DE202022000809U1 - System for generating heating and service water using solar power - Google Patents

Abstract

System for generating thermal heat and service water using solar power, in which the heating circuit takes thermal energy from the service water storage tank (9) via a heat exchanger, characterized in that a controller (15) controls a boiler (5) and the entry of solar panels (13 ) Electrical energy generated via a heating element (10) in a water heater (9) between an upper temperature range and a lower temperature range controls.

Description

BACKGROUND OF THE INVENTION

Storage for the heating circuit or service water storage in heating systems are currently primarily heated via burners with solid, liquid or gaseous fuels. In addition, some systems have a circulation system to a thermal solar system or heating rods supplied by a solar system.

Burners usually heat up in short operating cycles and are only in the optimum range for longer running times. This reduces efficiency, leads to higher average consumption, more wear and tear and thus increased operating and energy costs.

OBJECT OF THE INVENTION

The object of the invention is to reduce and lengthen the number of operating cycles and to lower the operating and energy costs.

SOLUTION

In order to optimize the operating times, it is proposed to heat only one service water storage tank and to supply the heating circuit via a heat exchanger. The service water storage tank is additionally heated directly with heating elements that are supplied with direct current from solar cells and has a wider temperature window.

Here, a controller controls both the heating temperature, circulation of the heating circuit as well as the electric direct heating and the temperature range in the service water storage tank depending on the time of day, the output of the solar cells, the target temperature range in the storage tank and demand.

Depending on the performance of the solar cells, the size of the temperature window of the storage tank and the heat extraction through the heating circuit, the operating cycles are reduced and the burning times in the optimum range are longer.

By using storage devices for the electrical energy, this can also be adjusted for the night time or for predicted bad weather conditions (snowfall, cloud cover).

In the event of a burner failure or in the event of very unfavorable weather conditions, a basic supply of heat can be guaranteed via the mains supply.

STATE OF THE ART

EP0194637B1 describes a circuit for controlling a fuel-heated heat source that charges a service water storage tank by means of a temperature controller and temperature sensor and ammeter.

A device with an electrically heated heat storage tank for hot water preparation is in EP2811233A2 disclosed, in this case the electric current is primarily used via direct current with low voltage from a solar cell device, but also current from the grid if required. This solution is primarily used to support existing hot water preparation, but does not control it.

The German utility model DE 20 2009 016 131 U1 describes a system for increasing the yield of photovoltaic systems with the supply of artificial light, for feeding energy into an AC voltage network, for heating support and for hot water preparation, primarily it is about the interconnection of various electrical components for power generation by combining a photovoltaic system operated by sunlight on a building roof and a Photovoltaic system in the building operated by artificial light.

EN202005016100U1 shows a solar thermal center with sandwich collectors, where the heat generated reaches a heat storage tank via a heat transfer fluid and heats heating and service water there via a heat exchanger.

character list

• 1 shows the modules used in the system: heating circuit flow (1), heating circuit pump (2), heating circuit mixer (3), heating circuit distributor (4), heating boiler (5), heating flow (6), heating return (7), motor valve (8 ) Service water storage tank (9), heating rod (10), hot water outlet (11), cold water inlet (12), solar panels (13), DC lines (14), controller (15), heating circuit return (16).

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 0194637 B1 [0009]
• EP 2811233 A2 [0010]
• DE 202009016131 U1 [0011]
• DE 202005016100 U1 [0012]

Claims (5)

System for generating thermal heat and service water using solar power, in which the heating circuit takes thermal energy from the service water storage tank (9) via a heat exchanger, characterized in that a controller (15) controls a boiler (5) and the entry of solar panels (13 ) Electrical energy generated via a heating element (10) in a water heater (9) between an upper temperature range and a lower temperature range controls. Plant using solar power claim 1 , characterized in that the target temperature range in the hot water tank (9) varies depending on the time of day, the power of the solar cells, the outside temperature, the anticipated consumption and the optimum efficiency of the thermal bath. Plant using solar power claim 1 , characterized in that the upper temperature range in the service water storage tank (9) is reached intermittently over short operating cycles and long burning times of the thermal bath (5). Plant using solar power claim 1 , characterized in that excess electrical energy is fed into a battery storage or the network. Plant using solar power claim 1 , characterized in that the temperature at the extraction point of the process water is increased via a water heater.

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