JPS61244229A - Dual-purpose internal combustion electricity/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 [Technical Field of the Invention] The present invention relates to a cogeneration internal combustion power generation device installed as a heat source and power source for air conditioning equipment.

[Technical Background of the Invention and its Problems] Generally, hotels, hospitals, buildings, factories, etc. are equipped with air conditioners for heating and cooling the rooms. The heat source and power source of this air 11 device are usually obtained from a commercial power source, but in recent years, for the purpose of energy saving, the heat source and power source are sometimes obtained from a cogeneration internal combustion power generation facility. This internal combustion power generation equipment is configured so that an internal combustion engine drives a generator to supply electric power from the generator and exhaust heat energy from the internal combustion engine to an air conditioner.

By the way, even though internal combustion engines, especially gas turbines, emit much more waste heat energy than the energy they lend to drive the load, conventional internal combustion power generation equipment does not rely on the power of air conditioners. Emphasis is placed on controlling the most efficient power supply from the generator according to demand, and the waste heat energy emitted from the internal combustion engine is not fully utilized.

[Object of the Invention] An object of the present invention is to provide a cogeneration internal combustion power generation device that increases the utilization of exhaust heat energy of an internal combustion engine and saves energy.

[Summary of the Invention] The cogeneration internal combustion power generation device according to the present invention detects the temperature difference between the actual temperature in a room being air-conditioned by an air conditioner and a set temperature, and calculates the amount of heat to be supplied to the air conditioning equipment from that temperature difference. Furthermore, the calorific value of the calculation result and the pre-stored heat generation
! A desired generator output is determined from the relationship between the i-engine output and the exhaust heat amount of the internal combustion engine, and the power load amount of the generator is controlled so that the output of the generator becomes the determined desired generator output. This is what I did.

[Embodiment 1 of the Invention Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is an internal combustion engine that drives a generator 2, 3 is a heat exchanger that heats a fluid using waste heat energy discharged from the internal combustion engine 1, and 4 is a heat exchanger that heats a fluid by the heat exchanger 3. a motor 4 that transports the fluid to the radiator 5a of the air conditioning equipment 5;
' is driven by a pump, and 6 is a power load such as an air conditioner 5, and this power load 6 is driven by a changeover switch 7 provided for each.
It is now possible to select whether power is supplied from the generator 2 or from the commercial power source 8.

Reference numeral 9 denotes an air conditioning load detector that detects the temperature difference between the actual temperature inside the T that is air conditioned by the air conditioner 5 and the set value. The amount of heat is calculated, and the desired generator output is determined from the relationship between the calculation result and the pre-stored generator output as shown in FIG. 2 and the amount of heat discharged from the internal heat engine. This is a power load control device that switches the changeover switch 7 provided in each power load 6 to the commercial power supply side or the generator side so that the desired output IRa is obtained. Here, when controlling the changeover switch 7 by the power load control device v110, it is also possible to assign priorities and control based on these priorities. It should be noted that the above-mentioned control can be easily performed by constructing the power load control device using a microcomputer.

Next, control of the cogeneration internal combustion power generation facility configured as described above will be explained. First, if the indoor temperature is lower than the set temperature,
The temperature difference is detected by the air conditioning load detector 9, and a signal corresponding to the temperature difference is sent to the power load control device i10.

Based on the signal, the power load control device 10 controls the heat exchanger 3
However, the amount of heat of the fluid supplied to the air conditioning equipment 5, that is, the extent to which the exhaust heat energy of the internal combustion engine 1 is insufficient is calculated. This calculation is performed in consideration of various conditions such as the size of the room air-conditioned by the air conditioning equipment 5 or the heat dissipation capacity of the air conditioning equipment 5.

Then, from this calculation result and the relationship between the generator output and the exhaust heat amount of the internal heat engine as shown in FIG. The changeover switch 7 provided on each power load 6 is switched to the generator side so that the desired generator output is obtained.

When one or more electric power loads 6 are input to the generator 2 in this way, the load on the internal combustion engine 1 increases, and the internal combustion engine 13Q
The waste heat energy emitted from 1 increases. As the exhaust heat energy increases, the temperature of the fluid heat exchanged by the heat exchanger 3 increases, and the temperature in the room air-conditioned by the air conditioner 5 approaches the set value.

Next, when the indoor temperature is higher than the set temperature, the power load control device 10 switches the changeover switch 7 to the commercial power source side, and the output of the generator is reduced. In this way, when the electric power load input to the generator 2 is reduced, the load on the internal combustion engine 1 is reduced, and the exhaust heat energy discharged from the internal combustion engine 1 is reduced. When the exhaust heat energy decreases, the temperature of the fluid heat exchanged by the heat exchanger 3 decreases, and the air conditioning vR1i! 5, the temperature of the blank air-conditioned space approaches the set value.

[Effects of the Invention] As described above, according to the combined heat generation internal combustion power generation [i] of the present invention, the electric power load m of the generator is adjusted depending on the air conditioning condition of the room air-conditioned by the air conditioner, and the internal combustion power l! Since the exhaust heat energy of lll1 is increased or decreased and the amount of heat of the air conditioner is controlled, the utilization of the exhaust heat energy of the internal combustion engine is increased and energy saving is achieved.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of a cogeneration internal combustion power generation apparatus according to the present invention, and FIG. 2 is a characteristic diagram showing the relationship between power generation output and exhaust heat amount. 1... Internal combustion engine, 2... Generator 3... Heat exchanger, 5... Air conditioner 6... Electric power load,
7... Selector switch 8... Commercial power supply,
9...Air conditioning load detector 10...Power load control device (8733) Agent Patent attorney Yoshiaki Inomata (and 1 others)
Figure 2

Claims (1)

[Claims] A generator driven by an internal combustion engine, an air conditioner that uses exhaust heat energy of the internal combustion engine as a heat source, and a temperature difference between an actual temperature and a set temperature in a room air-conditioned by the air conditioner. An air conditioning load detector calculates the amount of heat to be supplied to the air conditioner from the temperature difference detected by the air conditioning load detector, and the relationship between the calculation result and the pre-stored generator output and the amount of exhaust heat from the internal combustion engine. A cogeneration internal combustion power generation system comprising: a power load control device that determines a desired generator output from the generator and controls the power load amount of the generator so that the output of the generator becomes the determined desired generator output.