temperature difference water heating source comprises the heating source machine 1, and a heating source water circuit 2 in which heating source water temperature-controlled by the heating source machine 1 flows. The heating source water circuit 2 has a first water channel 7 to which one or more cold/hot water coil type air-conditioner 4 is connected, a second water channel 8 to which one or more water-cooled heat pump type air-conditioner 5 is connected, and a third water channel to which one or more water-cooled heat pump type air-conditioner 5 is connected. The first water channel 7 and the third water channel 9 are arranged on the upstream side of the heating source water circuit 2 and on the downstream side thereof, respectively. The exit of the first water channel 7 is connected to the inlet of the second water channel 8 and to the inlet of the third water channel 9 in a branching manner. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a large temperature difference water heat source air conditioning system.

  In an air conditioning system in which a water source water circuit in which the heat source water whose temperature is adjusted by the heat source device flows is divided into multiple channels and a cold / hot water coil type air conditioner is connected to each water channel, the heat source water flows in parallel to each water channel. Yes.

Japanese Patent Laid-Open No. 10-232000

  For this reason, a large amount of heat source water is required, the pipe diameter and pump capacity of the heat source unit and the heat source water circuit are large, and there is a problem that the operating cost of the equipment and the heat source unit becomes high.

  In order to solve the above-mentioned problems, the present invention includes a heat source unit and a heat source water circuit through which heat source water whose temperature is adjusted by the heat source unit flows, and the heat source water circuit includes one or a plurality of cold / hot water coil types. A first water channel connected to an air conditioner, a second water channel connected to one or more water-cooled heat pump air conditioners, and a third water channel connected to one or more water-cooled heat pump air conditioners; The first water channel is arranged upstream of the heat source water circuit, the second water channel and the third water channel are arranged downstream, and the outlet of the first water channel is connected to the second water channel. The main feature is that it is branched and connected to the inlet and the inlet of the third water channel.

According to the invention of claim 1, since the heat source water is made to flow by connecting the outlet of the first water channel to the inlet of the second water channel and the inlet of the third water channel, compared with the case where the heat source water is made to flow in parallel to the three water channels. Therefore, the amount of water can be reduced to 1/3, and the pipe diameter and pump capacity of the heat source device and the heat source water circuit can be reduced, so that the operating cost of the equipment and the heat source device can be reduced.
According to invention of Claim 2, since the water temperature difference of the entrance / exit of a heat source water circuit is 15 degreeC-30 degreeC, the operating efficiency of a heat source machine is good, a load does not become large too much, and becomes energy saving.

  1 to 3 show, in a simplified diagram, an embodiment of a large temperature difference water heat source air conditioning system according to the present invention. This large temperature difference water heat source air conditioning system includes a heat source unit 1 and a temperature of the heat source unit 1. A heat source water circuit 2 through which the adjusted heat source water flows and a water feed pump 3 that sends the heat source water in the direction of the arrow are provided. The heat source unit 1 is configured so that the heat source water can be switched between hot water and cold water by a boiler for hot water, a cooling tower or chiller for cold water, and a switching mechanism (not shown). The heat source water circuit 2 includes a first water channel 7 to which one or a plurality of cold / hot water coil air conditioners 4 are connected, and a second water channel 8 to which one or a plurality of water-cooled heat pump air conditioners 5 are connected. A third water passage 9 to which one or a plurality of water-cooled heat pump air conditioners 5 are connected, the first water passage 7 upstream of the heat source water circuit 2, the second water passage 8 and the second water passage downstream. The three water channels 9 are respectively arranged, and the outlet of the first water channel 7 is branched and connected to the inlet of the second water channel 8 and the inlet of the third water channel 9, and the water amount of the second water channel 8 with respect to the water amount of the first water channel 7. Is set to 1/2, the amount of water in the third water channel 9 is also set to 1/2, and the water temperature difference at the inlet / outlet of the heat source water circuit 2 is set to 15 ° C to 30 ° C.

  The cold / hot water coil type air conditioner 4 includes a cold / hot water coil 10 through which heat source water is passed and an air supply blower in the casing, and the cold / hot water coil 10 cools or heats the air-conditioning air. The cooling operation and the heating operation can be switched freely, and air is supplied to the air-conditioned space for air conditioning. Various types such as an air handling unit and a fan coil unit are applied to the cold / hot water coil type air conditioner 4.

  The water-cooled heat pump type air conditioner 5 includes a water-cooled heat pump 11 and an air supply blower in a casing. The water-cooled heat pump 11 repeats the steps of evaporation, compression, condensation, and expansion for the circulating refrigerant, and dissipates heat in the refrigerant condensing step for heat and water that is exchanged with the circulating refrigerant in the refrigerant condensing step. The air heat exchanger 13 and the water heat exchanger 12 through which the heat source water is passed, the compressor 14 for compressing the circulating refrigerant, And a decompression mechanism such as an expansion valve for expanding the circulating refrigerant, and a switching mechanism such as a valve for switching between the evaporation process and the condensation process of the air heat exchanger 13 and the water heat exchanger 12, and the refrigerant circulates through them. It is made by connecting pipes as follows. The air heat exchanger 13 of the water-cooled heat pump 11 cools or heats the air-conditioning air so that the air-cooling operation and the heating operation can be switched, and the air-conditioned space is supplied and air-conditioned.

  In this air conditioning system, when cooling operation is performed with all air conditioners, for example, by flowing cold water of 7 ° C. as the heat source water, the heat source water is, for example, supplied by the cold / hot water coil 10 of the cold / hot water coil type air conditioner 4 in the first water channel 7. The temperature rises from 7 ° C to 12 ° C (water temperature difference 5 ° C). At this time, since the amount of water in the second water channel 8 is ½ and the amount of water in the third water channel 9 is also ½ with respect to the amount of water in the first water channel 7, the first water channel 7, the second water channel 8, and the When the three water channels 9 require the same amount of heat, the water temperature difference in the second water channel 8 is doubled and the water temperature difference in the third water channel 9 is also doubled with respect to the water temperature difference in the first water channel 7. In the water channel 8 and the third water channel 9, the heat source water rises in temperature from, for example, 12 ° C. to 22 ° C. (water temperature difference 10 ° C.) by the water heat exchanger 12 of the water-cooled heat pump air conditioner 5, and the water temperature difference at the entrance / exit of the heat source water circuit 2 Becomes 15 ° C. The temperature of the heat source water returned to the heat source unit 1 is adjusted and circulates in the heat source water circuit 2.

  Similarly, when heating operation is performed, for example, hot water of 45 ° C. is flowed as heat source water. The temperature of the heat source water drops from 40 ° C. to 30 ° C., for example, by a water heat exchanger 12 of the water-cooled heat pump type air conditioner 5 in the second water channel 8 and the third water channel 9 (water temperature difference 10 ° C.). Then, the water temperature difference at the entrance and exit of the heat source water circuit 2 is 15 ° C. Although the increase / decrease and setting change of the water temperature difference of the entrance / exit of this heat source water circuit 2 are free (for example, 40 degrees C or less), 15 to 30 degreeC is preferable from the surface of the operation efficiency of the heat source apparatus 1.

  In addition, in the said Example, increase / decrease in the number of the water cooling heat pump type air conditioners 5 and the cold / hot water coil type air conditioners 4 is free, and the water cooling heat pump type air conditioner 5 is provided in all the water channels, or the air conditioner provided for every water channel You can also change the type. The inside of the first water channel 7, the second water channel 8, and the third water channel 9 can be freely changed to various methods such as a direct return method, a reverse return method, and a combination thereof.

1 is an overall simplified explanatory diagram of a large temperature difference water heat source air conditioning system. It is a simple explanatory view of a cold / hot water coil type air conditioner. It is a simple explanatory view of a water cooling heat pump type air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat source machine 2 Heat source water circuit 4 Cold / hot water coil type air conditioner 5 Water cooling heat pump type air conditioner 7 1st water channel 8 2nd water channel 9 3rd water channel

Claims (2)

  The heat source device 1 and a heat source water circuit 2 through which the heat source water adjusted in temperature by the heat source device 1 flows, and the heat source water circuit 2 is connected to one or a plurality of cold / hot water coil air conditioners 4. The first water channel 7, the second water channel 8 to which one or more water-cooled heat pump air conditioners 5 are connected, and the third water channel 9 to which one or more water-cooled heat pump air conditioners 5 are connected. The first water channel 7 is disposed on the upstream side of the heat source water circuit 2, the second water channel 8 and the third water channel 9 are disposed on the downstream side, and the outlet of the first water channel 7 is provided. A large temperature difference water heat source air-conditioning system, wherein the inlet of the second water channel 8 and the inlet of the third water channel 9 are branched and connected.   The large temperature difference water heat source air conditioning system according to claim 1, wherein the water temperature difference at the entrance and exit of the heat source water circuit 2 is 10 ° C to 30 ° C.

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