DE19519981A1 - Determining proportional heat consumption of room compared to total heat consumed by entire heating system - Google Patents

Abstract

The difference between the average room air temp. and the air temp. a few cm above the room floor is added, as a measure for the ventilation heat loss. These sums are counted continuously or in regular pulse intervals as degree hours. These results are read out and in certain cases deleted. The degree hours result, for the computation, multiplied with the associated room constants: a) e.g. KW normal heat requirement, or b) in KW heater normal output, c) pref. in m<2> ground area. The share of the entire heat consumption is allocated and the heating costs are distributed according to the sum of all individual parts, or groups or dwellings.

Description

The procedure described below differs from the procedures usual today from the fact that

• 1. neither the heating water supplied to the radiator
• 2. still the heat given off by the radiator to the Space is measured
• 3. but the heat loss as a drop in temperature the outer walls, doors and windows.
• 4. The heat meter according to 1. can only for larger groups, z. B. Completed apartments can be used.
  This requires an appropriate pipe installation. Because of the possible risk of contamination and wear of moving parts, these meters must be checked and re-calibrated regularly.
• 5. All measuring devices mounted on the radiator surfaces after 2 are bound to tight radiator design data. In particular, the regulation set by the user for the purpose of saving energy leads to very large temperature spreads in the radiator, so that a relevant radiator mean temperature cannot be found for all operating conditions, since the heat output is output logarithmically with the excess temperature.
  The measured values displayed are sometimes difficult for laypersons to understand.
• 6. Both types of meters according to 3. and 4. have in common that the heat output of the radiator is measured. With the same room size, for example, a room with a gable wall under a normal roof needs 2.0. . . 2.3 times as much heat input as in a built-in middle apartment. With only one cold gable wall or only the cold ceiling, the heat requirement is still 1.7. . . 1.9 times the built-in normal apartment.
  A settlement with approx. 50% for measured values and 50% for m² values reduces these values somewhat, but changes in principle too little, so that many users are dissatisfied.
• 7. The procedure referred to in 3 avoids this injustice if, as in 2c of the claims, the settlement is switched back to the m² base area.
  Consumption-based billing remains unchanged.
  The measured values temperature or temperature difference, time in hours and m² of floor space in the room are easy to understand.
  The heat loss through external surfaces is linear with the temperature difference!
  An air change by opening the outer window or outer door for a longer time, also from the inner door to an unheated or less heated adjoining room, leads to "foot cold", because the colder and heavier air spreads over the entire floor and only after the window or door has been closed through the air circulation to the radiator is gradually warmed up again.
  The additionally measured temperature difference of mean. Room height to the floor should warn the user to quickly close these disturbances.
  In order to increase the incentive to save, all heating incidental costs should be offset against the measured consumption values, which also makes the billing effort easier.
• 8. The patent already granted could not be used economically, because at Ventilation the measured room temperature has become lower, although the radiator had to provide additional heat. In addition, was created in the summer months despite scarf heating a significant, undesirable heating of the Spaces that were incorrectly measured.  
• 9. The outdoor sensor according to this invention is therefore in the Measuring line provided a thermostat Th, the over the heating limit exceeds about 16. . . 19 degrees C den Circuit breaks, so no further measurement or counting takes place until the outside air temperature returns has dropped significantly.
• 10. The counter only measures positive values as a sum; a credit in case it is outside is not warmer than inside.

Description to the drawing

In the exemplary embodiment, 4 thermocouples type K so poled in series that the warmer Room sensors with increasing temperature, the colder ones Outside air sensor and above the floor when it sinks deliver rising thermal voltage to the temperatures.

The total connection lines of these 4 sensors then exist from the same material, so no additional Element formation occurs!

With a high-impedance amplifier input, the length is of sensor lines and careful execution no longer critical.

With the offset voltage, the measuring device, Sensor and connecting lines adjusted.

A low negative voltage should be set thus the measuring current when the thermostat contact is opened goes to 0.

It can also provide a certain amount of indoor heat be compensated for by people or lighting. For similar apartments, these values are also similar, so that they are neglected for the distribution of heating costs can be.

Claims (5)

1. A method for determining the proportionate heat consumption of a room to the total heat consumption of a heating system, characterized in that

• a) by measuring the difference between the average room air temperature and outside air temperature as a measure of the transmission heat loss, additionally
• b) adding the difference between the average room air temperature and the air temperature a few cm above the floor as a measure of the ventilation heat loss,
• c) these sums are counted continuously or at regular intervals as degrees and
• d) read after any heating period and deleted if necessary.

2. For billing these degree hours with the associated room constants,

• a) for example in kW standard heat requirement or
• b) in kW standard radiator output,
• c) preferably in m² of floor space,

multiplied, the share of the total heat consumption.
The heating costs are distributed over the sum of all individual parts, groups or apartments. 3. An additional thermostat switches the measurement / Counting above approx. 16. . . 19 degrees C, e.g. B. during the summer months. 4. An overall negative temperature difference will not counted.