H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  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...

  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 mee...

  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:...

  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 cool...

  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 ...

  As global attention to environmental protection and climate change continues to rise, the choice of refrigerants for cold storage not only affects efficiency and cost-effectiveness but is also influenced by international environmental regulations. Agreements like the Paris Agreement and the Montreal Protocol, with the Kigali Amendment, impose new requirements on refrigerant usage. This article will introduce the physical characteristics, application advantages and disadvantages of commonly used refrigerants, and analyze them in the context of international environmental regulations. 1.  R22  Screw Type Air Source Heat Pump  (Hydrochlorofluorocarbon - HCFC): Physical Characteristics: R22 was once one of the most widely used refrigerants, known for good heat exchange performance, low toxicity, and moderate Global Warming Potential (GWP). Category: Hydrochlorofluorocarbon (HCFC). Advantages: High energy efficiency, cost-effective, strong adaptability to equipment. Dis...

  Introduction: Cooling towers  are a fundamental component of industrial refrigeration systems, but understanding the various costs associated with them is crucial for businesses considering their implementation. In this article, we will delve into the costs of cooling towers in industrial refrigeration and provide insights for potential buyers of refrigeration equipment. 1. Initial Purchase and Installation Costs: Cooling Tower Selection: The cost of a cooling tower can vary significantly based on its size, capacity, and design. Larger cooling towers with higher capacities will generally have higher initial purchase costs. Installation Expenses: Installing a cooling tower involves various expenses, including site preparation, foundation construction, piping, and electrical work. These installation costs should be factored into the overall budget. Engineering and Design: Engaging professionals for engineering and design services is necessary to ensure the cooling tower is pro...