JPS6249164A - Air-conditioning heat generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat pump system exclusively for cooling/heating air conditioning and exhaust heat recovery.

Conventional Technique 1: Various methods have been proposed for conventional heat pump systems, but only the vapor compression type using fluorocarbons and the absorption type using lithium bromide and water are mainly used.

Problems that the invention aims to solveHowever, although the former is efficient,
Because the operating pressure is high, noise and vibration are high, and the piping, etc., must also be pressure resistant, so they must be made of rigid and precise construction, resulting in an expensive product. Furthermore, there are concerns about fluorocarbons destroying the ozone layer.
Regarding its use, there was a worldwide movement to reduce its use, and there were some problems inherent in its use. Also 1
As for the backside, the efficiency is not very high (the output for input crab's 11 is around 100%), and air cooling is difficult.

There were problems such as difficulty in downsizing.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention utilizes a reversible reaction of absorption and desorption of carbon dioxide gas into a liquid phase substance, and heat is applied on the absorption reaction side to the desorption reaction. It is configured so that the cold Z4 can be taken out from the side.

action The operation of the above configuration will be explained below.

Generally, in a reversible chemical reaction system, an endothermic reaction occurs at a high temperature and an exothermic reaction proceeds at a low temperature, but it is also possible to cause the opposite reaction to occur by changing the pressure of the system. In other words, in a certain system, an exothermic reaction proceeds at high temperature and high pressure, and an endothermic reaction proceeds at low temperature and pressure. The present invention utilizes such a system to form a new heat pump system, and utilizes a reversible reaction of absorption and desorption of liquid phase carbon dioxide gas as a reaction system. That is, the heat generated during the absorption reaction of carbon dioxide into the liquid phase at high temperature and high pressure is extracted as warm heat,
The heat absorbed during the desorption reaction of carbon dioxide from the liquid phase at low temperature and low pressure is extracted as cold heat.

Example A conceptual diagram of the cooling/heating heat generator according to the present invention is shown in the figure.

In the figure, 1 is the first reactor that generates cold heat due to the desorption reaction of carbon dioxide, and 2 is the second reactor that generates warm heat due to the absorption reaction. If possible, a gas transport path with a gas pump 6 installed along the way 3. Liquid transport path provided with liquid pumping machine γ 4. Pressure reducing valve,
A pressure release device 8 consisting of a cavity or the like is provided and connected by a liquid return path 5. Reference numerals 9 and 10 designate heat recovery units that perform heat exchange between both the gas transport path 3 and the liquid transport path 4 and the liquid return path 5. The arrows in the figure indicate the flow direction of reactants or reaction products.

Next, the reaction system will be explained.

The liquid phase that reacts with carbon dioxide gas should basically be determined in accordance with the target temperature level and the pressure of the system, but the following liquid phases are effective. The liquid phase is an aqueous solution of alkanolamines such as monoethanolamine, or an alkaline aqueous solution of alkali salts such as potassium carbonate, sodium hydroxide, and ammonia.

These include a weakly acidic aqueous solution such as oxalic acid, and a liquid phase containing an organic agent such as sulfuran, polyethylene glycol dimethyl ether, propylene carbonate, and methanol. Among these, examples of results when a cycle is operated using a reaction system of carbon dioxide gas and jetanolamine are shown below.

In a system consisting of carbon dioxide gas and 3.6N (normality) jetanolamine, low temperature and low pressure side: 6°C1α07ata
, high temperature and high pressure side: 50°C + 4.0 atz, the cooling output from the first reactor was approximately 300% of the shaft input of the 1 gas/liquid pumping machine. The amount of carbon dioxide gas circulated at this time was 70 N (17 m 1n ), and the amount of liquid circulated was 12 d/min.The reaction at this time is expressed by the following equation.

RNH+HO+CQ→RNH+・Heo−+ΔH where R represents (OH-CH,,-CH2)2 and 1ΔH represents the heat of reaction.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(B) Since carbon dioxide gas is used as the working gas, it has excellent thermal stability from low to high temperatures, is inexpensive, and has excellent safety even in the event of a leak.

(b) Since the operating pressure is low, there is no need for a 4-pressure structure such as piping, and the system can be constructed at low cost (j/).

(C) Since no fluorocarbons are used, there is no concern about ozone layer depletion.

(d) Since the reaction system is composed of gas and liquid fluids, it is easy to set up a cycle.

(e) Since the precipitation of solids such as crystals is difficult to occur, there is freedom in the form of heat exchange such as air cooling and water cooling, and there is also a large degree of freedom in terms of the size of the equipment, from small to large.

(The power source is electricity only and has good controllability.

[Brief explanation of the drawing]

The figure is a conceptual diagram of a cooling/heating heat generating device in one embodiment of the present invention. 1...First reactor, 2...Second reactor 13...Gas transport path, 4...Liquid transport path, 5... ...Liquid return path, 6...Gas pressure feeder, 7...Liquid pressure feeder, 8...Pressure release device.

Claims (3)

[Claims] (1) A cooling/heating heat generating device configured to utilize a reversible reaction of absorption and desorption of carbon dioxide gas into a liquid phase substance, and to extract warm heat from the absorption reaction side and extract cold heat from the desorption reaction side. (2) The cooling/heating heat generating device according to claim 1, wherein the liquid phase substance is selected from an aqueous solution, an organic agent, or a mixture of both. (3) The cooling/heating heat generating device according to claim 1, wherein the pressure on the absorption reaction side is higher than that on the desorption reaction side.