JPH04270870A - Absorption type refrigerating device utilizing waste heat - Google Patents

Abstract

PURPOSE:To simplify the complicated pipeline system by a method wherein a hotwater pump, a cooling water pump and a cold water pump are arranged on one set of trestle in the up-and-down direction thereof, in an absorption, type refrigerating device including an absorption type refrigerating machine utilizing the waste heat of an engine as the heating source therefor. CONSTITUTION:Hot-water, heated by an engine 1 in an engine unit, is introduced into the reproducer 2 of a refrigerating machine unit to effect heat exchange between refrigerant solution and, thereafter, is circulated to the engine by a pump 8. Cooling water, cooled in a cooling tower 6, is circulated into the cooling tower 6 through an absorber 5 and a condenser 3 by a pump 10. Cold water, cooled in an evaporator 4, is sent to a cold water load 7 by another pump 9 to use it for room cooling and, thereafter, is recirculated into the evaporator 4. In this case, the hot-water pump 8, the cooling water pump 10 and the cold water pump 9 are installed together on one set of trestle to settle respective pipeline systems by this method. Upon installing the absorption type refrigerating device, respective units are transported to the site of installation and piping, connecting them to each other, is effected at site.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an absorption refrigeration system,
In particular, it relates to an exhaust heat absorption refrigeration system that operates using exhaust heat from an engine (prime mover) as a heat source.

0002

[Prior Art] Conventionally, in an exhaust heat absorption refrigeration system that uses engine exhaust heat, heat is exchanged between the engine (prime mover), absorption chiller, cooling tower, and load side. , cooling water, cold water, etc., generally use water as the heat medium. In this case, as shown in the circuit diagram of FIG. 1, each device has a large number of piping, making it complicated. These constructions are time-consuming and require a large amount of installation space. One of the reasons why absorption refrigeration equipment (cogeneration systems) that utilize engine exhaust heat has not become widespread is due to the difficulty in designing and constructing these piping systems.

0003

[Problems to be Solved by the Invention] In order to solve the above-mentioned difficulties in piping, the present invention provides an absorption refrigeration system that utilizes exhaust heat and installs equipment such as pumps and valves in the piping system together. The purpose is to provide equipment.

0004

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an absorption refrigerator that uses exhaust heat from an engine as a heating source, a cooling tower that releases the heat of the absorption refrigerator, and an exhaust gas of the engine. Main types include hot water pumps that transfer heat in the form of hot water, cooling water pumps that transfer heat in the form of cooling water between absorption chillers and cooling towers, and cold water pumps that transfer the cooling capacity of chillers in the form of cold water. In an absorption refrigeration system in which the components are connected by piping, the hot water pump, the cooling water pump, and the cold water pump are arranged in a vertical direction on one frame. This is an absorption refrigeration system. In the above-mentioned absorption refrigeration apparatus, a cooling heat exchanger may be further provided to radiate heat when engine exhaust heat is excessive, and the heat exchanger may be installed and disposed in the mount section.

[0005] Further, the pedestal section is provided with a pump control panel for controlling the operation stoppage of the hot water pump, cooling water pump, and cold water pump, as well as piping, valves, etc. necessary for the hot water system, cooling water system, and cold water system. It is best to incorporate an expansion tank and provide heat insulation, cold insulation, and electrical wiring to form a single unit around the frame. In this case, if a cooling heat exchanger is installed, the control panel that controls the hot water temperature of the heat exchanger is also
It is best to install them on the same pedestal. The expansion tank may serve both as a hot water system and a cold water system. The cooling water system is usually
Since there is a cooling tower open to the atmosphere, this tank is not necessary. This is necessary because the cold water system and hot water system are generally sealed, and if there is no pressure problem, a single expansion tank can serve both purposes. If the cooling tower is hermetically sealed, it can also be used as a cooling water system.

[0006]

[Function] With the above-described configuration, the present invention allows the main water piping and pumps, as well as the cooling heat exchanger, to be assembled into a single unit on a frame, eliminating the need for piping design corresponding to the actual item. At the site, only simple piping work is required, and the pedestal is raised vertically, and the pump and heat exchanger are placed inside it, reducing the installation space. In addition, pumps, heat exchanger control panels, expansion tanks, air vents,
On-site construction can be further simplified by draining the drain, attaching the necessary valves to the pedestal, and providing the necessary heat insulation, cold insulation, piping, etc.

[0007]

EXAMPLES The present invention will be specifically explained below with reference to the drawings, but the present invention is not limited to these examples. Example 1 FIG. 1 is a circuit diagram showing a piping system of an absorption refrigeration apparatus of the present invention. In FIG. 1, the absorption refrigeration system includes an engine unit, a pump unit, a refrigerator unit, a cooling tower unit, and a chilled water load. Hot water heated by the engine 1 of the engine unit passes through a pipe 14 and is introduced into the regenerator 2 of the refrigerator unit, where it exchanges heat with a refrigerant solution, and then passes through a pipe 15 and is circulated to the engine 1 by a pump 18. Take. The cooling water cooled by the cooling tower 6 is transferred to the pipe 18
A cycle is taken in which the air is circulated by the pump 10 through the absorber 5 and condenser 3 of the refrigerator unit, and then from the pipe 19 to the cooling tower 6. In addition, the cold water cooled by the evaporator 4 of the refrigerator unit passes through the pipe 17 with the pump 9, reaches the cold water load 7, is provided for cooling, and then circulates through the pipe 16 to the evaporator 4, forming a cycle. .

In this way, each unit is connected with piping for hot water, cooling water, and cold water, and in the present invention, a pump unit is provided, and the hot water pump 8, the cooling water pump 10, and the cold water pump 9 are connected together. They are installed together on one pedestal, and each piping system is organized. When installing this absorption refrigeration system, it is only necessary to transport each unit to the site and install only the portion shown by the broken line in FIG. 1 at the site. Figure 2 shows the layout of each unit. In FIG. 2, the piping is simplified because it is only necessary to connect the pump unit and each unit like A, B, C, and D. The pump unit also incorporates an expansion tank 11 and a power panel (control panel) 12. Figures 3 and 4 show structural diagrams of the pump unit. FIG. 3 is a side view of the pump unit, and FIG. 4 is a front view thereof. Each symbol represents the same meaning as in FIG. As shown in FIGS. 3 and 4, each pump is installed on a pedestal 22, and an expansion tank 11 is provided at the top of the pedestal.
A control panel is also provided on the side. If necessary, this pump unit can also be equipped with additional valves for heat retention,
You may apply makeup to keep it cool, or you may cover it with the unit cover 23 and omit makeup to keep it warm or cold.

Embodiment 2 In this embodiment, a cooling heat exchanger is provided to radiate heat when engine exhaust heat is excessive. FIG. 5 is a circuit diagram showing an example piping system provided with a cooling heat exchanger. In FIG. 5, each reference numeral is the same as in FIG. 1, and the difference from FIG. The temperature of the hot water is detected by a detector 28 through the piping 25, and by operating the valve 27, the coolant flows into the cooling heat exchanger 24, thereby cooling the hot water circulating to the engine. . The cooling water that has cooled the hot water is joined from the pipe 26 to the circulating cooling water piping 19 leading to the cooling tower, and is introduced into the cooling tower.

The cooling heat exchanger 24, valve 27, etc. described above are installed in the pump unit. A structural diagram of the pump unit is shown in Figure 6. Figure 6 is Figure 3 of Example 1.
FIG. 2 is a side view of a pump unit corresponding to FIG. In this way, the complex piping system equipped with the cooling heat exchanger is also built into the pump unit and installed, and assembly can be completed on site by simply connecting each piping system, as in Example 1. , construction is greatly simplified.

[0011]

According to the present invention, as described above, by arranging pumps all together on one pedestal, a complicated piping system can be simplified. Furthermore, by incorporating a cooling heat exchanger, valves, and expansion tank into the frame to form a single unit, on-site construction can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a piping system of an absorption refrigeration apparatus of the present invention.

FIG. 2 is a layout diagram of each unit.

FIG. 3 is a side view showing the structure of the pump unit.

FIG. 4 is a front view showing the structure of the pump unit.

FIG. 5 is a circuit diagram showing another piping system of the absorption refrigeration apparatus of the present invention.

FIG. 6 is a side view showing the structure of the pump unit in the circuit diagram of FIG. 5;

[Explanation of symbols]

1: Engine, 2: Regenerator, 3: Condenser, 4: Evaporator,
5: Absorber, 6: Cooling tower, 7: Cold water load, 8: Hot water pump, 9: Cold water pump, 10: Cooling water pump, 11: Expansion tank, 12: Control panel, 13: Operation panel, 14-21: Piping, 22: Frame, 23: Unit cover, 24: Cooling heat exchanger, 27: Valve, 28: Temperature detector

Claims (5)

[Claims] Claim 1: An absorption refrigerator that uses exhaust heat from an engine as a heating source, a cooling tower that releases the heat of the absorption refrigerator, a hot water pump that transfers the exhaust heat of the engine in the form of hot water, an absorption refrigerator and cooling. In absorption refrigeration equipment, the main components are a cooling water pump that transfers heat to and from the tower in the form of cooling water, and a chilled water pump that transfers the refrigeration capacity of the refrigerator in the form of chilled water, and each device is connected by piping. An absorption refrigeration system utilizing waste heat, characterized in that the hot water pump, the cooling water pump, and the cold water pump are arranged in a vertical direction on one frame. 2. The absorption refrigerating device further includes a cooling heat exchanger that radiates heat when engine exhaust heat is excessive,
2. The exhaust heat absorption refrigeration system according to claim 1, wherein the heat exchanger is installed and disposed in the pedestal. 3. The frame section is provided with a pump control panel for controlling the operation stoppage of the hot water pump, cooling water pump, and cold water pump, as well as piping and valves necessary for the hot water system, cooling water system, and cold water system. 2. The exhaust heat absorption refrigeration system according to claim 1, further comprising an expansion tank and the like, and is provided with heat insulation, cold insulation, and electrical wiring to form a single unit around the frame. 4. The frame section is provided with a pump control panel for controlling the operation stoppage of the hot water pump, the cooling water pump, and the cold water pump, and a control panel for controlling the hot water temperature of the cooling heat exchanger. Claim 2, characterized in that the frame and its surroundings are integrated into one unit by incorporating piping, valves, and expansion tanks necessary for the system, cooling water system, and cold water system, and providing heat insulation, cold insulation, and electrical wiring. The described exhaust heat utilization absorption refrigeration device. 5. The exhaust heat absorption absorption refrigerating apparatus according to claim 3, wherein the expansion tank serves as both a hot water system and a cold water system.