Energy Recovery for HVAC Systems Liquid Type Central Air Conditioner with Heat Recovery

Energy Recovery for HVAC Systems Liquid Type Central Air Conditioner with Heat Recovery

1.Introduction

Heat pump type liquid desiccant air conditioning is an air dehumidification equipment with solution (lithium bromide, lithium chloride, calcium chloride, etc.) as the working fluid, The unit is driven by a heat pump and adopts advanced solution dehumidification technology,through the solution to absorb or release moisture to the air, to achieve the adjustment the humidity of air.It is not an ordinary fresh air ventilator,it is a fresh air treatment equipment integrating cold and heat source, dehumidification section, regeneration section, filter section, air supply section and exhaust section,It is flexible in application, simple in operation, and energy-saving, and is suitable for occasions where dehumidification and cooling are required in harsh environments such as air pollution, toxicity, and odor.

2.Product or system advantage

1) Save energy and protect the environment

a. The working temperature of the dehumidification section is 18-25 °C, which avoids the energy waste caused by the need for reheating when the dehumidification temperature is too low, and improves the cooling capacity of the heat pump;

b. Dehumidification ,cooling and solution regeneration are driven by heat pumps, and more than 90% of the condensation heat is recycled, which greatly improves the cooling efficiency of the system and does not discharge waste heat to the surrounding area.

c. Using countercurrent solution recovery to increase the circulation speed of the heat recovery solution, the total heat recovery efficiency reaches over 63%.

2) Strong dehumidification ability and wide application range

a. The air can be treated with various functions such as cooling  dehumidification, heating dehumidification, cooling humidification, and heating  humidification, which is suitable for the requirements of fresh air treatment throughout the year;

b. It can be treated with low humidity to meet the needs of fresh air dehumidification with high temperature and high humidity environments in tropical and subtropical summer.

3) Improve indoor air quality

a. High-concentration salt solution can kill most bacteria, viruses and other molds, and the killing rate can reach more than 99%, providing a favorable defense weapon against airborne diseases such as influenza and coronavirus;

b. Independent and precise control of temperature and humidity to provide comfortable, healthy and good indoor air.

4) Stable performance

a. The salt solution does not decompose and volatilize, has stable moisture absorption and regeneration efficiency, is less affected by changes in fresh air and return air parameters, does not decay in dehumidification performance, and has a long service life.

3.Product features:

1. The counter-flow air supply design has high gas-liquid heat exchange efficiency, and the volume is more compact compared with the cross-flow air supply design, and the equipment occupies a smaller area of the computer room;

2. The super absorbent core is made of polymer fiber material through a series of processes such as compression molding, high temperature carbonization, bonding, curing, etc. It has the advantages of anti-aging, corrosion resistance, mildew resistance, and long service life;

Combined with the design of counter-flow air supply, it can effectively solve the common liquid-carrying problem in cross-flow air supply;

3. Advanced solution concentration control technology, the unit has stronger and more accurate dehumidification capacity, and the minimum fresh air humidity can be controlled at 3g/kg.

4.The original double countercurrent heat recovery technology, the two-stage pumps operate independently of each other, increase the circulation speed of the heat recovery solution, and recover the waste heat more efficiently, reaching more than 63%.

5. International standard, reliable operation:

a. The solution tank is integrally formed, and there is no risk of air leakage and liquid leakage;

b. The heat exchanger is made of titanium tube, which will never rust.

c. Refrigeration components, controller components, water pumps, fans and other main components are all internationally renowned brands, which are stable and reliable

6.Liquid type central air conditioner , fresh air capacity controlable and supply air temp.&humi. setting easily, makes air conditioning more easier and more energy saving .
7.Temperature and humidity are controlable independently. 
8.Both of fresh air and return air are handled in an integrated design unit , benefit to do installation and beautiful appearance

4.working Principle

5.Product parameters

Unit Model		AHLD-TAH10(03)	AHLD-TAH12(036)	AHLD-TAH15(045)	AHLD-TAH20(06)	AHLD-TAH25(075)	AHLD-TAH30(09)	AHLD-TAH40(12)
Power supply		3PH-380V -50Hz
Supply air m³/h		10000	12000	15000	20,000	25000	30000	40000
Return air m³/h		7000	8400	10500	14,000	17500	21000	28000
Fresh air m³/h		3000	3600	4500	6,000	7500	9000	12000
Cooling capacity kg/h		87	104	132	174	216	266	347
Dehumidifying capacity kg/h		64	77	96	128	160	192	256
Heating capacity kW		92	111	139	185	231	277	370
Humidifying capacity kg/h		24	29	37	49	61	73	98
Power kW		17.3	20.2	26.7	33	40.1	51.4	61.6
Supply Air excess pressure  Pa		350	350	350	350	350	350	350
Noise  dB(A)		67	68	69	71	72	73	75
Weight  kg		2660	2956	3823	4521	5263	6283	7355
Fresh air unit
Fresh air m³/h		3000	3600	4500	6000	7500	9000	12000
Exhaust air m³/h		3000	3600	4500	6000	7500	9000	12000
Cooling capacity kg/h		63	75	96	125	156	193	250
Dehumidifying capacity kg/h		62	74	93	124	155	186	248
Heating capacity kW		41	49	61	81	101	122	162
Humidifying capacity kg/h		24	29	37	49	61	73	98
Power kW		12.4	14.8	20.4	25.2	29.8	39	45.1
Compressor type		Fully closed scroll compressor
Throttle Modes		Thermal Expansion valve
Desiccant		R407C
Exhaust Fan Type		outer rotor centrifugal fan
Filter grade		primary (G4)
Exhaust air excess pressure Pa		170	280	320	250	190	300	280
Weight  kg		2050	2200	2650	3080	3580	4350	5140
Mix air unit
Filter grade		primary (G4)
Weight  kg		100	140	175	195	210	265	320
Cooling capacity supplied  kW		24.2	29.1	36.4	48.5	60.6	72.7	96.9
heating capacity supplied kW		51.9	62.2	77.8	103.7	129.7	155.6	207.5
Inlet/outlet temp.		Cold water 14/19℃ ;Hot water 50/45℃
Cold water flow m3/h		4.2	5.0	6.2	8.3	10.4	12.5	16.6
Hot water flow m3/h		8.9	10.7	13.3	17.8	22.2	26.7	35.6
Adapter tube		DN40	DN40	DN50	DN50	DN65	DN65	DN80
water resistance kPa		<60
Weight  kg		170	230	320	400	510	610	740
Supply air unit
Fan Type		Belt driven double inlet centrifugal fan
Motor power kW		4.9	5.4	6.3	8.2	10.3	12.4	16.5
Weight  kg		340	386	678	846	963	1058	1155
Note:
1. Norminal cooling and dehumidification working   conditions: fresh air dry bulb temp. 36℃, RH 65%;return air dry bulb temp.   27℃, RH 60%; supply air dry bulb temp. 17℃,wet bulb temp. 16℃(RH   90%,11g/Kg);Cold water supply for return water temp.14/19℃
2. Norminal heating and dehumidification working   conditions: fresh air dry bulb temp. -5℃, RH 50%;return air dry bulb temp.   20℃, RH 50%; supply air dry bulb temp. 35℃,wet bulb temp. 19.1℃(RH   21%,7.4g/Kg);Hot water supply for return water temp.50/45℃

Application