When building a cold room, insulation plays a critical role in energy efficiency, temperature stability, and long-term performance. Two of the most commonly used materials in cold room insulation are…
在冷库（coldroom）建设中，选择合适的保温板是确保冷藏效率、节能和安全的关键。当前市场上最常用的保温板材料主要有两种：PIR（聚异氰脲酸酯） 和 PUR（聚氨酯）。虽然两者看似相似，但它们在防火性、隔热性、价格与使用寿命方面却有明显差别。 什么是 PUR 和 PIR 保温板？ PUR（Polyurethane）保温板： 是传统的冷库用隔热材料，导热系数低，保温效果好。 成本较低，施工方便，广泛用于中小型冷库。 PIR（Polyisocyanurate）保温板： 属于 PUR 的升级版，具有更高的热稳定性与防火性能。 更适合对安全要求高的大型冷库或工业级冷藏中心。 冷库保温板常用厚度 根据冷库的类型和使用温度，保温板厚度可选择如下几种规格： 冷库温度类型推荐保温板厚度正温冷库（0°C ~ +10°C）50mm ~ 75mm中温冷库（-5°C ~ 0°C）75mm ~ 100mm低温冷库（-18°C ~ -25°C）100mm ~…
From July 1, 2025, Tenaga Nasional Berhad (TNB) implemented a new electricity tariff structure under Regulatory Period 4 (RP4) in Peninsular Malaysia. Here’s how this change affects home air conditioner…
马来西亚从 2025 年 7 月起的新电费结构概况 在 2025 年 7 月 1 日起，TNB（Tenaga Nasional Berhad）在西马地区实施新的电费结构（Regulatory Period 4, RP4），家用电费结构发生重大变动。[1] 关键变化包括： 取消原有的五阶梯电价（volume‑tiered pricing），改为 两段电价（Two‑Tier）制度： 每月用电 ≤ 1,500 kWh 时：27.03 sen/kWh [2] 每月用电超过 1,500…
Dimensions and units Any physical quantity can be characterized by dimensions. The arbitrary magnitudes assigned to the dimensions are called units. Some basic dimensions such as mass m, length L,…
Thermodynamics Thermodynamics can be defined as the science of energy. Although everybody has a feeling of what energy is, it is difficult to give a precise definition for it. Energy…
Introduction Heat Transfer Heat transfer is that science which seeks to predict the energy transfer which may take place between material bodies as a result of a temperature difference. Thermodynamics…
When it comes to understanding temperature and humidity, particularly in the context of meteorology, HVAC systems, and environmental science, two types of temperature measurements are commonly discussed: dry bulb temperature…
Top Tips for Air Conditioner Repair in Johor Bahru: Reliable Solutions for Your Comfort Living in Johor Bahru means dealing with a tropical climate—scorching heat, high humidity, and sudden thunderstorms…
Chillers are the backbone of cooling systems in industries, commercial buildings, and even large residential complexes. But not all chillers are the same—they come in various types, each designed for…
