SUMMARYThis paper presents the study of a thermoelectric cooler (TEC) designed for small-scale space conditioning applications in buildings. A theoretical study was undertaken to find the optimum operating conditions, which were then applied in the laboratory testing work. A TEC unit was assembled and tested under laboratory conditions. Eight pieces of UltraTEC were shown to generate up to 220 W of cooling with a COP of 0.46 under the input current of 4.8 A for each module. Thermo-economical analysis was carried out and results showed that a system with PV panel can compete with an equivalent system without a PV panel when PV costs fall down to or lower than £1.25 per Watt. For the cases without a PV panel, the system with a high level of TEC power input delivered a better performance in terms of the average cooling energy price than that system with a low level of TEC power input after critical interest rate (currently 4%).

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Abstract. Modern healthcare facility has unique power system requirements as the power quality and reliability is a crucial feature to maintain the critical services such as surgical operations, intensive care units and other critical services. Healthcare facility has become dependent on the quality of electrical supply. This paper aims at assessing the level of harmonic pollution to a health care facility. The investigation focus on assessing the level of THD on this healthcare facilitates.Further discussion includes various ways of reducing harmonics in health care facilities from the study it was found that although there are numerous amount of harmonics producing equipments exist, the total harmonics distortion is still within the recommended level as advise by IEEE 519. There is also clear evidence that active filter using active harmonics conditioner play an important role to this instance.

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