A novel centrally heated, externally cooled (CHEC) adsorbent bed is conceptualized, modeled, and tested at a lab scale. It eliminates the need for cooling liquid lines and controls to the adsorbent bed, reducing system complexity and allowing the system to be used over a large range of thermal inputs. The reduction in complexity is achieved by using the external surface of the bed to directly transfer heat to the surrounding air. Such a system is ideal for small-scale waste heat utilization where a chiller tower cost or space prohibitive. The activated-carbon/ammonia working pair is chosen and system performance modeled over a range of waste heat temperatures. Coefficients of performance (COP) of up to 0.1 and Specific Cooling Capacities (SCC) of 4-80 W kg^-1 are predicted and demonstrated experimentally for small-scale systems delivering 100 watts of cooling or less. Performance is expected to improve dramatically at larger system scales due to the larger bed-to-auxiliary thermal mass ratios. This concept trades system efficiency for reduced system complexity. It should also improve system reliability and reduce system cost by eliminating valves and pumps required for the cooling system.

在实验室规模上对新型的中央加热，外部冷却（CHEC）吸附床进行了概念化，建模和测试。它消除了对冷却液管线和吸附剂床进行控制的需求，从而降低了系统复杂性，并允许该系统在较大的热输入范围内使用。通过使用床的外表面直接将热量传递到周围的空气中，可以降低复杂性。这样的系统非常适合小规模的余热利用，在这种情况下，冷却塔的成本或空间都无法满足。选择活性炭/氨工作对，并在一系列余热温度范围内对系统性能进行建模。最高0.1的性能系数（COP）和4-80 W kg ^-1的比制冷量（SCC）对于提供100瓦或更少功率的小型系统进行了预测和实验证明。由于较大的床与辅助热质量比，预计在较大的系统规模下性能会显着提高。该概念以系统效率为代价来降低系统复杂性。它还应消除冷却系统所需的阀门和泵，从而提高系统可靠性并降低系统成本。