JP2013213644A - Hot water supply system using solar heat - Google Patents

Hot water supply system using solar heat Download PDF

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JP2013213644A
JP2013213644A JP2012085276A JP2012085276A JP2013213644A JP 2013213644 A JP2013213644 A JP 2013213644A JP 2012085276 A JP2012085276 A JP 2012085276A JP 2012085276 A JP2012085276 A JP 2012085276A JP 2013213644 A JP2013213644 A JP 2013213644A
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hot water
solar heat
solar
water supply
flow rate
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Ken Yasuda
研 安田
Masahiro Yahagi
正博 矢作
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Tokyo Gas Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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Abstract

PROBLEM TO BE SOLVED: To provide a technology that allows each consumer to easily recognize a degree of energy saving by use of solar heat in a central hot water supply system using a solar energy collector.SOLUTION: First, an outside air temperature To at 0:00 in the morning is obtained through a sensor S2 (S102). Then a tap water temperature is estimated by formula 1 (S103). An amount of use of solar heat during use of hot water is calculated by formula 2 and the amount is accumulated with time (S104). The calculation result is always displayed on a remote controller 6 as a cumulative amount of use of solar heat of the day (S105). Further, at 24:00, information about the cumulative amount of use of solar heat in the day is stored in an external memory (S106). Thus, the consumer can recognize the amount of use of solar heat in any period such as by day, by month or by year, through an operation of the remote controller.

Description

本発明は、太陽熱集熱器によるセントラル給湯システムにおいて、太陽熱利用による省エネ度を各需要者が簡易に認識可能とする技術に関する。   The present invention relates to a technology that enables each consumer to easily recognize the degree of energy saving due to the use of solar heat in a central hot water supply system using a solar heat collector.

従来、集合住宅の屋上等に太陽熱集熱器を設置して、集めた熱を貯湯タンクに温水として蓄え、各住戸に設置した給湯器に予熱水として供給して、省エネ化を図るセントラル給水予熱方式が公知である。この場合、各住戸の需要者に太陽熱利用による省エネ度を実感してもらうためには、太陽熱の利用量を計測して給湯器リモコン等に視覚的に表示することが効果的である。
しかしながら、住戸ごとの太陽熱利用量を計測するためには、個別に熱量計等を設置する必要があり、コスト的に困難である。従って、現状では集合配管部に熱量計を配設して、住棟全体の太陽熱利用量をエントランス等に表示するに止まっている。
るという問題がある。 Conventionally, a central water supply preheating system that installs solar heat collectors on the rooftops of apartment buildings, stores the collected heat as hot water in hot water storage tanks, and supplies it as hot water to the water heaters installed in each dwelling unit. The method is known. In this case, it is effective to measure the amount of use of solar heat and visually display it on a hot water heater remote control or the like in order for consumers of each dwelling unit to realize the degree of energy saving by using solar heat.
However, in order to measure the solar heat usage for each dwelling unit, it is necessary to install a calorimeter or the like separately, which is difficult in terms of cost. Therefore, at present, only a calorimeter is provided in the collective piping section, and the amount of solar heat usage of the entire residence building is only displayed at the entrance.
There is a problem that.

太陽熱温水器を経由する温水熱量を計測して節約量を表示可能とする技術として、特許文献１が公知である。同文献による給湯装置１００は、図４に示すように太陽熱温水器１０２から温水管１０３を経由する温水と、水道管１０４を経由する水道給水とを混合弁１１０で混合した後、バーナ１１３で加熱後して給湯管１０５を介して供給する。温水管１０３、水道管１０４，給湯管１０５にはそれぞれ温度センサ１０６，１０７，１０８が配設されている。また、給湯管１０５には流量センサ１０９が配設されている。これらのセンサにより、各配管中を通過する水又は温水の温度、流量を計測し、さらに太陽熱温水器１０２を通した場合の熱量Ｑａと、太陽熱温水器を通さない場合の熱量Ｑｂとを比較して、節約量を給湯器リモコン１１２に表示可能とするものである。   Patent Document 1 is known as a technique for measuring the amount of hot water passing through a solar water heater and displaying a saved amount. As shown in FIG. 4, a hot water supply apparatus 100 according to the same document mixes hot water from a solar water heater 102 through a hot water pipe 103 and tap water through a water pipe 104 with a mixing valve 110 and then heats it with a burner 113. Later, the hot water supply pipe 105 is supplied. Temperature sensors 106, 107, and 108 are disposed on the hot water pipe 103, the water pipe 104, and the hot water supply pipe 105, respectively. A flow rate sensor 109 is disposed in the hot water supply pipe 105. These sensors measure the temperature and flow rate of water or hot water passing through each pipe, and compare the amount of heat Qa when passing through the solar water heater 102 with the amount of heat Qb when not passing through the solar water heater. Thus, the saved amount can be displayed on the water heater remote control 112.

特開２００３−２７９１４４号公報JP 2003-279144 A

同文献は太陽熱温水器を各戸に設置したシステムに関する技術であり、セントラル給湯方式のシステムに関して開示するものではない。また、熱量演算に際しては給湯器に入る水（この場合は、太陽熱によって予熱されている水）の温度とは別に、市水の水道水温度を検知する必要があるが、通常、給湯器には上記両方の水温を計測できる手段は搭載されておらず、この技術を汎用的に適用することは困難である。   This document is a technology related to a system in which solar water heaters are installed in each house, and does not disclose a central hot water system. In addition, it is necessary to detect the city water tap water temperature separately from the temperature of the water entering the water heater (in this case, the water preheated by solar heat). There is no means for measuring both of the above water temperatures, and it is difficult to apply this technique for general purposes.

本発明は上記課題に鑑み、給水温度計測手段を搭載していない一般的な給湯器にも適用可能な、セントラル給湯方式による太陽熱利用給湯システムを提供する。
本発明は、以下の内容を要旨とする。すなわち、本発明に係る太陽熱利用給湯システムは、
（１）集合住宅の屋上等に設置した太陽熱集熱器で集めた熱を、水道水と熱交換して予熱水として蓄える貯湯タンクと、各住戸に配設した補助給湯器と、を備え、貯湯タンク内の予熱水を補助給湯器で利用する太陽熱利用給湯システムであって、
補助給湯器は、外気温（Ｔｏ）を検知する外気温検知手段と、太陽熱集熱器から供給される予熱水流量（Ｆ(t)）を検知する流量検知手段と、
外気温（Ｔｏ）から、水道水温度（Ｔｗ）を推定する回帰式（１）を格納する手段と、を備えて成り、
外気温（Ｔｏ）と、補助給湯器に供給される予熱水流量（Ｆ(t)）と、回帰式（１）に基づいて求めた水道水推定温度（Ｔｗ）と、を用いて、(２)式により各住戸の太陽熱利用量の推定演算を可能に構成した、
ことを特徴とする太陽熱利用給湯システム。
Ｔｗ＝αＴｏ＋β ・・・・（１）
α、βは地域により定まる係数であり、具体的には例えば表１に示される。

Figure 2013213644
Ｑ(t)：その日の太陽熱利用量積算値（ｋＪ）
Ｔｈ：貯湯タンク２ｂから供給される温水温度（℃）
Ｆ(t)：貯湯タンク２ｂから供給される温水流量（Ｌ/min）
ｋ：エネルギー換算係数（4.186Ｊ／cal） In view of the above problems, the present invention provides a solar hot water supply system using a central hot water system that can be applied to a general hot water heater not equipped with a feed water temperature measuring means.
The gist of the present invention is as follows. That is, the solar water heating system according to the present invention is
(1) A hot water storage tank that stores heat collected by a solar heat collector installed on the rooftop of a housing complex as tap water by exchanging heat with tap water, and an auxiliary water heater disposed in each dwelling unit, A solar hot water supply system that uses preheated water in a hot water storage tank with an auxiliary water heater,
The auxiliary water heater includes an outside air temperature detecting means for detecting the outside air temperature (To), a flow rate detecting means for detecting the preheated water flow rate (F (t)) supplied from the solar heat collector,
Means for storing the regression equation (1) for estimating the tap water temperature (Tw) from the outside air temperature (To),
Using the outside air temperature (To), the flow rate of preheated water supplied to the auxiliary water heater (F (t)), and the estimated tap water temperature (Tw) calculated based on the regression equation (1), (2 ) Formula to calculate the solar heat usage of each dwelling unit.
A solar hot water supply system characterized by that.
Tw = αTo + β (1)
α and β are coefficients determined by the region, and are specifically shown in Table 1, for example.
Figure 2013213644
 Q (t): Solar heat utilization integrated value of the day (kJ)
Th: Hot water temperature (° C) supplied from the hot water storage tank 2b
F (t): Hot water flow rate (L / min) supplied from the hot water storage tank 2b
k: Energy conversion factor (4.186J / cal)

（２）上記発明において、前記外気温検知手段が、前記補助給湯器に搭載されている凍結予防運転用外気温度センサであり、前記流量検知手段が、前記補助給湯器に搭載されている給湯運転制御用流量センサであることを特徴とする。 (2) In the above invention, the outside air temperature detecting means is an outside air temperature sensor for freeze prevention operation mounted on the auxiliary water heater, and the flow rate detecting means is mounted on the auxiliary water heater. It is a control flow sensor.

（３）上記各発明において、推定した前記太陽熱利用量を表示する手段を、住戸ごとに備えたことを特徴とする。 (3) In each of the above inventions, a means for displaying the estimated solar heat usage amount is provided for each dwelling unit.

本発明によれば、各戸に高価な熱量計を設置することなく、集合号住宅の各需要者に簡易に太陽熱エネルギーの恩恵を実感してもらうことができるという効果がある。   According to the present invention, there is an effect that it is possible to easily realize the benefits of solar thermal energy to each consumer of the collective housing without installing an expensive calorimeter in each house.

また、補助給湯器に標準搭載されている外気温度センサ及び出湯温度制御用流量センサを用いて太陽熱利用量の推定演算を行う発明によれば、別個に外気温検知手段、流量検知手段を搭載する必要がないため、低コストで本システムの構築が可能となるという効果がある。   In addition, according to the invention for performing an estimation calculation of the solar heat usage amount using the outside air temperature sensor and the hot water temperature control flow rate sensor that are standardly installed in the auxiliary water heater, the outside air temperature detecting means and the flow rate detecting means are separately mounted. Since it is not necessary, the system can be constructed at low cost.

本発明の一実施形態に係る太陽熱利用給湯システム１（強制循環タイプ）の全体構成を示す図である。It is a figure which shows the whole structure of the solar water utilization hot water supply system 1 (forced circulation type) which concerns on one Embodiment of this invention. 同じく太陽熱利用給湯システム１’（自然循環タイプ）の全体構成を示す図である。It is a figure which similarly shows the whole structure of solar-heating utilization hot water supply system 1 '(natural circulation type). 給湯器５の詳細構成を示す図である。It is a figure which shows the detailed structure of the hot water heater. 各戸における太陽熱利用量の推定演算フローを示す図である。It is a figure which shows the estimation calculation flow of the solar heat utilization amount in each house. 従来の太陽熱利用給湯装置１００の構成を示す図である。It is a figure which shows the structure of the conventional solar heat utilization hot water supply apparatus.

以下、本発明の一実施形態について、図１（ａ）乃至３を参照してさらに詳細に説明する。なお、本発明の範囲は特許請求の範囲記載のものであって、以下の実施形態に限定されないことはいうまでもない。   Hereinafter, an embodiment of the present invention will be described in more detail with reference to FIGS. Needless to say, the scope of the present invention is described in the claims and is not limited to the following embodiments.

図１（ａ）を参照して、本実施形態に係る太陽熱利用給湯システム１は、集合住宅３の屋上に設置された太陽熱集熱装置２と、各住戸３ａに設置され、太陽熱集熱装置２により予熱された水を配管４ｂ、４ｃを介して導入する給湯器５と、各住戸内に配設される給湯器リモコン６と、を主要構成として備えている。   With reference to Fig.1 (a), the solar-powered hot-water supply system 1 which concerns on this embodiment is installed in the solar-heat collector 2 installed in the rooftop of the apartment house 3, and each dwelling unit 3a, and the solar-heat collector 2 The main components are a water heater 5 that introduces water preheated through the pipes 4b and 4c, and a water heater remote controller 6 disposed in each dwelling unit.

太陽熱集熱装置２は、太陽熱を集熱する集熱パネル２ａと、集熱パネル２ａで集熱した太陽熱を温水として蓄熱する貯湯タンク２ｂと、集熱パネル２ａと貯湯タンク２ｂ間を熱媒循環させる循環ポンプ２ｄ及び循環配管２ｃと、熱媒と水道給水とを熱交換させる熱交換器２ｅと、により構成されている。
貯湯タンク２ｂ内には、給水配管４ａを経由して水道水が供給される。また、熱交換により貯湯タンク２ｂ内に蓄熱された温水は、予熱水配管４ｂ、分岐配管４ｃを経由して各戸の給湯器５に供給される。 The solar heat collector 2 includes a heat collecting panel 2a for collecting solar heat, a hot water storage tank 2b for storing solar heat collected by the heat collecting panel 2a as hot water, and a heat medium circulation between the heat collecting panel 2a and the hot water storage tank 2b. The circulation pump 2d and the circulation pipe 2c to be made, and the heat exchanger 2e for exchanging heat between the heat medium and the water supply water are configured.
Tap water is supplied into the hot water storage tank 2b via the water supply pipe 4a. Moreover, the hot water stored in the hot water storage tank 2b by heat exchange is supplied to the hot water heater 5 of each house via the preheating water piping 4b and the branch piping 4c.

図２を参照して、給湯器５は筐体５ａ内部にバーナ５ｃ，熱交換部５ｄ、燃焼ファン（図示せず）、排気部（図示せず）を備えている。貯湯タンク２ｂから繋がる分岐配管４ｃは機内の給水配管５ｂに接続し、給水配管５ｂはさらに熱交換部５ｄに接続している。また、熱交換部５ｄ出側は機内給湯管５ｇに接続し、さらに住戸内給湯配管５ｊと接続している。   Referring to FIG. 2, the water heater 5 includes a burner 5c, a heat exchanging portion 5d, a combustion fan (not shown), and an exhaust portion (not shown) inside the housing 5a. A branch pipe 4c connected from the hot water storage tank 2b is connected to an in-machine water supply pipe 5b, and the water supply pipe 5b is further connected to a heat exchange section 5d. Further, the outlet side of the heat exchanging section 5d is connected to the in-machine hot water supply pipe 5g and further connected to the dwelling unit hot water supply pipe 5j.

以上の構成により、太陽熱利用給湯システム１は集熱パネル２ａで集熱した太陽熱を貯湯タンク２ｂにおいて温水として蓄熱し、これを給湯器５に予熱水として供給する。給湯器５においては、予熱水温度が出湯要求温度以上の場合にはそのまま給湯する。また、要求温度に達していない場合には、不足熱量分をバーナ５ｃにより加熱昇温して給湯可能としている。   With the above configuration, the solar heat utilizing hot water supply system 1 stores the solar heat collected by the heat collecting panel 2a as hot water in the hot water storage tank 2b and supplies the hot water to the water heater 5 as preheated water. In the water heater 5, when the preheated water temperature is equal to or higher than the required hot water temperature, the hot water is supplied as it is. When the required temperature has not been reached, the amount of insufficient heat is heated by the burner 5c so that hot water can be supplied.

給水配管５ｂ経路中には流量センサＳ１が配設されており、貯湯タンク２ｂから供給される温水流量を計測可能に構成されている。また、筐体５ａ内の外気温検知可能な位置には温度センサＳ２が配設されている。なお、流量センサＳ１は給湯運転制御用、また温度センサＳ２は凍結予防運転等のためにとして、給湯器５に標準搭載されている計測装置である。   A flow rate sensor S1 is provided in the route of the water supply pipe 5b so that the flow rate of hot water supplied from the hot water storage tank 2b can be measured. In addition, a temperature sensor S2 is disposed at a position where the outside air temperature can be detected in the housing 5a. Note that the flow rate sensor S1 is a measuring device that is installed in the hot water heater 5 as a standard for controlling the hot water supply operation and the temperature sensor S2 for preventing freeze operation.

給湯器５は流量センサＳ１、温度センサＳ２の計測値に基づいて、後述する太陽熱利用量の演算を可能とする制御部５ｈを備えている。制御部５は、ＣＰＵ、ＲＯＭ、ＲＡＭ、クロック、等を備えたマイコン及び外部メモリを主要構成とする装置により実装可能である。
制御部５ｈの外部メモリには、（１）式に示す地域別気温（Ｘ：（℃））と水道水温度（Ｙ：（℃））の一次回帰式の係数α、βのテーブル（表１）が格納されている。
Ｙ＝αＸ＋β ・・・・（１）
なお、（１）式及び係数α、βは、「給湯設備設計用基礎データの検討・整備に関する研究 第８報」（空気調和・衛生工学会学術講演会講演論文集［'97.8.27〜 8.29］）に基づいて設定したものである。 The water heater 5 includes a control unit 5h that enables calculation of a solar heat utilization amount, which will be described later, based on the measurement values of the flow rate sensor S1 and the temperature sensor S2. The control unit 5 can be implemented by a device mainly composed of a microcomputer having a CPU, ROM, RAM, clock, and the like and an external memory.
In the external memory of the control unit 5h, a table of coefficients α and β of linear regression equations of the regional temperature (X: (° C.)) and tap water temperature (Y: (° C.)) shown in equation (1) (Table 1). ) Is stored.
Y = αX + β (1)
Equation (1) and coefficients α and β are “Study on the examination and maintenance of basic data for hot water supply equipment design 8th report” (Proceedings of the Air Conditioning and Sanitary Engineering Conference Lecture ['97 .8.27-8.29 ]).

回帰式の係数は、（１）の発明の場合は、α＝０．８９、β＝２．２３を用いる。（３）の発明の場合は表１の値を用いる。

Figure 2013213644
In the invention of (1), α = 0.89 and β = 2.23 are used as coefficients of the regression equation. In the case of the invention of (3), the values in Table 1 are used.
Figure 2013213644

各戸室内には、制御部５ｈに接続するリモコン６が配設されており、タッチパネル（図示せず）の適宜選択により、後述するように給湯使用に伴う太陽熱利用量を表示可能に構成されている。   A remote control 6 connected to the control unit 5h is disposed in each door room, and is configured to be able to display the amount of solar heat usage associated with the use of hot water supply as will be described later by appropriate selection of a touch panel (not shown). .

太陽熱利用給湯システム１は以上のように構成されており、次に図３を参照して、制御部５ｈにより実行される各戸の太陽熱利用量推定方法、リモコン６への表示方法等について説明する。
本推定に先立ち、予め（１）式の演算に適用される当該住棟地域（又は最近接地域）の係数α、βが、表１のテーブルの中から選定されているものとする（Ｓ１０１）。
最初に、毎日午前０時の外気温（Ｔｏ）を当該日の代表外気温として、センサＳ２により取り込む（Ｓ１０２）。次に、（１）式により水道水温を推定する（Ｓ１０３）。
次いで、（２）式により給湯使用時に太陽熱利用量の演算、時間経過に伴う積算を行う（Ｓ１０４）。 The solar heat utilization hot water supply system 1 is configured as described above. Next, with reference to FIG. 3, a solar heat utilization amount estimation method for each door, a display method on the remote controller 6, and the like executed by the control unit 5h will be described.
Prior to this estimation, it is assumed that the coefficients α and β of the residential building area (or nearest neighbor area) applied in advance to the calculation of equation (1) are selected from the table of Table 1 (S101). .
First, the outside temperature (To) at 0:00 every day is taken in by the sensor S2 as the representative outside temperature of the day (S102). Next, the tap water temperature is estimated by equation (1) (S103).
Next, the solar heat utilization amount is calculated when hot water is used according to the equation (2), and integration with time is performed (S104).

Figure 2013213644
Ｑ(t)：その日の太陽熱利用量積算値（ｋＪ）
Ｔｈ：貯湯タンク２ｂから供給される温水温度（℃）
Ｆ(t)：貯湯タンク２ｂから供給される温水流量（Ｌ/min）
ｋ：エネルギー換算係数（4.186Ｊ／cal）
Figure 2013213644
 Q (t): Solar heat utilization integrated value of the day (kJ)
Th: Hot water temperature (° C) supplied from the hot water storage tank 2b
F (t): Hot water flow rate (L / min) supplied from the hot water storage tank 2b
k: Energy conversion factor (4.186J / cal)

演算結果は、その日の太陽熱利用量積算値としてリモコン６に常時表示される（Ｓ１０５）。さらに、２４時時点において、その日の太陽熱利用量積算値情報を外部メモリに保存する（Ｓ１０６）。これにより、需要者は１日、１月、１年単位等、任意の期間の太陽熱利用量を、リモコン６の操作により認識可能となる。   The calculation result is always displayed on the remote controller 6 as the solar heat utilization integrated value for that day (S105). Furthermore, the solar heat utilization integrated value information for the day is stored in the external memory at 24 o'clock (S106). As a result, the consumer can recognize the amount of solar heat used for an arbitrary period such as 1 day, 1 month, 1 year, etc. by operating the remote controller 6.

本実施形態による太陽熱利用量推定値の精度は必ずしも高いとはいえないが、課金に用いるのではなく、太陽熱による恩恵を実感してもらうことを目的とするのであれば、十分な精度であるといえる。   Although the accuracy of the solar heat usage estimated value according to this embodiment is not necessarily high, if it is not intended to be used for billing but for the purpose of realizing the benefits of solar heat, it is sufficient accuracy I can say that.

なお、本実施形態では水道水温を、回帰式（１）を用いて推定する例を示したが、他の手段、例えば予め1年間の水道水温平年値の統計データを、例えば給湯器に内蔵されている制御基板に備えた外部メモリに格納しておき、これを用いて推定してもよい。   In this embodiment, the tap water temperature is estimated by using the regression equation (1). However, other means, for example, statistical data of the tap water temperature average value for one year in advance is built in, for example, a water heater. It may be stored in an external memory provided in the control board and estimated using this.

また、本実施形態では太陽熱集熱装置２として強制循環タイプを用いる例を示したが、図１（ｂ）に示すように自然循環タイプの集熱パネル７ａ及び貯湯タンク７ｂを用いた太陽熱集熱装置７を用いる態様とすることもできる。   Moreover, although the example using a forced circulation type was shown as the solar heat collecting device 2 in this embodiment, as shown in FIG.1 (b), the solar heat collection using the natural circulation type heat collection panel 7a and the hot water storage tank 7b is shown. It is also possible to adopt a mode in which the device 7 is used.

本発明は、集合住宅の太陽熱利用給湯システムのみならず、戸建の太陽熱利用給湯システムの太陽熱利用量推定にも適用可能である。   The present invention can be applied not only to the solar heat utilization hot water supply system of an apartment house, but also to the estimation of the amount of solar heat utilization of a solar heat utilization hot water supply system of a detached house.

１・・・・太陽熱利用給湯システム（強制循環タイプ）
１’・・・太陽熱利用給湯システム（自然循環タイプ）
２、７・・・・太陽熱集熱装置
２ａ、７ａ・・・集熱パネル
２ｂ、７ｂ・・・貯湯タンク
４ａ・・・給水配管
４ｂ・・・予熱水配管
４ｃ・・・分岐配管
５・・・・給湯器
５ｈ・・・制御部
６・・・・給湯器リモコン
Ｓ１・・・流量センサ
Ｓ２・・・温度センサ 1 .... Hot water supply system using solar heat (forced circulation type)
1 '... Solar hot water supply system (natural circulation type)
2, 7 ... Solar heat collecting devices 2a, 7a ... Heat collecting panels 2b, 7b ... Hot water storage tank 4a ... Water supply piping 4b ... Preheating water piping 4c ... Branch piping 5 ... .... Hot water heater 5h ... Control unit 6 ... Hot water heater remote control S1 ... Flow sensor S2 ... Temperature sensor

Claims (3)

集合住宅の屋上等に設置した太陽熱集熱器で集めた熱を、水道水と熱交換して予熱水として蓄える貯湯タンクと、各住戸に配設した補助給湯器と、を備え、貯湯タンク内の予熱水を補助給湯器で利用する太陽熱利用給湯システムであって、
補助給湯器は、外気温（Ｔｏ）を検知する外気温検知手段と、太陽熱集熱器から供給される予熱水流量（Ｆ(t)）を検知する流量検知手段と、
外気温（Ｔｏ）から、水道水温度（Ｔｗ）を推定する回帰式（１）を格納する手段と、を備えて成り、
外気温（Ｔｏ）と、補助給湯器に供給される予熱水流量（Ｆ(t)）と、回帰式（１）に基づいて求めた水道水推定温度（Ｔｗ）と、を用いて、(２)式により各住戸の太陽熱利用量の推定演算を可能に構成した、
ことを特徴とする太陽熱利用給湯システム。
Ｔｗ＝αＴｏ＋β ・・・・（１）
α、βは地域により定まる係数。
Figure 2013213644
 Ｑ(t)：その日の太陽熱利用量積算値（ｋＪ）
Ｔｈ：貯湯タンク２ｂから供給される温水温度（℃）
Ｆ(t)：貯湯タンク２ｂから供給される温水流量（Ｌ/min）
ｋ：エネルギー換算係数（4.186Ｊ／cal） A hot water storage tank that stores heat collected by a solar heat collector installed on the rooftop of a housing complex as preheated water by exchanging heat with tap water, and an auxiliary water heater installed in each dwelling unit. A solar hot water supply system that uses the preheated water in an auxiliary water heater,
The auxiliary water heater includes an outside air temperature detecting means for detecting the outside air temperature (To), a flow rate detecting means for detecting the preheated water flow rate (F (t)) supplied from the solar heat collector,
Means for storing the regression equation (1) for estimating the tap water temperature (Tw) from the outside air temperature (To),
Using the outside air temperature (To), the flow rate of preheated water supplied to the auxiliary water heater (F (t)), and the estimated tap water temperature (Tw) calculated based on the regression equation (1), (2 ) Formula to calculate the solar heat usage of each dwelling unit.
A solar hot water supply system characterized by that.
Tw = αTo + β (1)
α and β are coefficients determined by the region.
Figure 2013213644
 Q (t): Solar heat utilization integrated value of the day (kJ)
Th: Hot water temperature (° C) supplied from the hot water storage tank 2b
F (t): Hot water flow rate (L / min) supplied from the hot water storage tank 2b
k: Energy conversion factor (4.186J / cal) 前記外気温検知手段が、前記補助給湯器に搭載されている外気温計測用センサであり、
前記流量検知手段が、前記補助給湯器に搭載されている給湯運転制御用流量センサであることを特徴とする請求項１に記載の太陽熱利用給湯システム。 The outside air temperature detecting means is an outside air temperature measuring sensor mounted on the auxiliary water heater,
The solar-powered hot water supply system according to claim 1, wherein the flow rate detection means is a flow rate sensor for hot water supply operation control mounted in the auxiliary water heater. 推定した前記太陽熱利用量を表示する手段を、住戸ごとに備えたことを特徴とする請求項１又は２に記載の太陽熱利用給湯システム。



The solar-powered hot water supply system according to claim 1 or 2, wherein means for displaying the estimated amount of solar heat usage is provided for each dwelling unit.



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