| |
VRV air-conditioning system |
Water Chilling Units+Boiler |
Nobao GSHP |
| Heat exchanging type |
Exchanging heat /cooling energy with air. |
Exchanging heat with water, open circulation, the heat of chilling water is released through water chilling tower to the air. |
Heat exchanging is through water and soil, and ground temperature is stable through whole year. |
| Environment |
Substantial amount of heat released to the air,will cause heat island effect. |
High energy consumption, massive carbon dioxide emission, noise pollution |
No carbon dioxide emission,no hear island effect,low energy consumption,green and clean energy. |
| System type |
Air-cooled model. low heat exchanging efficiency |
Water Chilling model, Open circulation, high water consumption |
Closed circulating water as the heat exchanging medium, exchanging heat with the soil ,stable system operation. |
| Efficiency depreciation |
In high and low temperature, heat pump efficiency depreciates substantially ,meaning its efficiency is running low when we desperately need them. |
Chilling water is subject to the influence of environmental temperature tremendously, so to affect the efficiency of the units. |
Underground temperature has small vibration and the heat pump efficiency almost have no depreciation, it can maintain good comfort when the outdoor temperature is too high or too low. |
| Coverage area |
The unit placed outside the room, noisy and could impact on the building landscape. |
Need indoor room or special boiler room ,taking lots of spaces. |
Indoor module unit is small-sized and space-saving, and assembled by any combination,and very low noise. |
| Lifespan |
10 - 12 years |
Water Chilling Units :15 years,Boiler :10 years
|
Above 25 years |
| Outdoor heat Exchanger |
The Air-cooled heat exchanger is easy to accumulate the dirt, and the improper cleaning can seriously affect the heat exchange efficiency |
Long term use, chilling tower heat exchanging efficiency decrease, and have the risk of bacteria breeding and catching Legionnaires s' disease risk, etc. |
Outdoor heat exchanging system established under ground once, so the space on the ground can be used. no need of maintenance, long lifespan . |
| Maintenance |
The unit breakdown will impact on the whole system, and great risk of outdoor maintenance(e.g. balcony, out wall, etc.) |
Need special personnel's daily maintenance, water chilling unit error will influence whole system. |
Only need to maintain the single unit and easy management, no influence of the system. |
| Energy saving |
High initial investment, and high operation cost |
Normal initial investment and high operation cost |
High initial investment but low operation cost ,it will save 60% energy comprehensively. |
| Risk of operation |
Hard to maintain, and whole system influence and risk of safety |
Policy restraint on heavy pollution, in need of regular inspection of fire prevention and safety departments |
No carbon dioxide emission, reliable,single unit error will not influence system operation, no need of inspection of fire prevention and safety department, and policy advocated. |
