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Introduction and Case Sharing of Heat Pipe Heat Recovery Variable Frequency Dehumidifier - Saving Millions in Electricity Costs Annually

2025-12-29

Saving over a million in electricity cos...

Project Introduction

1. Traditional constant temperature and humidity units use chilled water for cooling and dehumidification, and electric heating for reheat to control temperature and humidity, resulting in extremely high energy consumption. The operation of dual-stage water pumps leads to higher maintenance costs in the long run.

2. In this case, the customer reported that the new product requires lower humidity. The old equipment could not achieve 25°C, 35% RH, and had extremely high power consumption and low product yield.

3. Based on the customer's energy consumption analysis, we designed a variable frequency water-cooled temperature-adjusting dehumidifier with cold and heat recovery. The customer's energy consumption plummeted, from the original 145 kW to a usage power of 11.7 kW, saving over a million in annual electricity costs.

4. The new equipment achieves better humidity uniformity and lower humidity. While saving energy, it increased the product yield from the original 60% to 98%, achieving cost reduction and efficiency improvement.

5. Customer's actual measurements using the cold and heat recovery method show a cooling COP as high as 10.3. Using recovered condenser heat for reheating results in a comprehensive COP as high as 16.

Inlet Air

Heat

Recovery

Pre-cooling

Deep

Cooling

Heat

Recovery

Pre-heating

Condenser

Reheat

Heat Transfer

Cooling Transfer

Supply Air
Energy Consumption Comparison

vs Traditional Chilled Water + Electric Heating: Saves 120 kWh/hour

vs High-Energy Consumption Desiccant Wheel Dehumidification: Saves 130 kWh/hour

Integrates multiple heat recovery technologies, drastically reducing energy consumption!

Reduces the probability of casting failure due to excessive mold humidity, greatly improves product yield, increases corporate profits, and lowers overall costs.

Comparison of Different Solutions 10000 CMH Return Air 25°C/45%
Name	Dehumidification Capacity	Cooling Capacity	Electric Heating	Total Power	Annual Power Consumption (kWh)
Chilled Water + Electric Reheat	26 kg/h	117 kW	96 kW	145 kW	1,270,200
Variable Frequency Cooling + Condenser Heat Recovery	46 kg/h	96 kW	0	19.2 kW	168,192
Variable Frequency Cooling + Cold & Heat Recovery + Condenser Heat Recovery	46 kg/h	96 kW	0	11.7 kW	102,492

Customer's Actual Measured Data

Main Features

1. Utilizes DC inverter technology, achieving a minimum dew point temperature of 3~5°C.

2. Heat pipe heat exchanger with thermal conductivity reaching levels of 100,000.
3. Existing case (25°C/45% inlet air condition) recovers 54 kW of cooling capacity per 10,000 air volume.

4. Low humidity energy-saving operation, controllable return air humidity of 30% @ 25°C.

5. Uses self-developed DDC controller with touch control screen, enabling multiple adaptive algorithm adjustments for more flexible control.

6. Under conditions of 30% @ 25°C, it can completely replace high-energy consumption desiccant wheel dehumidifiers, with energy consumption less than 10% of that of wheel dehumidifiers.

7. Mobile APP for remote monitoring and remote OTA upgrades, enabling global remote maintenance.

8. Condenser heat recovery for reheating, using compressor waste heat to replace electric reheating, drastically reducing energy consumption.

9. Simultaneous temperature and humidity control. One unit equals the function of a traditional air conditioner + dehumidifier, requiring only the energy consumption of one device.

Remote OTA Upgrade

Case: A customer's equipment required cooling even in winter, with outdoor ambient temperatures below 0°C. After internal communication, we provided a solution immediately and completed the OTA upgrade within 3 hours.

Outstanding Energy Saving

More Energy Efficient: Existing case at full load operation (continuous inlet air 25°C/45%), 10,000 air volume requires only 11 kW compressor running power, dehumidification capacity reaches 30 kg/hour, deep cooling temperature can be maintained at 3.5°C.

Replaces the traditional chilled water + electric heating method (100 kW), saving the customer 70,000 yuan per month (for non-24/7 usage).

Dual electronic expansion valve throttling control + dual oil return design

High-precision control of refrigerant flow, longer compressor lifespan.

More effective and reliable compressor lubrication, longer lifespan.

High-temperature model can achieve 18-85°C supply air temperature.

Cascade system can achieve 18-120°C supply air temperature.

Condenser Heat Recovery (Outlet Air Temperature Can Be Set)

Recovers compressor waste heat for reheating.

Standard model can achieve 18-45°C supply air temperature.

Medium-temperature model can achieve 18-65°C supply air temperature.

Equipment Principle

1. Uses zero-energy-consumption heat pipe heat recovery to pre-cool air to 15°C.

2. Compressor refrigerant deep cooling cools air to 2°C, significantly reducing air moisture content.

3. Zero-energy-consumption heat pipe heat recovery pre-heats air to 15~18°C.

4. Compressor waste heat reheats air to 25~35°C (according to drying room heat demand).

5. No electric heating involved throughout the entire process. Pre-cooling, pre-heating, and reheating are achieved using zero-energy-consumption heat recovery technology.

What is a Heat Pipe?

A heat pipe is a heat transfer component with high thermal conductivity. It efficiently transfers heat through the phase change process (evaporation and condensation) of its internal working fluid at the cold and hot ends.

Its Main Characteristics

Extremely High Thermal Conductivity: Its heat transfer capability far exceeds that of most solid metals.

Passive Operation: Requires no external power, operates solely on its own physical processes.

Application Fields: Commonly used in areas with extremely high heat dissipation requirements, such as: Semiconductor heat dissipation, Aerospace, High-efficiency energy-saving air conditioning and dehumidification systems, Rapid Thermal Response: Can quickly transfer heat from the heat source to the heat sink.

Heat Pipe vs. Common Material Thermal Conductivity Comparison

Heat Pipe vs. Common Material Thermal Conductivity Comparison Table
Material	Thermal Conductivity W/(m*K)
Heat Pipe	5,000-100,000
Silver	429
Copper	401
Aluminum	273
Pure Iron	80
Stainless Steel 304	14

Actual Measured Performance, Redefining Energy Efficiency Standards

· Cooling COP: 9.5
· Comprehensive COP: 19
We have integrated all cutting-edge energy-saving technologies to reduce your operating costs to unprecedented new lows.