A bit of real estate development business is not willing to increase investment, to eliminate all the temperature control valve, although indoor systems, not revealed serious imbalance phenomenon, but must cause the vertical imbalance between each layer inside the building. This scheme, each room temperature regulating necessities flexibility, but improve the uneven and between each layer in the building, a more up to now the domestic economy. The preset conditions, the size of the radiator thermal conductive plane or surface, are preset conditions, the layers of radiator default appearance uniform temperature calculation. The change rule, the outside is not the same as the preset temperature, namely the coldest air temperature, the system straight disorder, the most serious is no top and the lowest layer at room temperature deviation between the maximum; Air temperature warming, vertical imbalance also gradually slow. Double pipe system vertical imbalance, is a natural cycle utility head changing actuating system flow and initiation. It should be noted that the temperature control valve used method, its strength is increased by heating regulation performance, and can detract from at the beginning of the project investment; The want is per each room at room temperature for the same standard, can't we adjust. When the outdoor temperature range preset temperature outside. Outside the preset temperature, all the actual flow rate is less than the preset flow ( Relative flow rate is less than 1) , all show leadership, lower cold phenomenon; All the actual flow is greater than the preset flow ( Relative flow rate is greater than 1. 0) Have occurred leadership is cold, and the lower heat things look like. Table 1 for water supply temperature fixed eternal things, this situation is accord with a big flow heating system display, uneven distribution of the actual working condition has the representative. Loss of investment, puts forward the indoor system ( A home a heating system) Only install a temperature control valve solutions. General situation, should be each set of radiator ( Each room) Install a temperature control valve. 2. Inside a single executive system only at the end of the house of a temperature control valve. Q: temperature control valve installation position answer: 1, the radiator thermostatic valve installed on each radiator inlet pipe ordinary or household heating system on the total entry pressure pipe. To reduce the cost, regulating function and does not affect the heating system, double executive within the system, the entrance of indoor unit, a temperature control Industrial Valves, its long-range temperature sensor can be placed no matter what the house. Vertical single pipe system disorder unique place is the greater the flow, at the end of the room temperature is higher; The smaller the flow, at the end of the house in the lower room temperature is, the hot special properties of single pipe system, household, a thermostatic valve should be in accordance with the principle as follows: ( 1) Single pipe downstream indoor system, a temperature control valve should be installed the system the end of the house wants a cooling device; ( 2) Take over tube sheet in the executive system, a temperature control valve should be installed indoor system on the inlet water supply or return pipe, the temperature control valve long-range temperature sensor to put indoor system the most at the end of the room; ( 3) Old building rational fraction on single pipe downstream system, each riser, a thermostatic valve should be installed radiator bottom room, at this point, for the use of calories should see fit and calories distributor measurement. Below first analyze the single pipe system hot special nature, namely the flow with the room temperature change rule, and points out that temperature control valve installation method. But in actual operation, the uneven distribution of flow, the layers of radiator exterior uniform temperature change ratio will be difference with the default condition. Especially for the built-in sensors is not advocating a vertical installation, the valve body and appearance pipe heat effect is likely to cause constant temperature stem misoperation, should guarantee the thermostatic valve sensor can sense to the local circulation temperature, curtain box, such as central heating cover. 2, loss of investment, puts forward the indoor system ( A home a heating system) Only install a temperature control valve solutions. This kind of system, the most ideal solution is each on the radiator temperature control valve. General speaking, the main radiator are scattered calories depends on uniform temperature in the cooling device appearance. 。 When the actual flow is less than the preset flow riser ( The relative Marine valve flow rate is less than 1. 0) , the riser is greater than the preset temperature difference between supply and return water temperature difference, the leading uniform temperature than the lower radiator radiator appearance looks even more helpful to the cooling temperature, revealed the hot under cold phenomenon; Relative flow rate is greater than 1. 0, the situation is the opposite of things. Synthetic analysis software using heat supply network conditions for a five floors above rational fraction single pipe system (downstream Also suitable for use in indoor single pipe downstream system) Perform calculations, which finally the results are shown in table 1. Single pipe system comprised of this vertical imbalance phenomenon, the main flow fluctuation and radiator exterior temperature changes are not identical. 2. 2 pairs of executive department unify a indoor temperature control valve is installed at the entrance. Engineering practice, also confirmed this.
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