China heat pumps, air source heat pump, heat pump manufacturer, supplier, exporter-DIBETTER

University Information
NIEU is defined as the key national university, co-built by Jiangsu Provincial Government and China Meteorological Administration(CMA). This university is located in capital Nanjing with beautiful scenery and ancient culture.
Now, this university plans to utilize high efficient and energy-saving air source heat pump water heater for five building hot water supply.  See Details below:

Heat pump unit configuration
1. Reference Standard
Design Standard:
GB/T18713—2002  Technical Code for The Design, Installation & Acceptance of Heat Pump System
GB/T6424—1997 Technical Specifications of Air-source Heat Pump
GB/T4271—2000 Methods of Measuring the Performance of Air-source Heat Pump
GB/T15513—1995 Air Source Heat Pump Evaluating Method
Design and Installation of Air Source Heat Pump & Water Heating System
QB/T15816—2004 "Installation Standards for Heat Pump System"
Construction and Installation Standards for Heat Pump System
GB50015-2003 "Design Code for Water & Drainage Engineering of Buildings"
GBJ 9-87 Loading Code for Design of Building Structures

2. Design Project
▲Design Parameter:
Climate condition: Considering cold wether in winter but meeting hot water supply in winter, lowest ambient temp. is set as 5℃.
Make-up water temp. Lowest:5℃; heating extent:50℃ 
Watered temp.: rated hot water temp.:55℃
Design mode: cycling constant hot water and make-up water heated
Unit normally average working hours: on base of  10-18 hours

▲ Water Consumption:
 "Design Code for Water & Drainage Engineering of Buildings" GB50015-2003 as a rule, water consumption below:

Series	Building title	person or bed / day	Top daily water consumption (L)	Operating timing(H)
1	Domitory Self-prepared hot water supply and shower installation; Central hot water supply and shower installation;	per person per day per person per day	40~80 L 60~100 L	24hrs
2	Villa	per person per day	70~110 L	24hrs
3	Single person and students dormitory; Reception hotel, Training center, General hotel; Public washroom Public washroom,shower room; Public washroom;shower room; Laundry room; Individual toilet, public laundry room;	per person per day; per person per day; per person per day; per person per day	25~40L 40~60L 50~80L 60~100L	24hrs
4	Hotel and Guest room Tourist;Employee;	Per bed per day; per person per day	120~60L 40~50L	24hrs
5	In-patient Department Public washroom; Public washroom;shower room; Individual toilet;	Per bed per day Per bed per day Per bed per day	60~100L 70~130L 110~120L	24hrs

According to basic information above, 125 T water consumption per day, in total, equipping five heat preservation water tank, stainless steel, each volume 25T. 

Heat pump unit:
10 units- RS-200-12G recirculating high efficient heat pump water heater unit

System equipment and Water tank Choice
Unit: Compressor-American top brand Copeland, function stable, noise low, technique reference advantageous over other same type, 15 years guarantee.
Electronic valve: American top brand Alco, all units tested,no leaking before deliver; automatic defrosting function.  
Heat preservation water tank: Stainless steel material, PU foam technique inside, hardness and good effect for warmth. This technique is nowadays the state of the art in the world. More or less 5 ℃ temp. tolerance in 24 hrs
Piping and accessory: PPR piping,joint,valve,etc. All accessory from domestic top products, owning quality testing report.
Heating preservation material: piping heat preservation uses rubber and plastic,one of most excellent material.

Automatic controlling system: Unit control is automatic system, applied in water level of tank, temperature, heating cycling and automatic on and off, reaching the purpose of energy conservation and emission reduction and reliable operation. 

Heat pump performance reference
Unit title: Dibetter air source heat pump water heater

Techical parameter
Standard working condition:20℃
Model	RS-200-12G
Rate Input	9765W
Heating Capacity	38280W
Power	380VAC/50HZ
Rate Current	18.5A
Hot water offer	55℃
working ambient temp	－5℃～40℃
make-up hot water frequency	823L/h
coolant	R22
（COP）COP%	400%
Duct Diameter	DN40
Size	1450×705×1315
Net weight	325 kg

Air source heat pump water heater Investment Returns Analysis
1. Safety Comparison

Hot water Equipment	Dibetter heat pump unit	Electrical water heater	Gas water heater	Diesel oil boiler
Energy consumption	Electricity	Electricity	gas	Diesel oil
Environment Pollution	No	No	Gas Exhaust	Diesel Exhaust
Safety	Safe	electrothermal tube aging; short circuit hidden trouble	Gas leaking,fire,exploding,etc	Oil leaking,fire,exploding,etc
Unit Life	14～16 years	6～8 years	6～8years	6～8years

2. Saving energy comparison
3. Daily average running cost comparison from different types water heater on basis of 125T, 55℃ hot water (40℃ temp.rise)

Energy Equipment Type	Total Thermal required		Unit(kcal/kg)		Energy Consumption		Energy unit price		Energy expenses per day
Gas water heater Thermal efficiency 75%	5000,000kcal	÷	7,072kcal/kg	＝	70kg	×	6.2yuan/kg	＝	RMB 4383 yuan
Diesel boiler Thermal efficiency 75%	5000,000kcal	÷	6,612kcal/㎏	＝	756㎏	×	6.5yuan/㎏	＝	RMB 4914 yuan
Electricwaterheater thermal efficiency 90%	5000,000kcal	÷	774kcal/degree	＝	6460degree	×	0.9yuan/degree	＝	RMB 5814 yuan
Dibetter air source HPWH thermal efficiency 400%	5000,000kcal	÷	3,440kcal/D G	＝	1453degree	×	0.9yuan/degree	＝	RMB 1308 yuan

Monthly running cost comparison:
◆ Dibetter air source water heater: 1308yuan /day ×30days＝39240yuan/mon;
◆ Gas water heater: 4383yuan/day×30days＝131490yuan/month;
◆ Diesel boiler: 4914yuan/day×30days＝147420yuan/month;
◆ Electric water heater: 5814yuan/day×30days＝174420yuan/month;

Yearly running cost comparison:
◆ Dibetter air source water heater: 39240yuan/mon×12months＝470880yuan/year;
◆ Gas water heater: 131490yuan/mon×12months＝1577880yuan/year;
◆ Diesel boiler: 147420yuan/mon×12months＝1769040yuan/year;
◆ Electric water heater:174420yuan/mon×12months=2093040yuan/year.

Energy-saving benefit comparison:
Compared with Gas water heater: 1577880-470880=1107000  yuan/year;
Compared with Diesel boiler: 1769040-470880=1298160 yuan/year
Compared with Electric water heater: 2093040-470880=1622160yuan/year