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Through closed Double-U undergroud pipeline system, Nobao Ground Source Heat Pump main machine module extracts and powers the liquid that exchanges the heat or cold with the underground geothermal energy to provide multi HVAC functions to the relevant buildings.
Nobao GSHP fully utilized the gigantic energy stored in the ground, renewable, the effective energy saving is up to 50% to 70%, it is an integrated high efficient energy saving “Green” and environmentally friendly central air conditioner, providing cooling, heating and domestic hot water, etc.
 
  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.

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