【Daily Question】Question from Issue 20150813
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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. Multiple-choice question: When designing the heating system for a large-scale exhibition center in a very cold region, which heating methods are unreasonable? ( ) (A) Heating is provided by gas infrared radiators, installed at a height of 7.5m. (B) Heating is provided by space heaters, also installed at a height of 7.5m. (C) Heating is achieved using bedroom-type air conditioning units with swirl-type air outlets, which are installed in the ceiling at a height of 6.5m. (D) Winter heating is provided by concealed fan-coil units combined with a fresh air system; these units are installed in the ceiling at a height of 6.5m. New activities have started in the production area – there are great prizes available, so come and participate quickly: 【Production Over Summer】 The production area has entered the “training during the hot summer days” mode
I’m just participating; I don’t understand anything about it. Let’s choose option A – gas infrared radiation heating. It sounds pretty sophisticated
When designing the heating system for a large-scale exhibition center in extremely cold regions, which heating methods are unreasonable? ( BD ) The height of the warm air fans is determined based on the wind speed; as stated in Article 4.6.6 of the Heating Code, the installation height of the centralized supply outlets for hot air heating is generally between 3.5 and 7 meters
When designing the heating system for a large-scale exhibition center in a very cold region, which heating methods are unreasonable? (BD) (A) Heating is provided by gas infrared radiators, installed at a height of 7.5m. (B) Heating is provided by space heaters, also installed at a height of 7.5m. (C) Heat air heating is achieved using bedroom-type air handling units, with swirl air outlets installed on the ceiling at a height of 6.5m. (D) Winter heating is provided by concealed fan-coil units combined with a fresh air system, which are installed within the ceiling at a height of 6.5m
(D) Winter heating is achieved using concealed fan-coil units combined with a fresh air system, which are installed in the ceiling at a height of 6.5 meters
When designing the heating system for a large-scale exhibition center in a very cold region, which heating methods are unreasonable? ( ) (A) Heating is provided by gas infrared radiators, installed at a height of 7.5m. (B) Heating is provided by space heaters, also installed at a height of 7.5m. (C) Heating is achieved using bedroom-type air conditioning units with swirl-type air outlets, which are installed in the ceiling at a height of 6.5m. (D) Winter heating is provided by concealed fan-coil units combined with a fresh air system; these units are installed in the ceiling at a height of 6.5m. Answer: BD. Analysis: According to Article 5.6.3 of the Civil Code, the installation height of infrared radiators should not be lower than 3m ； Clause 4.5.4 of the ‘Warmth Standards’ stipulates that the installation height of infrared radiators should be determined based on human comfort, but it should not be less than 3m ； Table 1.4-13 on page P52 of the textbook also specifies the minimum installation height corresponding to different transmission powers. Therefore, option A is the reasonable choice; do not select A. On page 67 of the textbook, under the notes on selecting small heating fans, it is stated that the installation height of the heating fan should meet the following requirements: when the outlet wind speed is 5 m/s, the height should be between 4 and 5.5 meters. For large heating fans, when the distance from the lower edge of the factory building is 8 meters, the appropriate height is between 5 and 7 meters ； ； Therefore, option B is incorrect and should not be chosen. The interpretation of Article 4.6.6 of the «Warmth Standards» stipulates that the installation height of centralized supply outlets for hot air heating should be such that the working area falls within the recirculation zone, thereby preventing direct airflow from hitting the human body. The installation height of the air outlet should generally be between 3.5 and 7 meters ； Section 2.8.7.3 of the \"Technical Measures\" stipulates that the installation height of supply air outlets should be determined based on factors such as the room height and the height of the recirculation area; it generally should not be lower than 3.5 m, nor higher than 7 m.
This post was last edited by hhhxh5712 on 2015-8-13 14:55. When designing heating systems for large exhibition centers in extremely cold regions, which heating methods are unreasonable? （ A ）
When designing the heating system for a large-scale exhibition center in a very cold region, which heating methods are unreasonable? ( (B) Heating is provided by a space heater, installed at a height of 7.5m. (D) Winter heating is achieved using concealed fan coils together with an air renewal system, which are installed in the ceiling at a height of 6.5m.)
When designing the heating system for a large-scale exhibition center in a very cold region, which heating methods are unreasonable? ( )B) Heating is provided by a space heater, installed at a height of 7.5m. (D) Winter heating is achieved using concealed fan-coil units combined with a fresh air system, which are installed in the ceiling at a height of 6.5m
When designing the heating system for a large-scale exhibition center in a very cold region, which heating methods are unreasonable? (B, D) (A) Heating is provided by gas infrared radiators, installed at a height of 7.5m. (B) Heating is provided by space heaters, also installed at a height of 7.5m. (C) Heat air heating is achieved using bedroom-type air conditioning units, with swirl-type air outlets installed on the ceiling at a height of 6.5m. (D) Winter heating is accomplished through concealed fan-coil units combined with a fresh air system, which are installed within the ceiling at a height of 6.5m
B, C, D. Not suitable-----------