DE102007025813A1 - Operation of heating, ventilation and air conditioning plant with integrated solar system, employs solar collectors to cool air supplied, especially at night - Google Patents

Abstract

Especially during the night, air supplied is cooled. Heat is removed using the solar collection system, as soon as the heating load determined by the heating controller becomes negative. The ratio between outside air temperature and room temperature required, is used to calculate the desired air supply temperature. The air supplied is cooled, when this ratio becomes negative. One or more solar collectors are used. They have absorbers without covers. An independent claim IS INCLUDED FOR corresponding equipment.

Description

The Invention relates to a method for operating a heating, Ventilation and / or air conditioning with an integrated solar system according to the preamble of claim 1.

Heat energy from environmentally friendly and renewable energy sources, such as the heat energy from the exhaust air or solar energy, is also increasingly used in recent years with ventilation supply systems for heating buildings, on the one hand to save fossil fuels and thus reduce the heating costs and on the other to reduce pollutant emissions with the climate-influencing combustion product CO ₂ .

To For this purpose, as is generally known, heat recovery systems or solar air systems used, with which the supplied outside air flow to the ventilation supply system for the heating of buildings by the heat energy the exhaust air or is heated by solar panels. Especially in the cold seasons, where the incoming outside air flow too can be in minus range, therefore, there is a substantially increased Heat energy requirement for reheating the supply air flow to to reach the set point temperature, which is for the ventilation Supply system is required.

Is known for example from the DE 10 2004 057 441 B3 a method for minimizing primary energy consumption in a ventilation supply system operated with heat energy dissipated by means of a heat recovery system at a temperature lower than the thermally-designed input temperature of the heat exchanger from a volume flow derived directly from a collector of a liquid-operated solar system , is preheated to a maximum of the thermally designed inlet temperature of the heat exchanger. In this case, the outside air flow flows through an additional heat exchanger integrated in the outside air flow guide and in front of the heat exchanger of the heat recovery system cold side, and the collector temperature and the temperature of the outside air are measured and compared. In the presence of a higher collector temperature, a temperature-dependent regulated and circulated volume flow is derived from the collector, which is led directly to the warm side via the heat exchanger for preheating the outside air flow. In known systems, the preheating of the supply air takes place in the so-called priority / secondary operation. Here, the hot water tank is primarily loaded. However, if the temperature of the solar collector is insufficient to charge the hot water storage tank, the pump will shut down in the solar circuit and an additional pump will allow the supply of fresh air to be preheated using solar energy, bypassing the hot water storage tank. This occurs when the outside air temperature is lower than the collector temperature.

at the known subordinate heating of the supply air is in checked at regular intervals, whether the collector temperature is sufficient to the hot water tank to load.

task The present invention is particularly for buildings with ventilation systems and an already existing solar system, for example, for hot water or heating support, a cost effective cooling option to accomplish.

According to the invention this is solved with the features of claim 1. advantageous Further developments can be found in the dependent claims.

The Method for operating a heating, ventilation and / or Air conditioning system with an integrated solar system, in particular for Tempering the supply air for a building, needed at least one solar collector connected to a solar circuit Pump is connected, in which a solar fluid as Heat transfer medium over a Heat exchanger for the supply air circulates. Furthermore, a controller with at least one temperature sensor for the outside air and the collector temperature intended. The temperature of the supply air is corresponding to a Control parameters based system and system characteristics with a particular of measured values for outside air and collector temperature determined heating load.

marked is the method of operating a heating, ventilating and / or air conditioning with an integrated solar system in that Cooling of supply air at night, especially at night Heat dissipation via the at least one solar collector begins as soon as the heating load determined in the heating controller is negative becomes. The ratio between is used to calculate the set supply air temperature Outside temperature and desired room temperature, wherein the cooling of the supply air begins when this ratio becomes negative.

In this way, part of the heat of a building can be dissipated via the solar collectors. Measurements have shown that on clear nights, the absorber temperature can be up to 10 K below the ambient temperature, ie the outside air temperature. By taking advantage of this effect, it is possible to cool the supplied outdoor air at night. This saves energy and Comfort gained in the building.

to Implementation of the method, it is therefore advantageous if Solar collectors can be used with an absorber without cover. To this genus, in which an optimal cooling effect arises include in particular swimming pool absorbers.

With The invention is therefore particularly for buildings with ventilation systems and an already existing solar system a cost effective cooling option available, the method in principle with a relatively simple, uncomplicated control technology to operate is.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 2004057441 B3 [0004]

Claims (3)

Method for operating a heating, ventilation and / or air conditioning system with an integrated solar system, in particular for controlling the supply air for a building, with at least one solar collector, which is connected to a solar circuit with a pump in which a solar fluid as the heat transfer medium over a heat exchanger for the supply air circulates, with a controller, at least with temperature sensors for the outside air and the collector temperature, wherein the temperature of the supply air is controlled according to a supported by control parameters system and system characteristics with a determined in particular from measured values for outdoor air and collector temperature heating load , characterized in that, in particular at night cooling of the supply air with a heat dissipation via the at least one solar collector used as soon as the heating load determined in the heating controller is negative. Method according to claim 1, characterized in that that for calculating the target supply air temperature, the ratio between outside temperature and desired room temperature serves, with the cooling of the supply air used, if this Ratio becomes negative. Apparatus for carrying out the method according to Claims 1 or 2, characterized in that at least a solar collector with an absorber without cover used becomes.