JPH0245094B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an apparatus for heating and cooling using a combination of solar heat and general heat sources. Conventionally, when cooling using solar heat, a solar absorption chiller and an auxiliary chiller were operated in parallel, but in parallel, the temperature of the cold water outlet from both chillers is the same. It is difficult to improve the COP (coefficient of performance) of absorption chillers that use solar heat, and solar heating uses solar heat only on sunny days when the amount of solar radiation can be secured, and on cloudy days when there is little solar radiation, it is necessary to supplement the boiler etc. The current situation is that it relies on a heat source, which has drawbacks such as high costs and being contrary to energy conservation. In consideration of the above, the present invention aims to provide a heating and cooling device that efficiently utilizes solar heat, improves the COP of the device, and leads to energy savings. The present invention performs cooling by operating the solar absorption refrigerator 4 and the heat pump 6 in series during cooling, and performs heating by using solar heat as a low-temperature side heat source of the heat pump 6 when the amount of solar radiation is low during heating. This is a heating and cooling system that uses a combination of a solar heat source and a general heat source, and is characterized by using a solar heat collector 1 as the heat collecting section, an absorption chiller 4 and a heat pump 6 as the heat source section, and as a heat storage section. A heat storage tank such as a temperature stratification type is used. Below, this device will be described in detail with reference to an embodiment shown in the drawings and Table 1 showing the operation of the piping diagram.

【table】

[Table] First, the operation of the piping during cooling in the summer is to send the cooling water cooled by the absorption cooling tower 5 to the absorption chiller 4, cool the absorption liquid so that a large amount of water vapor is absorbed, Next, the hot water collected by the solar collector 1 is sent to heat the absorption liquid that has absorbed the water vapor to separate the water vapor, the water vapor is condensed in a low-pressure condenser, and the water is converted back into water and put into the evaporator. . When the evaporator evaporates, it takes away the heat from the cold water from the cold water heat storage tank 3 and lowers the temperature.The cold water whose temperature has been lowered is then sent in series to the heat pump 6, where the temperature is further lowered and the cold water is used for cooling. It was designed to be used in When the amount of solar radiation is relatively high in winter, the hot water collected by the solar collector 1 is sent directly from the hot water storage tank 2 to the heating load 14 side for heating, and when the amount of solar radiation is relatively low in winter, the cold water is heated. The cold water from the heat storage tank 3 is sent to the evaporator E of the heat pump 6, the heat is transferred from the low temperature side to the high temperature side by the condenser C, and the resulting hot water is used for heating. As described above, the air-conditioning system using a combination of a solar heat source and a general heat source according to the present invention operates the solar heat absorption refrigerator and the heat pump in series during cooling. For example, if cold water enters an absorption chiller at 15℃ and is cooled to 10℃, and if the 10℃ cold water is further cooled to 5℃ by a heat pump, the high temperature side of the cold water will be sent to the solar absorption chiller. This makes it possible to improve the COP, which leads to energy savings. In addition, conventional solar heating uses only sunny days when the amount of solar radiation can be secured, and relies on auxiliary heat sources such as boilers on cloudy days when the amount of solar radiation is low, but this device collects low-temperature heat even on cloudy days and uses the heat pump. This enables operation and leads to energy savings. It also eliminates the need for an auxiliary heat source such as a boiler, which has the effect of reducing heating and cooling costs.

[Brief explanation of the drawing]

The drawing is a piping diagram showing an embodiment of the present invention. 1...Solar heat collector, 2...Hot water heat storage tank, 3...Cold water heat storage tank, 4...Absorption refrigerator, 6...Heat pump.

Claims (1)

[Claims] 1. During cooling, the solar heat absorption refrigerator 4 and the heat pump 6 are operated in series to perform cooling, and when the amount of solar radiation is low during heating, solar heat is used as the low temperature side heat source of the heat pump 6 for heating. A heating and cooling system that combines a solar heat source and a general heat source.