When choosing a condenser and evaporator for a cold store, there are several factors to consider, including the purpose, size, cooling capacity, and energy efficiency requirements of the cold storage. Here are some detailed guidelines:
About the choice of cold storage condenser:
1. Cooling method: According to the different cooling medium, the condenser can be divided into air-cooled and water-cooled.
Air-cooled: suitable for small cold storage with small cooling load and limited space. It cools the refrigerant by air convection and does not require additional water sources, making it suitable for places where water is limited.
Water-cooled: suitable for large and medium-sized cold storage, with high cooling efficiency and can handle larger cooling loads. A stable water supply system is required.
2. Type of structure:
Shell-and-tube condensers: divided into vertical and horizontal. The vertical shell-and-tube condenser occupies a small area but has a large water flow resistance, while the horizontal shell-and-tube condenser has a small water flow resistance but occupies a large space.
Casing condenser: Commonly used in small refrigeration systems with high heat transfer efficiency.
Spiral plate condenser: suitable for freon refrigeration systems, with a large heat transfer area, but a low refrigeration capacity per unit volume.
3. Materials: When choosing a condenser, the type of refrigerant should also be considered. For example, seamless steel pipes are typically used when the refrigerant is ammonia, and low-ribbed copper pipes are used when freon.
About the choice of evaporator for cold storage:
1. Type: Evaporators for cold storage are mainly divided into air coolers and cooling pipes.
Air cooler: suitable for cooling and freezing purposes, with large air volume and good cooling effect, it is often used in transition temperature storage.
Cooling pipe: suitable for freezing use, high heat transfer efficiency, suitable for cold storage to maintain a low temperature environment.
2. Materials and structures: According to the requirements of the medium in the warehouse (such as food), select the appropriate materials and structures to ensure hygiene and safety.
3. Energy efficiency and capacity: According to the cooling demand and energy consumption standards of the library, select the evaporator with high energy efficiency and appropriate capacity.
All things considered:
Water quality: Water-cooled condensers have requirements for water quality, and local water quality needs to be considered.
Environmental factors: The installation location of the air-cooled condenser needs to consider the surrounding environment to avoid dust and debris affecting the heat dissipation efficiency.
Economy: On the premise of meeting the performance requirements, consider the economy of the initial investment and operating costs.
In the specific selection, it is recommended to communicate with a professional refrigeration engineer or supplier, and make detailed calculations and matching according to the actual cold storage design parameters and use requirements to ensure the stability and economy of the system.