H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  Extended use of condensers in   HVAC systems   often leads to the formation of scale deposits in the pipes. If not addressed promptly, these deposits can compromise heat exchange efficiency, resulting in elevated condensation temperatures, reduced cooling capacity, and increased power consumption. Regular scale removal is crucial for maintaining optimal system performance. Methods for Scale Removal and Prevention: Mechanical Descaling Method: Procedure: Evacuate refrigerant from the condenser. Close all valves connected to the refrigeration system. Supply cooling water to the condenser. Use a flexible shaft cleaner with a rotating scraper to gently remove scale deposits. Employ circulating cooling water to cool the scraper and flush removed debris into a collection tank. Considerations: Choose an appropriate scraper diameter for effective yet non-damaging descaling. Conduct the process in multiple passes for thorough scale removal. Chemical Cleaning Method: Procedure: Prepare a desca

  In the design and operation of data center air conditioning systems, accurately calculating the cooling capacity is a key factor in ensuring efficient and stable operation. This article delves into the methods of calculating cooling capacity and its application in different types of  data centers. 1. Methods for Calculating Cooling Capacity Calculating cooling capacity is the foundation for assessing the air conditioning needs of a data center. The main methods include the power and area methods, taking into account the heat generated by equipment and the environmental heat load. ​ Formula: Total Cooling Capacity (Qt) = Indoor Equipment Load (Q1) + Environmental Heat Load (Q2) Q1 = Equipment Power × 1.0 Q2 = 0.12~0.18 kW/m² × Data Center Area 2. Precision Air Conditioning and Cold Load Estimation For precision air-conditioned spaces such as data centers, cold load estimation needs to consider factors such as equipment heat load, environmental heat load, lighting, and personnel heat d

  A   screw chiller , also known as a screw compressor chiller, is a type of water chiller utilized for cooling applications in various industries, including injection molding. The semi-hermetic screw compressor is the core components of a screw chiller.  It operates based on the principle of a rotary screw compressor, which is a positive displacement compressor. The screw compressor consists of two interlocking helical rotors that compress the refrigerant gas to raise its pressure and temperature. According to different heat dissipation methods, screw chillers are divided into  air-cooled screw chillers  and water-cooled screw chillers. Under the same cooling capacity requirement, the purchase cost of water-cooled screw chillers is lower than that of air-cooled screw chillers. As far as chiller installation is concerned, air-cooled screw chillers are easier to install. Here are some key features of a screw chiller: Cooling capacity: Screw chillers are available in a wide range of cool

  As an integral part of the hospitality industry, hotels have high requirements for temperature control and fresh air. Various   refrigeration equipment   is necessary to meet the needs of comfort and food preservation. In this article, we will explore various typical refrigeration scenarios in hotels, along with specific refrigeration equipment used in different settings and their design selection principles. 1.Different Refrigeration Applications and Corresponding Equipment in Hotels As an integral part of the high-standard hospitality industry, hotels utilize various refrigeration equipment to provide guests with a comfortable and high-quality service environment, including dining experiences. Typical refrigeration applications in hotels include: 1.1 Central Air Conditioning System Designing a constant temperature and humidity central air conditioning system to control the temperature in public areas and accommodation spaces such as hotel lobbies, guest rooms, and meeting rooms. Ut

  Industrial heat pumps   have revolutionized the HVAC industry by providing energy-efficient heating and cooling solutions. This article aims to shed light on the efficiency, advantages, and diverse applications of industrial heat pumps, showcasing their significance in the field of thermal management. How Efficient Are Industrial Heat Pumps? 1.1 Understanding COP (Coefficient of Performance): - Explaining the concept of COP and its significance in measuring the efficiency of industrial heat pumps. 1.2 Energy Savings: - Highlighting the substantial energy savings achieved by industrial heat pumps compared to traditional heating and cooling systems. 1.3 Environmental Benefits: - Discussing the reduced carbon footprint and environmental impact resulting from the high efficiency of industrial heat pumps. Advantages of Industrial Heat Pumps: 2.1 Versatility: - Showcasing the versatility of industrial heat pumps in providing both heating and cooling capabilities. 2.2 Cost Savings: - Explor

  1.Components of  Chilled Water Pump  Head: Evaporator water resistance of the refrigeration unit: typically 5-7m water column (refer to product samples). Water resistance of end devices (air handling units, fan coils): usually 5-7m water column (refer to product samples). Resistance of components such as return water filters, two-way control valves: generally 3-5m water column. Water resistance of headers and manifolds: typically 3m water column. Friction and local resistance losses along the refrigeration system piping: typically 7-10m water column. In summary, the pump head for chilled water is in the range of 26-35m water column, usually around 32-36m water column. Note: Pump head calculation depends on specific refrigeration system conditions; avoid blindly applying empirical values. 2.Components of  Cooling Water Pump  Head: Condenser water resistance of the refrigeration unit: generally 5-7m water column (refer to product samples). Water pressure at cooling tower spray nozzles:

  The calculation of air supply in a cleanroom differs from that of a general HVAC system. HVAC systems determine air supply based on calculated thermal and humidity loads, considering an economical air supply temperature difference to eliminate excess heat and moisture. In contrast, cleanroom air supply is generally calculated independent of thermal and humidity loads. Instead, it is based on the required cleanliness level, considering cross-sectional average airspeed or air changes per hour. If necessary, thermal and humidity load calculations are used for verification, ensuring compliance with heat and moisture elimination requirements. Cleanroom air supply, typically calculated based on cross-sectional average airspeed or air changes, tends to be higher than the air supply calculated for heat and moisture elimination. If the calculated air supply falls short of the requirements for heat and moisture elimination, two solutions are considered: using the air supply calculated for heat