【 Weak current College 】 vegetable processing plant design for low temperature air conditioner

Low temperature air conditioning: workshop environment temperatures below 15 ° c
Scenario 1: ammonia-water cold air conditioning
Cold source: production of ammonia refrigeration systems
Air conditioning system: vertical evaporator, air-conditioning end (fan coil or type unit air conditioner)
Use the premise that in a production process refrigeration system design considerations of air conditioning load
Note: this item shall be provided by party a cold source, we provide building owners under the floor plan and related requirements for central air conditioning system design:
(1) the owner shall be in the room offer a range of building area for our design of a pool, i.e. cold media take cold places: the water tank placed vertical evaporator, provides air conditioning system required cooling capacity.
(2) air conditioning Terminal to set the fan coil 5、suspended air conditioner or cooler.
Selection of fan coil system, to bring wind effect better to set the Tuyere, including double louver, square diffuser, if owners of this no special requirement, you can direct side-blown, it can also select the cooler, less investment, but the effects of heat and cold wind hybrid than air blower plate Tube, reason comes from the fan coil of uniform layout and cooler large distance layout; the use of type unit air conditioner can make strewn comparison of cold and hot wind mixed evenly, only less than is needed to layout wind road and air, to the owners of the initial investment must increase.
Scenario 2: combination of low temperature air conditioning unit
Air conditioning system: with water cooled condensing unit for modular air conditioners, central air, the air conditioner can complement fresh air ventilation,
Note: the combined air conditioner in the evaporator, provides the necessary cooling air indoors. As winter need air conditioning, hot water directly into the cooler. The air conditioner can be placed in the room, can also be placed on the need for air conditioning in places (such as noise requirements for silencers), air-conditioning end need wind road and air, indoor air cleanliness and temperature control is better, but the relatively high investment costs.
Scenario 3: low-temperature brine unit
Air conditioning system: low-temperature brine unit, air-conditioning end (fan coil or type unit air conditioner, a combined air conditioner)
Note: If the owner requires a higher level, and the necessary air conditioning construction area is large, you can consider using low-temperature brine unit + fan-coil system or low-temperature brine unit + type unit air conditioner system, low-temperature brine unit + combined air conditioner system, low-temperature brine unit + fan-coil air conditioners 5、suspended, hybrid system combined air conditioner, air conditioning Terminal windy road and air. The effect of indoor air treatment, cost a little higher.
In the above scenario 1, add fresh fashion there are three kinds: one is by air supply unit; the second is on the wall installation for fan; the third is the selection of fresh air ventilator
Programme 2, 3, add fresh fashion there are four main: the first is through the air supply unit; the second is on the wall installation for the fans; the third is through the combined air conditioner large selection of fresh air transportation; four fresh air ventilator.
A. selection of air supply unit, fresh air, fresh air processor processing (cooling) into the air conditioning Terminal system or directly into the Interior, to complement the outdoor air. This applies to air conditioning Terminal not only combined air conditioner.
B. on the wall directly installed exhaust fan for ventilation, similarly to achieve the objective of the ventilation and the initial investment is less, but the Interior cooling capacity loss, is not conducive to saving energy.
C. Terminal only use type unit air conditioner, combined air conditioner, air conditioner by style, combined air conditioner large sent fresh air, you can achieve the purpose of sending fresh air, but this is equally not conducive to saving energy, and the selected unit refrigeration capacity increased.
D. selection of fresh air ventilator, access to the Interior of the fresh air and the Interior of the exhaust to heat, making full use of the indoor and outdoor air cooling capacity to lower the temperature or enthalpy value. This programme is the first three energy-saving, but the higher initial investment, operating costs are relatively low.
The above-mentioned scenario system exhaust there are four main ways: first, the use of the indoor air exhaust pressure nature; the second is to use a wall ventilator fan exhaust; three is equipped with special exhaust fan exhaust; fourth, selection of fresh air ventilator exhaust
A. use indoor positive pressure ventilation, save money, but easily indoor seal, seriously air leakage phenomenon.
B. use of ventilator fan exhaust, less investment, is not conducive to saving energy.
C. equipped with exhaust fan exhaust, the running cost is higher, the same is not conducive to saving energy.
D. selection of fresh air ventilator exhaust, high initial investment, system operation cost positive pressure ventilation, exhaust fan exhaust high, less equipped with exhaust fan exhaust programme, facilitate energy conservation.
The scope of the programme:
Scenario 1 is suitable for air conditioning construction area is not too big, and the owners only requires cooling purposes occasions; slightly better than the programme programme 2 1 preliminary investment programme, 1 high;
Scenario 3 is the face of high level requirements, the initial investment is relatively high, but the effect is better.
The system complements the fresh air and exhaust air programme, based on the unit's request for the appropriate design.
Owners be required to provide the walls and roof of the relevant parameters.