Heat Recovery-Guolian Green Technology(Wuxi) Joint Stock Co., Ltd.

Heat Recovery

Heat Recovery-type Water Chilling Unit

The condensation heat recovery technology refers to recovery of condensation heat produced by chiller through the heat exchanger. This does not only reduce condensation heat emitted into the environment, and reduces environmental thermal pollution; it also saves energy by turning waste into wealth as it can be used for heating domestic water.

In the heat recovery-type water chilling unit of Johnson Controls, the standard condenser and heat recovery condenser are integrated into one barrel, and are provided with separate cooling water and hot water loops. The unit is mainly used for refrigeration. The recovery heat is the by-product of refrigeration. This guarantees high yearly comprehensive operation efficiency. In addition, the control center of the unit displays the inlet/outlet temperature of hot water, flow of heat recovery condenser, and operation trend. It is applicable to hotels, hospitals and some industrial enterprises.

The York heat pumps of Johnson Controls can be used for recovery of various types of industrial excess heat.

Heat Pump Heat Recovery

Heat pump unit absorbs heat from the excess heat resources in the evaporation process of refrigerant in the evaporator, and releases heat to the user side through the condensation process in the condenser. This way, it provides both cold water and hot water efficiently at the same time. In addition, the heat pump unit can also use the low-grade “waste” hot water as the heat pump heat source to produce high-temperature hot water, thus saving energy and improving efficiency. The heat recovery technology of Johnson Controls combines the advanced compressor of York, flooded high-efficiency heat exchanger, remarkable control functions and advanced energy adjustment technology, so as to ensure long-term effective and safe operation of the heat recovery system. It does not only generate tremendous economic benefit and social benefit, but also saves energy and reduces emission. Guolian Green Technology provides a variety of heat recovery and heat pump units of different working modes, including screw type, centrifugal type and absorbing type for customers. Guolian Green Technology also provides various technical services for customers including steam condensation water heat recovery and boiler flue gas heat recovery.

AHU Heat Recovery

The heat recovery unit is used to recover energy from the exhaust air and lower fresh air load. It is an effective energy saving measure in A/C system. When the heating or A/C equipment is in operation, there is certain temperature difference and humidity difference between indoor exhaust air and outdoor fresh air, which is also called baking difference. The heat recovery unit draws on the baking difference between the two for energy exchange, so as to allow parameters of fresh air flowing indoors to approach the state point of indoor air as much as possible.

York Runner Heat Recovery Fresh Air Unit

Large-temperature-difference Heating Technology

Large-temperature-difference technology is used to increase the difference between water supply temperatures and return temperature of the primary pipe network, so as to lower return water temperature on the primary side and reduce investment in construction of primary pipe network. This way, the pipe network thermal loss is reduced. It is applicable to extended hot-water heat-supply network and heating capacity increasing for old residential communities.

With heat source of power plant as the center, the steam-driven total-heat recovery unit is used to recover the waste heat of the condenser in full. The medium-temperature hot water is generated for centralized heating of the city.

The Johnson Controls combines advanced fresh air handling unit with heat recovery technologies.
Commonly used heat recovery technologies include:

Running Heat Recovery

Heat Pipe Heat Recovery

Liquid Circulation-type Heat Recovery

Running Heat Recovery

It is an integrated fresh air and exhaust air unit. The central part is a heat runner recovery unit. The runner functions as a heat storing core. The fresh air flows through a semicircle of the runner. The exhaust air flows through the other semicircle in a reversed way. The fresh air and exhaust air flow through the runner in a reversed way alternatively to realize heat exchange. In addition, the total-heat runner is used to ensure the moisture is separated from the air flow while heat is exchanged. The moisture flows into the moisture absorbing layer in the core for moisture exchange.

Heat recovery rate is as high as 70% to 80%;

It is of the compact design;

The heat carrier is made of the anti-corrosion aluminum. Surface coating is possible;

Total-heat exchange is possible;

Water and air can both be used for washing.

Heat Pipe Heat Recovery

Heat pipe is a heat exchange element that draws on phase change of working medium such as ammonia for heat exchange. When one end (evaporation section) of the heat pipe is being heated, the working medium in the pipe is vaporized due to the heat. The gaseous working medium, after heat absorption, flows to the other end along the pipe (condensation section), where the heat is released to the heated medium. The gaseous working medium becomes liquid due to heat loss and condensation, and flows back to the evaporation section downwards due to capillary and gravity. A thermodynamic cycle is thus completed.

It has a compact design. The heat transfer area of a single volume is remarkable.

It functions reliably and safely and has a long service life.

Each heat pipe forms a heat exchange system, and can be replaced easily.

There will be no cross contamination between fresh air and exhaust air.

Liquid Circulation-type Heat Recovery

Liquid circulation-type heat recovery is also called intermediate thermal-coal heat recoverer or mixed-type heat recoverer. It is a system made up of two sets of “water-air” heat exchanger (air cooler/heater) installed within the exhaust pipe and fresh air pipe connected through pipes. In order to ensure constant circulation and flow of liquid in the pipe, a circulating water pump is installed in the pipeline.

There will be no cross contamination between fresh air and exhaust air.

The heated side and heating side is connected by a pipe. There is no requirement for location. It is of compact design and flexible arrangement.

Both the heat exchange and circulating water pump can be ordinary general products.

It has a long service life and low operation cost.