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  From Rooftop to Radiators: Smart Heating for 60,000 m²

  From Rooftop to Radiators: Smart Heating for 60,000 m²

  Project Overview Project Name: Community Central Heating Project Building Area: 60,000 m² Heating Method: Air Source Heat Pump This project focuses on providing sustainable and efficient heating for a large residential community by adopting advanced dual-system low ambient air source heat pump units. Project Requirements & Design To ensure reliable heating performance in cold climates, the project utilizes screw-type low ambient air source heat pump units. Each unit is equipped with two screw compressors, operating in a dual-system dual-circuit design to enhance safety and redundancy. Type Building Area Winter Indoor Temperature Heating Load Terminal Type Residential Community 60,000 m² 18 ~ 22℃ 3000KW Floor Heating The system allows outlet water temperature adjustment between 30℃ and 55℃, providing flexibility according to seasonal heating demands. With its split structure design, the compressor and condenser are installed indoors, while the air-cooled fins are placed on the rooftop, reducing outdoor noise and optimizing building integration. System Configuration • Dual-System Heat Pump Units with screw compressors • Split Design: indoor compressors & condensers, rooftop air-cooled fins • PLC Intelligent Control with remote cloud-based monitoring • EC Fans ensuring energy savings and low noise Equipment Name Heating Capacity Heating Power Hot Water Supply and Return Temperature Quantity Screw-Type Low Ambient Air Source Heat Pump 1000KW 356 kW 45℃/40℃ 3 sets Advantages of the Project 1. Eco-Friendly: No boiler room required; zero on-site emissions. 2. High Efficiency: Consumes 1 kWh of electricity to deliver 2.5–3.5 kWh of heat. 3. Flexible Operation: Adjustable water temperature and operation time to suit user demand. 4. Smart Control: Fully automated PLC with cloud monitoring—no dedicated operator needed. 5. Low Noise & Low Energy Fans: EC fans provide quieter, more efficient operation. 6. Split Design Benefits: o Reduced rooftop load o Indoor compressor placement minimizes outdoor noise o Key components indoors extend system lifespan On-Site Images This project demonstrates how dual-system low ambient air source heat pumps can replace traditional heating solutions, offering a cleaner, quieter, and more energy-efficient central heating option for residential communities.

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  HStars Single Unit System: 5℃/38℃ Simultaneous Control for Dual-Temperature Experiments

  HStars Single Unit System: 5℃/38℃ Simultaneous Control for Dual-Temperature Experiments

  In industrial and scientific testing, precise temperature control is critical. For a gas meter module test project, the challenge was clear: create two temperature-controlled rooms, one at 5℃ and another at 38℃, to run 4-hour methane-filled tests under strict stability and safety standards. Instead of relying on two separate systems, H.Stars delivered an integrated solution with a single hot-and-cold supply unit. Project Requirements Test Needs: • One 5℃ constant-temperature room • One 38℃ constant-temperature room • Test modules placed in sealed boxes, inside methane-filled test rooms Temperature Control: • Fluctuation: ±0.5℃ • Uniformity: ±1℃ • Heating rate: reach target in 30 minutes (no load) Control System: • Energy-saving water circulation design: cooling at 5℃ recycles heat for 38℃ heating • At least 4 monitoring probes to ensure temperature uniformity, with separate control and monitoring sensors • Large circulation fans evenly distributed for stable internal airflow Safety Measures: • Explosion-proof equipment for lights and electrical components inside the test rooms System Configuration • Hot-and-cold supply unit: 1 set (Cooling capacity: 17.4 kW / Heating capacity: 24 kW) • Ceiling-type air coolers: 4 sets • Chilled water pumps: 2 sets • Hot water pumps: 2 sets Advantages of the H.Stars Solution 1. Dual-function in one unit – One machine simultaneously provides cooling and heating, meeting both lab needs. 2. Stable water system – Buffer tank with proportional-integral valve ensures precise temperature stability. 3. Backup heating – Electric heater prevents low-load winter issues. 4. Space-saving design – Special cold room doors share tracks, solving installation constraints. 5. Smart automation – Advanced H.Stars control ensures precise and stable lab conditions. 6. Lower maintenance – Refrigerant centralized in one unit, with smaller charge, reduced leak risk, and lower long-term costs compared to multi-split systems. Conclusion With H.Stars’ hot-and-cold integrated system, a single solution can achieve both 5℃ cooling and 38℃ heating, providing precise, safe, and energy-efficient temperature control for dual-condition experiments. This innovative design not only reduces equipment costs but also ensures long-term reliability and ease of maintenance.

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  Mine air conditioning Systems

  Mine air conditioning Systems

  1. Project Overview:  This project is located in Yantai City, Shandong Province, and is a gold mine air systems project for China National Gold Group Co., Ltd. Mine depth: 1500 meters, it is expected that the temperature of the surrounding rock of the working face will reach 43°C when the shaft reaches the bottom, and the temperature of the working face should be maintained at 25~28°C. 2. Ventilation requirements for underground mine ventilation systems Category Working space shaft of a well net diameter Ventilation parameters Air volume Number of operations Auxiliary shaft 50 meters 8.2 meter 8 times/h 21000 m3/h 8~10 people 3. the Program Advantages  1. Using 3-level cooling, fresh air conditions: 40 degrees in / 14 degrees out. The air outlet range of the unit: 14~40 degrees 2. The mine air conditioning systems are designed with double air outlets, and fresh air is used for air supply in transitional seasons and winters to reduce operating costs. 3. Easy to clean and adjust: the air inlet is equipped with 304# stainless steel rain-proof elbow, detachable 304# stainless steel insect-proof net, and aluminum alloy manual air volume control valve, 1" plate type washable multi-layer aluminum alloy filter; 4. Precise temperature control: 3-segment coils are matched with proportional and integral valves, temperature controllers, 5. High-quality coil: copper tube + blue wave aluminum fin cold water coil, with slope-shaped stainless steel collecting basin; 6. Italian brand NICOTRA fan, Guangdong Jiangsheng motor, with negative pressure inspection door. 7. The inner and outer panels are color steel plates, and the thickness of the wind cabinet panel: 50mm; 8. The unit uses self-produced high-efficiency fin heat exchangers and hydrophilic aluminum thin fins. 9. Adopt Hanbell compressor, high energy efficiency, stable performance, low noise and low vibration. It has a wide range of operation and can adapt to different operating conditions. 10. The external rotor axial flow fan is adopted, with high air volume, high efficiency, sufficient dynamic pressure, and IP54 protection level. 11. Adopt self-produced high-efficiency flooded evaporator. 12. Unit cop: 3.2 13. Adopt Danfoss electronic expansion valve throttling device to ensure quality. 14. Reliable operation, the unit has a variety of safety protection measures to ensure the safe operation of the unit. 15. Intelligent control: With cloud service system, customers can understand the operation of the unit in an all-round way at any time. 16. Integrated equipment can reduce initial investment costs (civil construction costs and installation costs) 4. Reflect the value of the product  Convince clients of the benefits of our solution, and the value it can create: Reduce competitors: peer manufacturers do not have this technology accumulation, or are unwilling to do such non-standard customization Profitable: It is difficult for customers of niche non-standard products with technological advan...

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  How to design the best Anti corrosion marine sea water air cooled screw chiller --- for offshore drilling platforms

  How to design the best Anti corrosion marine sea water air cooled screw chiller --- for offshore drilling platforms

  How to design the best Anti corrosion marine sea water air cooled screw chiller --- for offshore drilling platforms? As what we know , the market with anti corrosion unit has got different class and some of the equipment can only be used for a few years and damaged. Today, let’s check the bellowing design solutions and find out what are the useful information you might gain and learn from. 1. Project Overview: This project is designed for offshore drilling platforms America, which is used to  provide comfortable Screw Type Chiller to the personnel on the offshore drilling platforms. According to actual need of customer, this project was advised to use our Anti corrosion marine sea water air cooled screw chiller (Copper fin + copper tube +special coating to achieve a salt fog test for 3000 hours) due to corrosive environment on the sea , which can safely extend the life span of the chiller unit and make constant sufficient cooling air to the workshop on the drilling platform. Specification of the Unit 1 Ch150RT Chiller Unit Design H.Stars Chiller Production Photos Chiller Installation Site System Advantages Regarding to the limitation of installation site (Both corrosive air and space limited), the unit has to be designed with anti-corrosion, energy saving and compact size . It adopts air-cooled Flooded Type Screw Type Chiller with shell and tube heat exchangers 1. Flooded type evaporator reduces energy consumption by 10%-15% compared to dry type evaporator 2. R134a refrigerant :ODP 0 ( no damage to ozone) 3. Copper fins, better anti-corrosion performance 4. IP55 anti-corrosion fan anti-corrosion, waterproof, low failure rate 5. 316 stainless steel electric box more effectively protects electrical components 6. Siemens PLC controller is connected with the customer's central control to realize automatic energy-saving control 7. Galvanized channel steel, special anti-corrosion paint, better anti-corrosion performance, 3000 hours salt spray test to ensure the quality. H.Stars Group has specialized in customization chiller unit production for 30 years, as one of the top manufacturer and Hongkong brand, we always focus on quality orientation for all clients.For more details, welcome to contact us sales@hstars.com.cn

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  How to design a constant temperature and humidity air conditioning system for Pharmaceutical factories

  How to design a constant temperature and humidity air conditioning system for Pharmaceutical factories

  For pharmaceutical factories, some production line requires a constant temperature and humidity air conditioning to keep the room ambient for special purpose use. However ,how to design an air conditioning system with stable constant temperature and humidity for the room in pharmaceutical factories?Below are the project reference that H.Stars Group has designed for one the client . Project overview Project address: Qujing City, Yunnan Province Project name: Constant temperature and humidity air conditioner for oral solid preparation workshop Project requirements: Location Area Temp requested/℃ Humidity requested/% Number of air changes Cleanliness level Summer Winter Summer Winter Clean workshop 1600m2 24±2 18±2 50~70 50~70 15 times/h 100,000 level Solution design 1. System cold and heat source: The system cold source is equipped with “HSTARS" screw water-cooled chillers, and the heat source is municipal steam. 2. Supply and return water temperature: 7℃/12℃ in summer 3. Water system: a closed mechanical circulation system is adopted, and two vertical circulating water pumps (1 used and 1 prepared) are selected. 4. Air system: the end adopts horizontal constant temperature and humidity air cabinet and secondary air return system. 5. Cooling system: “HSTARS" low-noise circular cooling tower is adopted to solve noise complaints in residential areas. 6. Control system: adopt Siemens PLC fully automatic control. System schematic diagram Device Configuration Equipment Parameters Qty Remarks Screw type water-cooled chiller Cooling capacity: 373KW Input power: 70KW 1 Round cooling tower Flow rate: 100m³/h Input power: 2.2KW 1 Horizontal constant temperature and very humid wind cabinet Air volume: 35000m³/h Cooling capacity: 200KW 2 Vertical cooling water pump Flow rate: 91m³/h Head: 27m 2 One for use one for standby Vertical chilled water pump Flow rate: 81m³/h Head: 32m 2 One for use one for standby Energy-saving design 1. The air system is designed with a secondary air return system to balance cooling and heating and reduce operating costs. 2. The purification air cabinet adopts the dew point air supply method, which greatly reduces the energy loss caused by dehumidification and reheating, and saves more than 30% of the annual cost compared with the ordinary method. 3. Combination of main and end, combined wind and water adjustment; under the premise of ensuring indoor comfort, the air system and water system are adjusted synchronously based on the end load demand. 4. The fresh air equipment has a clean and dehumidifying function to ensure the quality of fresh air and achieve the purpose of energy saving at the same time . Solution advantages: (1) Stable performance: It adopts screw compressor with stable performance, low noise and long service life. (2) Independent property rights: Unique internal oil return design of the evaporator, low oil return load and high efficiency. (3) Safe and reliable: The unit is equipped with multiple protections to ensur...

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  How to Design a heat pump drying system for drying production

  How to Design a heat pump drying system for drying production

  How to Design a heat pump drying system for drying production with the most stable and reliable drying unit project ? Here is a good example to the project with an energy-saving transformation project of leather gelatin long net drying production line system. The process flow of the project is fresh air - medium efficiency filtration - fresh air pretreatment - return air of the production line - medium efficiency filter - dehumidification of lithium chloride solution - air supply cabinet - heating and drying in the drying room - exhaust fan - exhaust (return air), with a total circulating air volume of 90000 M ³/ h. The low-temperature dry air dehumidified by the lithium chloride solution dehumidifier enters the long net drying room and is heated by steam to meet the drying process requirements. Part of the dried high-temperature and high humidity air is directly discharged outdoors through the exhaust fan, and part of it returns to the air conditioning cabinet and lithium chloride solution regenerator. Such circulation will discharge great heat every day, resulting in serious energy waste. According to the process production requirements, this design includes the design contents of production line chilled water, drying room hot water and exhaust heat recovery . 1: Original configuration of production line Content refrigeration unit Heating unit Cold heat 930kw 1860kw energy consumption 185kw 2.65m³steam Hot and cold water temperature 12/7℃ 75/55℃ Drying room temperature 4 air chamber 40 ℃, relative humidity 55%, 8 air chamber 55 ℃, 18% 2: Heat recoverable from the production line Num Cooling equipment Enthalpy of temperature and humidity at state point Airflow Heat recovery 1 4 air chamber exhaust 40℃，55%，108kj/kg 15000m³/h 164kw 2 8 exhaust of air chamber 55℃，18%，102kj/kg 10000m³/h 111kw 3 Regeneration exhaust 40，55%，108kj/kg 20000m³/h 250kw 4 Return air of air cabinet 40，40%，108kj/kg 45000m³/h 515kw Total： 1040kw Project design 1.Description of heating system transformation The project is designed by H.Stars Group and adopted with two high-temperature water source heat pump units, which are connected in series to the heating return water of the original system to the steam heating section. The heating return water of the original system is first heated by adding the primary and secondary heating of the high-temperature water source heat pump unit. If the outlet water temperature of the heat pump does not reach the set 75 ℃ after heating, the steam heating will start automatically. The heating capacity of the primary high temperature water source heat pump unit is 818kw and the input power is 235Kw; The heating capacity of two-stage high temperature water source heat pump unit is 806kw and the input power is 265KW. 2. Description of exhaust heat recovery transformation ： A 10³m is added in the design  The square insulated water tank transmits 15 ℃ cold water to each heat recovery ceiling air cabinet through the circulating pump, and the 20...

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  Cold storage in drink processing industry | Hstarschiller.com

  Cold storage in drink processing industry | Hstarschiller.com

  One of the Chinese Fruit Industry Co., Ltd in drink processing industry, H.Stars Group,a HVAC factory, has designed the project with a Cold storage equipment raw material storage and preservation warehouse invested by one of the Fruit Industry Co., Ltd., with a storage capacity of 10000 tons, a temperature of 0 ~ 5 ℃ in the warehouse and a total of 9 cold warehouses. The quick freezing warehouse of the project adopts two star parallel screw water-cooled condensing units 20stb-l180wth2, the evaporator adopts ceiling cooling fan, and the condensing equipment adopts cooling tower. The whole system adopts centralized cooling mode, and the cooling fan adopts water frost flushing mode. The project advantages: 1、The cold storage adopts a four head parallel condensing unit to realize the mutual allocation and use of cooling capacity among cold storage, save initial investment, and more flexibly adapt to the change of heat load of cold storage due to different storage volume of goods。 2、The condensing unit adds heat recovery function and provides free hot water flushing for the cold storage。 3、The water storage tank of the cooling tower is transformed to combine it with the frost flushing water tank, and the frost flushing water is mixed with the condensate to realize the recovery of cold and heat energy, which not only improves the condensation effect of the quick freezing condensing unit, but also ensures that the temperature of the frost flushing water will not be too low after several cycles 4、The water defrosting system of the project not only realizes the effect of water saving, but also solves the problem of defrosting water temperature by recovering the defrosting water for use in the cooling tower 5，The refrigeration (- 18 ℃) condensing unit and cooling fan adopt the method of one-to-one correspondence, and the system is safe and reliable 6、The cold storage hall adopts low-temperature hall to reduce the outdoor hot air entering the cold storage. 7、The whole project adopts a centralized monitoring system, which is simple to operate, monitors the cold storage temperature anytime and anywhere, and has the cold storage fault alarm function. H.Stars Group has specialized in manufacturing HVAC equipment for 30 years. Welcome to contact us for more details at sales@hstars.com.cn

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  Water cooled chiller for VOC waste gas condensation recovery project

  Water cooled chiller for VOC waste gas condensation recovery project

  Project Overview H.Stars Group has recently design a project  for one of the Forest Products Technology Co., Ltd. For 9500 tons/year turpentine deep processing and 6500 tons/year rosin deep processing products (Phase I) project. This design is mainly for the condensation and recovery of organic solvents in the VOC tail gas. Project requirements Process chilled water: 50m³/h, supply and return water temperature: 12/17℃, water supply pressure: 0.4MPa Proposal design This project design uses a 40STD-370WSI4 water cooled chiller unit with a dual-cycle design and a 15m³ intermediate buffer water tank. The process water supply pump adopts constant pressure frequency conversion control, and the screw chiller is automatically loaded and unloaded under the temperature control of the intermediate buffer water tank. Project system diagram Solution advantages 1. Adopt special screw type industrial chiller, set up double cycle system, the unit energy efficiency ratio is above 6.0 and the comprehensive energy efficiency ratio is as high as 13, and the operation energy consumption is low. 2. After the completion of the project, the recovery rate of organic solvents in the VOC tail gas is as high as 90%. 3. The whole system adopts fully automatic control, automatically put into operation according to temperature changes, reducing energy consumption. 4. This project has a central computer room with integrated design and centralized management to minimize investment costs and operating management costs. For more details , welcome to contact us at sales@hstars.com.cn

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