Energy management system, and energy management method

Patent metadata

Field	Value
Publication number	US-10714941-B2
Application number	US-201816160589-A
Country	US
Kind code	B2
Filing date	Oct 15, 2018
Priority date	Nov 13, 2017
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

To provide an energy management system that effectively uses a solar power generation system and a solar heat collection system to thereby make it possible to maximize a cost merit of a user. An energy management system related to the present invention includes: a solar power generation system that includes a solar panel to generate electric power on the basis of a solar light; a solar heat collection system that collects solar heat based on the solar light; and a control part that determines whether or not heat can be stored by the solar heat collection system from output characteristics of the solar power generation system and that drives the solar heat collection system in a case where the heat can be stored.

First claim

The invention claimed is:

1. An energy management system comprising:
a solar power generation system that includes a solar panel to generate electric power on the basis of a solar light;
a solar heat collection system that collects solar heat based on the solar light; and
a control part that determines whether or not heat can be stored by the solar heat collection system from output characteristics of the solar power generation system and that drives the solar heat collection system in a case where the heat can be stored wherein a latent heat storage material used in the solar heat collection system includes a first paraffin of an even carbon number and a second paraffin of an odd carbon number, the odd carbon number being larger the even carbon number by 1.

2. The energy management system according to claim 1 , wherein in the latent heat storage material, a mixing ratio of the first paraffin is 70 wt % or more and a mixing ratio of the second paraffin is 30 wt % or less.

3. The energy management system according to claim 1 , wherein the control part detects an amount of solar radiation to the solar power generation system from a value of a short circuit current of the solar power generation system and determines whether or not heat can be stored by the solar heat collection system on the basis of the amount of solar radiation.

4. The energy management system according to claim 1 , wherein the control part calculates a surface temperature of the solar panel from a value of an open circuit voltage of the solar power generation system and determines whether or not heat can be stored by the solar heat collection system on the basis of the surface temperature.

5. The energy management system according to claim 1 , wherein the control part controls use of thermal energy stored in the solar heat collection system on the basis of demand information of energy.

6. The energy management system according to claim 1 ,
wherein the solar panel and a heat storage panel of the solar heat collection system are composed as a solar panel integrated with a building material; and
wherein the solar panel and the heat storage panel are arranged so as to overlap in a light incident direction.

7. The energy management system according to claim 1 , comprising a battery that stores electric power generated by the solar power generation system,
wherein the control part controls use of electric power stored in the battery on the basis of demand information of energy.

Assignees

• Hitachi Ltd

Inventors

• Yoshimoto Naoki
• Satsu Yuichi

Classifications

• H10F19/00

  Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules · CPC title

• F24S60/10 Primary

  using latent heat · CPC title

• Y02E70/30

  Systems combining energy storage with energy generation of non-fossil origin · CPC title

• Y02B10/10

  Photovoltaic [PV] · CPC title

• Y02B10/20

  Solar thermal · CPC title