كتل الجليد السلسلة الباردة: الاستخدامات الرئيسية, فوائد & الابتكارات
كتل الجليد الباردة هي أجهزة العمل الصامتة للخدمات اللوجستية التي تسيطر عليها درجة الحرارة, acting as compact thermal batteries that absorb ambient heat spikes and keep payloads within a narrow, validated range. Their cores typically employ phase‑change materials (PCMS) tuned to freeze at –20 °C, 0 درجة مئوية, أو +5 درجة مئوية; during transit these PCMs melt slowly, holding a stable plateau that prevents vaccine hot spots and food spoilage. Modern blocks encase the PCM in puncture‑resistant HDPE or PP shells that withstand more than 100 تجميد دورات الجليد, reducing waste and total cost of ownership for shippers. Performance now hinges on three factors: latent‑heat capacity, shell conductivity, and block geometry. High‑density salt‑hydrate PCMs offer up to 300 kJ kg⁻¹ of latent energy, more than doubling the hold time of traditional water‑based gels. في أثناء, ribbed or flat‑plate designs maximize surface area, speeding charge and discharge in fast‑moving cold rooms. To verify reliability, blocks are routinely tested under ISTA 7D and WHO/PQS protocols, ensuring variance stays below ±2 °C even in last‑mile deliveries where ambient swings...
