JP3747055B2 - Charge apportionment method for hot water storage system for apartment houses - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a charge apportioning method for a hot water storage hot water supply apparatus for an apartment house shared by a plurality of households.
[0002]
[Prior art]
Conventionally, in this type of apartment, a dedicated hot water storage hot water supply device has been installed in each household in an apartment house such as an apartment or an apartment. (For example, Patent Document 1)
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 5-5558
[Problems to be solved by the invention]
However, this conventional type requires the number of hot water storage hot water supply devices for the number of households and has the disadvantage of increasing the equipment cost. Cost can be reduced.
[0005]
However, when hot water storage type hot water supply equipment is supplied with contracted electric power by time zone, the amount of hot water required during midnight hours when the unit price of electricity is low is boiled, and the hot water supply load suddenly increases and hot water is expected to run out Is used to increase the amount of the shortage of daytime power using daytime power with a high power unit price, so the cost required to supply hot water at a constant temperature varies depending on the time of day. For this reason, it was impossible to apportion the appropriate fee individually to each household.
[0006]
[Means for solving problems]
This invention pays attention to this point, and in order to solve the above drawbacks, in particular, in the hot water storage type hot water supply apparatus that is connected to the power source of the lighting contract according to time zone, stores hot water that has been boiled and supplies hot water to a plurality of households, A hot water meter for integrating the amount of hot water used for each household provided in each of a plurality of hot water supply pipes branched from the hot water storage type hot water supply device to each household, and a plurality of water supplies branched from the hot water storage type hot water supply device to each household A water meter that integrates the amount of water used for each household installed in the piping, a total water meter that totals the amount of water used by each household, and a power that integrates the power consumption of the hot water storage hot water supply system by time zone The electricity charge of the hot water storage type hot water supply device is apportioned to each household according to the ratio of the amount of hot water used for each household, and all the water charges for each household are the sum of the amount of hot water used and the amount of water used for each household. Apportion to each household according to the ratio Those were Unishi.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a method for apportioning electric energy charges for a hot water storage hot water supply apparatus for an apartment house according to the present invention will be described. 1 is a hot water storage hot water supply apparatus installed in an apartment house 2 such as an apartment. And hot water is supplied to two households on the second floor.
[0010]
3 is a hot water meter provided in a hot water supply pipe 4 branched from the hot water storage hot water supply device 1 to each household, and 5 is a water consumption meter provided in a water supply pipe 6 branched into each household. The amount of hot water and the amount of water used are integrated. Reference numeral 7 denotes a hot and cold water mixing tap provided at an arbitrary location in each household. The user adjusts the hot water and water mixing tap 7 to a desired hot water temperature to supply hot water.
[0011]
8 is a power source serving as a power source for the hot water storage type hot water supply device 1, in order to level the power demand day and night, the power charge in the midnight time zone is low and the power charge in the daytime time zone is set high. It is a power source for a separate light contract. 9 is a power meter that integrates the power consumption of each time zone of the power supply 8 of the lamp contract according to time zone, 10 is a power unit price storage unit that stores the power unit price for each time zone, and 11 is for each time zone It is an electric energy charge calculation part which calculates the electric energy charge of electric power used from electric power consumption and an electric power unit price. Here, the electric power unit price storage unit 10 has means (not shown) for rewriting the electric power unit price so that the unit price can be updated in a timely manner and can cope with fluctuations in the electric power unit price.
[0012]
Reference numeral 12 denotes a total water meter that adds up all the used water amounts, 13 denotes a water unit price storage unit that stores the unit price of the water rate, and 14 denotes a water rate calculation unit that calculates a water rate from the total amount of water used. Here, the water-price unit storage unit 13 has means (not shown) for rewriting the unit price so that the unit price can be updated in a timely manner and can cope with fluctuations in the water-price unit.
[0013]
Here, a hot water storage hot water supply apparatus 1 shared by a plurality of households is composed of a heat pump hot water heater, 15 is a hot water storage tank unit having a hot water storage tank 16 for storing hot water, and 17 is hot water in the hot water storage tank 16. It is a heat pump unit having a heat pump circuit 18 for heating.
[0014]
The hot water storage tank 16 of the hot water storage tank unit 15 has a hot water discharge pipe 19 connected to the upper end, a water supply pipe 20 connected to the lower end, a heat pump forward pipe 21a constituting a heat pump circulation circuit 21 in the lower part, and a heat pump return pipe in the upper part. The hot water in the hot water storage tank 16 taken out from the heat pump outlet pipe 21a is boiled up by the heat pump unit 17, returned to the hot water storage tank 16 from the heat pump return pipe 21b, and hot water is stored. As a result, hot water in the hot water storage tank 16 is pushed up, and hot water in the upper part of the hot water storage tank 16 is pushed out from the hot water discharge pipe 19 to supply hot water.
[0015]
An electric mixing valve 22 is provided in the hot water supply pipe 19. The hot water from the water supply bypass pipe 23 branched from the water supply pipe 20 and the hot water from the hot water discharge pipe 19 are connected to a hot water supply temperature sensor 24 provided downstream thereof. The mixing ratio is adjusted so that the detected temperature becomes a predetermined hot water supply temperature (60 ° C. in this case).
[0016]
Next, the heat pump unit 17 includes a compressor 25, a refrigerant-water heat exchanger 26 as a condenser, an electronic expansion valve 27, and a forced air-cooled evaporator 28, and a heat pump circuit 18 as heating means. A heat pump circulation pump 29 for circulating hot water in the hot water storage tank 16 to the refrigerant-water heat exchanger 26 through the heat pump circulation circuit 21, and carbon dioxide is used as the refrigerant in the heat pump circuit 18. It constitutes a supercritical heat pump cycle. Since carbon dioxide is used as the refrigerant, low-temperature water can be boiled up to a high temperature of about 90 ° C. without an electric heater.
[0017]
Here, the refrigerant-water heat exchanger 26 employs a counter flow system in which the refrigerant and hot water in the hot water storage tank 16 which is heated water are opposed to each other. In the supercritical heat pump cycle, the refrigerant is exchanged during heat exchange. Since it is condensed in the supercritical state, the water to be heated can be efficiently heated to a high temperature so that the temperature difference between the refrigerant-water heat exchanger 20 inlet temperature and the refrigerant outlet temperature becomes constant. By controlling the electronic expansion valve 27 or the compressor 25, the COP (energy consumption efficiency) is 3 when the inlet temperature of the refrigerant-water heat exchanger 26 to be heated is a low temperature of about 5 to 20 ° C. It is possible to heat the water to be heated in a very good state of 0 or more.
[0018]
In this way, the electric power consumed when boiling the hot water in the hot water storage tank 16 is monitored by the wattmeter 9 for each time zone, and the electric energy is used using the power unit price for each time zone stored in the power unit price storage unit 10. Electricity charge X is calculated by the charge calculation unit 11.
[0019]
And if each household supplies hot water, the hot water storage type hot water supply apparatus 1 mixes the hot water stored in the hot water storage tank 16 and the water from the water supply bypass pipe 23 at a constant temperature by the electric mixing valve 22. Hot water. In each household, hot water is adjusted to a desired hot water temperature with the hot water mixing tap 7 and hot water is supplied.
[0020]
At this time, the total water meter 12 adds up the total water usage e for each household, and the hot water usage meter 3 and the usage water meter 5 add up the hot water usage a, b and the usage water volumes c, d for each household. Then, the water rate calculator 14 calculates a water rate from the unit price of water and the total amount of water used e stored in the unit price storage unit 13, and each household from the ratio of the amount of hot water used and the amount of water used for each household. Each water charge Y can be calculated. That is, the water charge Y (V) for the household V is calculated as Y · (a + c) / e, and the water charge Y (W) for the household W is calculated as Y · (b + d) / e. Therefore, it is possible to apportion the water rate accurately to each household individually.
[0021]
30 is an electric energy charge apportioning for calculating an electric energy charge to be distributed to each household from the ratio of the hot water usage of each household detected by the hot water meter 3 and the electric energy charge calculated by the electric energy charge calculation unit 11. In part 30, the electricity charge X (V) apportioned to household V is calculated by X · a / (a + b), and the electricity charge X (W) apportioned to household W is X · b / ( a + b).
[0022]
Since the electricity charge is apportioned according to the ratio of the amount of hot water used, a single hot water storage hot water supply device 1 can be shared by multiple households, and the facility cost of the housing complex can be reduced. At the same time, the electricity charge for hot water supply can be appropriately distributed to each household without unfairness.
[0023]
In this embodiment, an example in which one hot water storage type hot water supply apparatus is shared by two households has been shown. However, the present invention is not limited to this, and one hot water storage type hot water supply apparatus is shared by three or four households. Anyway. In addition, since the upper and lower floor households in the apartment house share one hot water storage type hot water supply device, it is not necessary to raise the heavy hot water storage type hot water supply device to the upper floor. Without limitation, a single hot water storage type hot water supply apparatus may be shared by a plurality of households on the same floor.
[0024]
【The invention's effect】
As described above, according to the present invention, it is possible to share a single hot water storage type hot water supply apparatus among a plurality of households, and it is possible to reduce the facility cost of an apartment house, and to charge the amount of power required for hot water supply , And water charges can be apportioned appropriately to each household without unfairness.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water storage type hot water supply apparatus according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hot water storage type hot water supply apparatus 2 Apartment house 3 Hot water meter 4 Hot water supply pipe 8 Power supply 11 Electricity charge calculation part 30 Electricity charge apportioning part

Claims (1)

In the hot water storage hot water supply system that is connected to the power supply of the lighting contract according to time zone and stores hot water that has been boiled to supply hot water to multiple households, each hot water supply pipe branched from the hot water storage hot water supply apparatus to each household is provided. A hot water meter for integrating the amount of hot water used for each household, and a water meter for integrating the amount of water used for each household provided in each of a plurality of water supply pipes branched from the hot water storage hot water supply device to each household; A total water meter that integrates all the water usage of each household and a power meter that integrates the power consumption of the hot water storage hot water supply system by time zone,
The electricity charge of the hot water storage hot water supply device is apportioned to each household according to the ratio of the amount of hot water used for each household,
All water charges for each household are distributed to each household according to the ratio of the amount of hot water used and the total amount of water used for each household.
A charge apportioning method for a hot water storage hot water supply system for an apartment house.

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