暖通空调设计--暖通英才网(国外英文资料).doc(3)

Design of ventilation and air conditioning in the swimming pool is often ignored or not noticed is the air moisture content is the objective law and changes with the outdoor climate, so to eliminate indoor air quantity powder moisture content should also be changed, the maximum quantity of fresh air, that is the system air volume should be eliminated at critical state the indoor air quantity (amount of wet powder I recommend: outdoor air temperature indoor air dew point temperature is equal to the critical state)。

In order to meet this requirement, the ventilation and air conditioning system shall be designed with two fans, the return air and the new exhaust air can be adjusted, and the heat recovery device can be designed to save energy consumption when conditions permit。2, the noise eliminationNoise elimination is often random and can be asexual。 Noise calculation is usually neglected, except for special requirements, so it is often unsatisfactory。 The common problems are:According to the arrangement of the possibility of setting noise elimination equipment, set up air muffler equipment but ignore the air muffler equipment; no conditions set silencing equipment, in the so-called static pressure box (in fact is only over the box) attached to the inside insulation sound-absorbing material is considered, which increased the resistance loss, the silencing effect is not enough, if insulation sound-absorbing material stuck to the wall is not close, but too thin and no reinforcement measures,will increase the additional vibration and noise。

The noise concentration of return air exceed the standard often perplexing users暖通英才网首页, muffling devices are arranged in the air conditioning room, two regeneration noise and wind noise should be paid more attention, this attitude should also learn the overseas construction unit construction drawing design。 TheWind noise can not be ignored either。 Wind noise often occurs at the beginning of the air supply at the beginning of the air outlet。 Because of the wind pipe end equipment exports often by size or configuration, because of the space crunch, the design of wind pipe size is too small, the wind speed is large, the outlet of howling wind noise, due to air diversion is not considered good, do not send out the wind outlet, sometimes even suction occurred。

Air volume adjustment without air velocity is too large, the individual can also be caused by wind noise。 The2, the isolationFan, water pump, air conditioner and air conditioning equipment, isolation treatment duct pipe should arouse sufficient attention, provide a variety of design detailing overseas construction drawings in the map, said very detailed, it is worth learning。 There is a basic practice of a water pump factory in the sample, the anchor bolt with the pump body, cushion and foundation fixed directly, although a cushion is not a damping effect, according to engineering construction under the pump is caused by the vibration and noise of large conference room, meeting room, not the normal use。

The equipment is connected with the weighting concrete block, and the cushion cushion of the concrete block is added (not fixed) so as to achieve the purpose of real shock absorption。 Weighted concrete block weight is more than 1。5 times the weight of equipment is better。 Damping design calculation is also not to be ignored。4, the air supply inletBecause different types of air supply outlets have different air flow manifolds, the air supply type should be considered in different situations, so they can not be used blindly。

As a project in the rooms of the bed at the top of the use of 100 tuyere in general, flat top height is not high, resulting in the cold feeling, later changed the diffuser attached jet flow pattern, to obtain good results。 As a movie theater Gallery outlet under the DC type air blowing straight the audience, the audience too cold to escape, and later in the outlet and the decorative plate to be improved。 The5, the water filterThe heat transfer efficiency of the plate heat exchanger is high, and it can be exchanged at a very small temperature difference (0。

5 ~ 1 DEG C), so it is used more widely in the air conditioning system。 But there is a notable problem is that the water filter must be installed before the board, and the water filter screen to meet the necessary fineness, should be greater than 60。 A lot of engineering for water filtration is not up to the requirements, in turn by blocking the water flow is too large, so that the water resistance increases, such as a project board before the turn of the water filter screen is thick, resulting in the pressure plate, 0。

35MPa board to pay only after the 0。07MPa, the resistance loss is as high as 0。28MPa, only in the 0。07MPa after delivery。 How to complete the normal cycle?Plate type heat exchanger by plugging and water flushing system is also properly, irrigation must partition air conditioning equipment (including board pay), in the supply and return water pipe between the temporary increase in the bypass pipe, repeated washing for the return water pipe, can be combined with the air conditioning equipment for washing。

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